Of Continuous Or Semicontinuous Casting Patents (Class 164/451)
  • Patent number: 8991217
    Abstract: Arnold (13) includes a recessed portion (21) for receiving a melt (2). The recessed portion (21) is constituted by an inner wall surface (29) for converting the melt (2) into a solidified portion when the inner wall surface (29) contacts the melt (2), and opens in a withdrawal direction (D1) of the solidified portion. A curved line formed by a first contour (23p) and a second contour (25p) has a cusp at a position of start points (43 and 45). The distance between the first contour (23p) and the second contour (25p) in a width direction (D2) increases continuously from an upstream side to a downstream side of the withdrawal direction (D1). The shape of the inner wall surface (29) of the recessed portion (21) is determined so that a cast rod (3) can be rotationally displaced clockwise or counterclockwise about an axis passing through a first end point (33) or a second end point (35) and perpendicular to a section of the mold 13.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: March 31, 2015
    Assignee: Panasonic Corporation
    Inventors: Yuma Kamiyama, Kazuyoshi Honda, Daisuke Suetsugu
  • Publication number: 20150078959
    Abstract: Steam exhaust ports are located around a perimeter of a direct chill casting pit, at various locations from below the top of the pit to the pit bottom to rapidly remove steam from the casting pit with addition of dry excess air. Gas introduction ports are also located around a perimeter of the casting pit and configured to introduce an inert gas into the casting pit interior.
    Type: Application
    Filed: May 16, 2013
    Publication date: March 19, 2015
    Applicant: ALMEX USA, INC.
    Inventors: Ravindra V. Tilak, Rodney W. Wirtz, Ronald M. Streigle
  • Publication number: 20140367065
    Abstract: A method of casting a thin strip is disclosed. The method includes assembling a pair of side dams adjacent end portions of counter-rotating casting rolls through which a strip of metal can be cast to permit a casting pool of molten metal to be formed supported by the casting surfaces of the casting rolls, assembling a metal delivery system above the casting rolls delivering molten metal to form a casting pool supported on the casting surfaces of the casting rolls above the nip and confined by the pair of side dams, assembling a mechanical screw drive to move axially the side dams toward the casting pool, counter-rotating the casting rolls such that the casting surfaces of the casting rolls each travel inwardly to produce a cast strip downwardly from the nip, and moving the side dams axially inward toward the casting pool at a rate of between 0.4 and 5.0 mm/hour by actuation of the mechanical screw.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Applicant: NUCOR CORPORATION
    Inventors: Gary MCQUILLIS, William M. KOVAL
  • Patent number: 8788084
    Abstract: The inflow of liquid metal into a continuous casting mold is set by a closure device. A measured actual meniscus value is fed to a controller determining a closure device target position on the basis of the actual and a corresponding target value. The measured actual value is fed to a disturbance variable compensator. The target position/corrected target position or a corresponding actual value are further fed to the disturbance variable compensator which determines the disturbance variable compensation value. The disturbance variable compensator has a model of the continuous casting mold for determining an expected value. A number of oscillating compensators determine a frequency disturbance proportion. The sum of the frequency disturbance proportions corresponds to the disturbance variable compensation value. The disturbance variable compensator has a jump determiner, by which it determines the jump compensation value by integrating the difference.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 22, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Niemann, Bernhard Weisshaar
  • Publication number: 20140116639
    Abstract: Maintaining the shell surface temperature profile under transient conditions by spray water cooling in continuous casting of steel is often desired to reduce occurrence of surface cracks. For this purpose, a real-time spray-cooling control system is provided that includes one or more of: a virtual sensor for accurate estimation/prediction of shell surface temperature, control algorithm and data checking subroutines for robust temperature control, server and client programs for communicating between these software components and the caster, and a real-time monitor to display the predicted shell surface temperature profiles, water flow rates, and operating data, among other things.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: Board of Trustees of the University of Illinois
    Inventors: Brian G. Thomas, Joseph Bentsman, Kai Zheng
  • Patent number: 8655476
    Abstract: A method and system for optimizing a simulated casting of a light weight alloy component. The simulation includes passing component design data through various computational modules relating to casting designs, process modeling and optimization, material microstructure and defects and product performance. Variations in microstructure and defects across various very small size scales are extended to increasingly larger scales to permit structural performance calculations of the cast component to take such non-uniformities into consideration. At least some of the modules employ an expert system-based approach to achieve the optimized results. The results can be compared to end user needs to determine if redesign of the part geometry or manufacturing process is needed.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: February 18, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Qigui Wang, Peggy E. Jones, Yucong Wang, Dale A. Gerard
  • Patent number: 8505612
    Abstract: A method to cover the exposures of a bath of molten steel by elements of casting powder in an ingot mold of a plant for the continuous casting of steel, including a step of subdividing the ingot mold into a desired number of zones, with each of which a covering movement is associated, the zones being determined and identified in a manner coordinated with the position of the snorkel and of the edge of the ingot mold, and a step of automated execution of one or more covering movements by elements of which the casting powder is distributed in a selected one of the zones, which movements, repeated in sequence according to a desired program, are selected from a group including pouring movements and throwing movements, at least on the basis of the reciprocal position of each of the zones and the snorkel.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: August 13, 2013
    Assignee: Danieli Automation SpA
    Inventor: Ferruccio Della Vedova
  • Patent number: 8499821
    Abstract: A method for the detection and classification of surface defects on continuously cast products using topographical information about the appearance of continuously cast surface defects and/or flaws are determined with respect to their exact position, evaluated with respect to their location and dimensions, and eliminated in accordance with the evaluation prior to further machining of the product, or are prevented by optimizing the process. The defects and/or flaws on the slab surface of the continuously cast preliminary product are detected and are stored with respect to their exact position and a detection of defects and/or flaws on the finished product is carried out and stored with respect to their exact position, and in that the information from the preliminary product is then compared with the information from the surface inspection on the finished product.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: August 6, 2013
    Assignee: SMS Siemag AG
    Inventors: Dieter Rosenthal, Stephan Schulze, Ingo Schuster, Peter Sudau, Rainer Fackert, Andreas Weinert, Wilfried Schumacher
  • Publication number: 20130168037
    Abstract: A casting furnace for manufacturing a metal casting comprises an interior chamber and a secondary chamber through which the metal casting passes from the interior chamber into external atmosphere. A seal along the secondary chamber surrounds and seals against the metal casting to separate the interior chamber from the external atmosphere in a manner which allows for an extended period of continuous casting. A force producing mechanism may force the seal against the metal casting. Multiple seals may be used sequentially to increase the duration of the sealing capability and the continuous casting process. Inert gas sensors may detect loss of inert gas from the interior chamber.
    Type: Application
    Filed: February 26, 2013
    Publication date: July 4, 2013
    Applicant: RTI INTERNATIONAL METALS, INC.
    Inventor: RTI International Metals, Inc.
  • Patent number: 8459333
    Abstract: A rolling mill for producing rolled rolling stock is operated in a continuous manner by integrally forming the rolling stock during scheduled operation from a supply device which supplies the stock to the rolling mill to one finishing rolling train arranged downstream of the rolling stock supply device by guiding the stock into the finishing rolling train continuously and rolling it to form a first outflow product. The operation is monitored for a deviation from the scheduled operation that influences the rolling process, wherein in case of a deviation measures are taken to examine whether a second outflow product, which is different from the first outflow product, can still be produced. If the second outflow product cannot be produced, the operation of the rolling mill is altered from a continuous operation to a discontinuous operation, whereby production failures caused by undesired process deviations in a rolling mill can be reduced.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: June 11, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Matthias Kurz, Hans-Ulrich Löffler
  • Patent number: 8397794
    Abstract: Described herein is a twin roll caster including a pair of casting rolls arranged parallel to one another with a gap between the casting rolls and side dams parallel to one another forming a pool between the casting rolls and side dams. A side dam support is provided that applies a compression force on at least one of the side dams at a compression angle relative to the axis of the casting rolls.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: March 19, 2013
    Assignee: Castrip, LLC
    Inventors: Katsumi Nakayama, Atsushi Hirata, Kiroyuki Otsuka, Hisahiko Fukase
  • Patent number: 8355894
    Abstract: Systems for predicting casting defects and microstructure in suppliers/vendors' castings for part/system durability analysis without knowing the details of the casting layout and casting gating and riser design as well as casting process parameters are provided. The systems involve the use of an integrated pore growth and interdendritic flow model. Methods of predicting casting defects and microstructures of a part without knowing the details of the casting layout and casting gating and riser design as well as casting process parameters and articles of manufacture are also provided.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: January 15, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Qigui Wang, Gerald Peter Backer, Daniel L. Metzger
  • Patent number: 8336602
    Abstract: A continuous casting installation (20) including a strand guide having strand casting segments with rollers (2) for guiding a cast strand, wherein at least one of the strand casting segments (22, 23, 24, 25, 26, 27) is formed as a measurement segment, wherein there is provided at least one measurement point for direct or indirect determination of a force acting on one or several rollers (2), wherein further the at least one measurement point is provided on a support housing (30), preferably between the support and the segment frame of strand casting segment, and there is provided a data processing unit that based on data of the at least one measurement point determines the solidification states of the cast strand.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 25, 2012
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Ina Huellen, Andreas Runge, Holger Beyer-Steinhauer, Markus Reifferscheid
  • Publication number: 20120273156
    Abstract: Described herein is a twin roll caster including a pair of casting rolls arranged parallel to one another with a gap between the casting rolls and side dams parallel to one another forming a pool between the casting rolls and side dams. A side dam support is provided that applies a compression force on at least one of the side dams at a compression angle relative to the axis of the casting rolls.
    Type: Application
    Filed: April 3, 2012
    Publication date: November 1, 2012
    Applicant: CASTRIP, LLC
    Inventors: Katsumi Nakayama, Atsushi Hirata, Hiroyuki Otsuka, Hisahiko Fukase
  • Publication number: 20120273157
    Abstract: A method to cover the exposures of a bath of molten steel by elements of casting powder in an ingot mold of a plant for the continuous casting of steel, including a step of subdividing the ingot mold into a desired number of zones, with each of which a covering movement is associated, the zones being determined and identified in a manner coordinated with the position of the snorkel and of the edge of the ingot mold, and a step of automated execution of one or more covering movements by elements of which the casting powder is distributed in a selected one of the zones, which movements, repeated in sequence according to a desired program, are selected from a group including pouring movements and throwing movements, at least on the basis of the reciprocal position of each of the zones and the snorkel.
    Type: Application
    Filed: January 14, 2011
    Publication date: November 1, 2012
    Applicant: Danieli Automation Spa
    Inventor: Ferruccio Della Vedova
  • Publication number: 20120222537
    Abstract: The present invention is a banjo tone ring with vertical sides (30) as opposed to the angled design of conventional banjo tone rings (120). The ring (30) of the present invention has specific height (h) to width (w) or thickness ratios and is within specific weight ranges for improved performance It vibrates much freer and thus raises the quality of musical tones from the banjo (10) to much higher aesthetic levels. Other embodiments also modify the musical tones for different sounds. Several novel embodiments of manufacturing methods are also described.
    Type: Application
    Filed: October 13, 2009
    Publication date: September 6, 2012
    Applicant: DEERING BANJO COMPANY, INCORPORATED
    Inventors: Charles Greg Deering, Jens H. Kruger, Philip Zanon
  • Patent number: 8220525
    Abstract: Disclosed is a method of predicting surface quality of a thin slab hot rolled coil. The method includes calculating the Cu equivalent (Cu eq.) of molten steel, applying the calculated Cu equivalent of the molten steel into an equation: 120×(Cu equivalent)2?6×(Cu equivalent) to calculate a surface crack index, and predicting the generation of surface defect of the thin slab hot rolled coil by the surface crack index. A method of producing the thin slab hot rolled coil using the same is also provided. The surface crack defect of the thin slab hot rolled coil can be predicted by calculating the Cu equivalent of the molten steel, and thus a thin slab which meets the quality standard demanded by a consumer can be provided, and this results in increased productivity and product reliability.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: July 17, 2012
    Assignee: Hyundai Steel Company
    Inventors: Wonjae Cho, Hyojoong Kwon, Kyoungho So, Kaeyoung Lee, Jutae Choi, Jinsoo Jang, Sukhyun Yoo
  • Publication number: 20120177935
    Abstract: Process producing ultra low carbon steel strip or sheet including producing a vacuum-degassed steel melt in a steelmaking step including a ladle treatment containing, by weight, at most 0.008% carbon; at most 0.008% nitrogen; at most 0.20% phosphorus; at most 0.020% sulphur; balance iron and inevitable impurities. Melt target oxygen content at end of ladle treatment of the melt is obtained by measuring the melt actual oxygen content followed by adding a suitable amount of aluminium in a suitable form to the melt to bind oxygen. Melt target oxygen content at the end of the ladle treatment is at most 80 ppm. Casting steel thus produced in a continuous casting process to form slab or strip. The process provides slab, strip or sheet of ultra low carbon steel containing at most 0.002% of acid soluble aluminium and at most 0.003% silicon and total oxygen content at most 100 ppm.
    Type: Application
    Filed: July 20, 2010
    Publication date: July 12, 2012
    Inventors: Ben Richards, Wouter Karel Tiekink, Maarten Arie De Haas
  • Patent number: 8210236
    Abstract: Exemplary embodiments of the invention provide a method of measuring the separation of moving confronting casting surfaces within a casting cavity of a casting apparatus. The method involves attaching at least one separation sensing device to a first one of a pair of confronting casting surfaces outside the casting cavity and then moving the casting surfaces to advance the sensing device(s) through the casting cavity while operating the device(s) to generate signals. The signals are monitored continuously or at regular intervals and converted to distance measurements representing separation of the surfaces at a plurality of positions through the casting cavity. Other exemplary embodiments provide apparatus for carrying out the method, and methods of measuring irregularities of casting belts or the like.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: July 3, 2012
    Assignee: Novelis Inc.
    Inventor: Daniel Godin
  • Patent number: 8201614
    Abstract: A method of controlling composition of a molten copper or a molten copper alloy during continuous cast, comprising the steps of determining continuously specific resistance of the molten copper or the molten copper alloy; calculating the composition of the molten copper or the molten copper alloy based on relationships between specific resistance of the molten copper or the molten copper alloy and each constituent which are preliminarily comprehended; and controlling the composition of the molten copper or the molten copper alloy based on the calculated composition. It is possible to consider temperature or content of dissolved oxygen to calculate the composition.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: June 19, 2012
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Hirokazu Yoshida, Tsukasa Takazawa, Shuji Tomimatsu
  • Patent number: 8176969
    Abstract: An apparatus for continuously casting thin strip includes a caster having a pair of casting rolls having a nip there between capable of delivering cast strip downwardly from the nip and an first enclosure capable of forming a protective atmosphere into which the strip can be formed in loop to extend over a plurality of rollers into pinch rolls with the strip having a strain of less than 0.4%, which may be provided by a plurality of rollers at entry of the strip into the pinch rolls to carry the strip into the pinch rolls, with at least a first entry roller having a diameter between 200 and 650 millimeters and being below a majority of other rollers.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: May 15, 2012
    Assignee: Nucor Corporation
    Inventors: Andrew Edward Dixon, Gary McQuillis, Rama Ballav Mahapatra, Leigh Wolley
  • Publication number: 20120048501
    Abstract: Disclosed are a method and a casting/rolling plant for producing hot-rolled metallic, particularly steel, strips (7) having great surface quality from slabs or flat thin bars (2, 2a) that are cast in a continuous casting process, descaling being performed based on a rotary descaling process. In order to take into account parameters which are not considered in prior art in addition to rotary descaling, the hydraulically oscillated permanent mold (9) travels along several different oscillation curves (16, 17, 18) while the oscillation marks are deep-cleaned by adjusting the oscillation pattern that is determined to be optimal for each casting material.
    Type: Application
    Filed: December 22, 2006
    Publication date: March 1, 2012
    Inventors: Christian Bilgen, Tilmann Böcher, Wolfgang Hennig, Jürgen Gaydoul
  • Patent number: 8122941
    Abstract: The present invention is directed to an aluminum alloy including aluminum as a basic component, silicon, copper, magnesium, iron, manganese, zinc, nickel and the like in a predetermined composition ratio, and a method of manufacturing of a vehicle cylinder liner having excellent wear resistance and heat resistance using the aluminum alloy. The method of manufacturing a vehicle cylinder liner includes the steps of: adding 50˜500 ppm of phosphorus (P) to the aluminum alloy while maintaining a temperature of the aluminum alloy at 700˜800° C. in a holding furnace, stabilizing the molten aluminum alloy including the phosphorus (P) for 30˜60 minutes to reform the molten aluminum alloy, and then continuous-casting the reformed molten aluminum alloy to form a round bar; hot-forging the round bar to forming a cylindrical liner; and machining an internal surface of the cylinder liner, with which a reciprocating piston comes into contact, to allow silicon particles to protrude.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: February 28, 2012
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Young Gi Kim, Seok Jun Kim, Hoon Mo Park
  • Patent number: 8104954
    Abstract: The present invention discloses a method and apparatus for measuring the temperature field on the surface of casting billet/slab, including: a thermal imager, an infrared radiation thermometer, a mechanical scanning unit, an image and data processing system; the thermal imager, the infrared radiation thermometer and the mechanical scanning unit are respectively connected to the image and data processing system; the infrared radiation thermometer is installed on the mechanical scanning unit and can measure the temperature of casting billet/slab surface by scanning; the thermal imager can measure the temperature of a certain area on the surface of casting billet/slab by thermal imaging.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: January 31, 2012
    Assignees: Northeastern University, Shenyang Taihe Metallurgy Measurement & Control Technology Co., Ltd.
    Inventors: Zhi Xie, Zhenwei Hu, Ying Ci, Da Zhang
  • Patent number: 7987896
    Abstract: In a method for guiding a cast material out of a casting chamber of a casting system, the cast material is discharged from a casting chamber by means of a succession of guiding rollers and rolling rollers. A rolling roller exerts a rolling force on the cast material to reduce the thickness of the cast material, whereas a guiding roller, which simply guides, exerts no rolling force on the cast material. At least the rolling rollers are driven by a drive, each drive applied under load. Because the rolling force of at least one rolling roller is detected, and the load of the drive of this rolling roller is controlled according to the detected rolling force, a method can be provided by which the stability of the casting speed is increased, and a significant reduction of the thickness of a cast material is achieved.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: August 2, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans-Joachim Schmidt
  • Patent number: 7984748
    Abstract: An apparatus for continuously casting thin strip includes a caster having a pair of casting rolls having a nip there between capable of delivering cast strip downwardly from the nip and an first enclosure capable of forming a protective atmosphere into which the strip can be formed in loop to extend over a plurality of rollers into pinch rolls with the strip having a strain of less than 0.4%, which may be provided by a plurality of rollers at entry of the strip into the pinch rolls to carry the strip into the pinch rolls, with at least a first entry roller having a diameter between 200 and 650 millimeters and being below a majority of other rollers.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: July 26, 2011
    Assignee: Nucor Corporation
    Inventors: Andrew Edward Dixon, Gary McQuillis, Rama Ballav Mahapatra, Leigh Wolley
  • Patent number: 7971630
    Abstract: A method for detecting a crater end of a continuously cast product, including installing an ultrasonic shear wave sensor for transmitting an ultrasonic shear wave to the continuously cast product and receiving the transmitted ultrasonic shear wave in a continuous casting machine, detecting based on variations of an ultrasonic signal received by the ultrasonic shear wave sensor that the crater end of the cast product is matched with the installed position of the ultrasonic shear wave sensor, calibrating a physical property value used in a calculation based on a heat condition equation such that the crater end computed based on the heat condition equation using casting conditions at that time is matched with the installed position of the ultrasonic shear wave sensor, and after the calibration, determining the crater end by the calculation based on the heat condition equation under respective casting conditions by using the calibrated physical property value.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: July 5, 2011
    Assignee: JFE Steel Corporation
    Inventors: Yukinori Iizuka, Jun Kubota, Koichi Tsutsumi
  • Publication number: 20100326618
    Abstract: Exemplary embodiments of the invention provide a method of measuring the separation of moving confronting casting surfaces within a casting cavity of a casting apparatus. The method involves attaching at least one separation sensing device to a first one of a pair of confronting casting surfaces outside the casting cavity and then moving the casting surfaces to advance the sensing device(s) through the casting cavity while operating the device(s) to generate signals. The signals are monitored continuously or at regular intervals and converted to distance measurements representing separation of the surfaces at a plurality of positions through the casting cavity. Other exemplary embodiments provide apparatus for carrying out the method, and methods of measuring irregularities of casting belts or the like.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 30, 2010
    Inventor: Daniel Godin
  • Publication number: 20100319873
    Abstract: The invention relates to a continuous casting installation (20) including a strand guide having strand casting segments with rollers (2) for guiding a cast strand, wherein at least one of the strand casting segments (22, 23, 24, 25, 26, 27) is formed as a measurement segment, wherein there is provided at least one measurement point for direct or indirect determination of a force acting on one or several rollers (2), wherein further the at least one measurement point is provided on a support housing (30), preferably between the support and the segment frame of strand casting segment, and there is provided a data processing unit that based on data of the at least one measurement point determines the solidification states of the cast strand.
    Type: Application
    Filed: December 23, 2008
    Publication date: December 23, 2010
    Inventors: Ina Huellen, Andreas Runge, Holger Beyer-Steinhauer, Markus Reifferscheid
  • Publication number: 20100307711
    Abstract: A method of controlling composition of a molten copper or a molten copper alloy during continuous cast, comprising the steps of determining continuously specific resistance of the molten copper or the molten copper alloy; calculating the composition of the molten copper or the molten copper alloy based on relationships between specific resistance of the molten copper or the molten copper alloy and each constituent which are preliminarily comprehended; and controlling the composition of the molten copper or the molten copper alloy based on the calculated composition. It is possible to consider temperature or content of dissolved oxygen to calculate the composition.
    Type: Application
    Filed: November 28, 2008
    Publication date: December 9, 2010
    Inventors: Hirokazu Yoshida, Tsukasa Takazawa, Shuji Tomimatsu
  • Publication number: 20100282431
    Abstract: A measuring system for measuring the strand condition of a continuous casting machine, the system comprising a plate member mounted on a caster chain (10) in use, the plate member (12) having an edge (14) that protrudes outwardly from one surface (13) of the caster chain (10); a pivotally mounted arm (16) capable of protruding outwardly from the opposing surface (17) of the caster chain (10); and means to determine the distance between the tip (18) of the arm (16) and the plate edge (14) at any given interval during use.
    Type: Application
    Filed: November 23, 2007
    Publication date: November 11, 2010
    Applicant: Sarclad Limited
    Inventor: Richard Cowlishaw
  • Publication number: 20100276110
    Abstract: A continuous casting plant in particular for long steel products is provided with a mould (1), from which a cast strand (2) is continuously cast. The cast strand (2) is guided along a, in particular curved, guideway formed by guide rollers (11, 12, 13, 14) arranged one after the other, and at the same time in a cooling chamber having spray members. The guide rollers (12, 13, 14) and/or the spray members are contained in a plurality of centring modules (10) or spray modules (3) arranged one after the other and are adjustable in a controlled manner substantially concentrically with respect to the desired axis of the cast strand. As a result, on the one hand, the risk of thermally overloading the rollers and damaging the strand surface is considerably reduced and symmetrical cooling is ensured.
    Type: Application
    Filed: January 14, 2008
    Publication date: November 4, 2010
    Applicant: SMS CONCAST AG
    Inventors: Franz Kawa, Christian Dratva
  • Publication number: 20100163206
    Abstract: A method for detecting a crater end of a continuously cast product, including installing an ultrasonic shear wave sensor for transmitting an ultrasonic shear wave to the continuously cast product and receiving the transmitted ultrasonic shear wave in a continuous casting machine, detecting based on variations of an ultrasonic signal received by the ultrasonic shear wave sensor that the crater end of the cast product is matched with the installed position of the ultrasonic shear wave sensor, calibrating a physical property value used in a calculation based on a heat condition equation such that the crater end computed based on the heat condition equation using casting conditions at that time is matched with the installed position of the ultrasonic shear wave sensor, and after the calibration, determining the crater end by the calculation based on the heat condition equation under respective casting conditions by using the calibrated physical property value.
    Type: Application
    Filed: January 26, 2010
    Publication date: July 1, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Yukinori Iizuka, Jun Kubota, Koichi Tsutsumi
  • Patent number: 7740051
    Abstract: A method for detecting a crater end of a continuously cast product including installing an ultrasonic shear wave sensor for transmitting an ultrasonic shear wave to a cast product and receiving the transmitted ultrasonic longitudinal wave and an ultrasonic longitudinal wave sensor for transmitting an ultrasonic longitudinal wave to the cast product and receiving the transmitted ultrasonic longitudinal wave at the same position in a continuous casting machine or at positions apart from each other in a casting direction, but at the same position in a transverse direction of the cast product, detecting based on variations of an ultrasonic signal received by the ultrasonic shear wave sensor that the crater end of the cast product is matched with the installed position of the ultrasonic shear wave sensor, calibrating a calculation formula for determining the crater end and determining the crater end.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 22, 2010
    Assignee: JFE Steel Corporation
    Inventors: Yukinori Iizuka, Jun Kubota, Koichi Tsutsumi
  • Publication number: 20100132910
    Abstract: A method for the detection and classification of surface defects on continuously cast products using topographical information about the appearance of continuously cast surface defects and/or flaws are determined with respect to their exact position, evaluated with respect to their location and dimensions, and eliminated in accordance with the evaluation prior to further machining of the product, or are prevented by optimizing the process. The defects and/or flaws on the slab surface of the continuously cast preliminary product are detected and are stored with respect to their exact position and a detection of defects and/or flaws on the finished product is carried out and stored with respect to their exact position, and in that the information from the preliminary product is then compared with the information from the surface inspection on the finished product.
    Type: Application
    Filed: April 2, 2008
    Publication date: June 3, 2010
    Applicant: SMS Siemag AG
    Inventors: Dieter Rosenthal, Stephan Schulze, Ingo Schuster, Peter Sudau, Rainer Fackert, Andreas Weinert, Wilfried Schumacher
  • Patent number: 7549797
    Abstract: The invention provides a temperature measurement system including a temperature sensor and means for biasing the temperature sensor in the direction of a thermal energy source in response to receiving thermal energy from the source. The invention also provides a continuous casting system including at least one temperature sensor disposed in the secondary cooling region and means for biasing the temperature sensor in the direction of the strand of metal in response to receiving thermal energy from the strand of metal.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: June 23, 2009
    Assignee: Rosemount Aerospace Inc.
    Inventor: Douglas C. Myhre
  • Patent number: 7543628
    Abstract: The invention relates to a method for predicting and controlling the castability of liquid steel. According to said method, the chemical composition of a melt to be cast is analyzed, an alloy calculation is carried out, alloy elements and/or additions are determined in order to obtain defined material characteristics of the steel, and operating diagrams are drawn up for further treatment of the melt. The interactions of the alloy and/or addition elements, which influence the castability, are taken into account during the alloy calculation as supplemental conditions.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: June 9, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Matschullat, Hans-Jürgen Oeynhausen, Klaus Pronold, Hans-Herbert Welker
  • Patent number: 7537045
    Abstract: The invention relates to a method of precise positioning of a number of cooperating cylinder or roller elements (2, 3, 4) of a roller or casing installation (1) relative to each other.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: May 26, 2009
    Assignee: SMS Demag AG
    Inventors: Horst Von Wyl, Ulrich Zenz, Frank Moensters
  • Publication number: 20090107589
    Abstract: Disclosed are a method and a production line for manufacturing metal strips made of copper or copper alloys by means of casting and rolling. In order to lower the investment cost and operating expenses therefor, the melt (2) is cast into a copper strip (4) in a vertical and/or horizontal continuous strip casting process (3), and the hot copper strip (4) is cleaned by milling (5) the top and bottom face (5a, 5b) thereof, is subjected to a cold rolling process (6) and is prepared for shipping, or is subjected to an inspection (12) and then prepared for shipping after being annealed (7), pickled (8), washed (9), dried (10), and optionally temper rolled (11).
    Type: Application
    Filed: July 6, 2006
    Publication date: April 30, 2009
    Applicant: SMS DEMAG AG
    Inventors: Hans-Peter Richter, Ludwig Weingarten, Hartmut Pawelski, Rainer Link, Wolfheinrich Muller
  • Patent number: 6845286
    Abstract: A method for detecting roller irregularities during on-line continuous casting of a metal comprises; i) continuously monitoring the changes in the mould level over time; ii) identifying large periodic influences affecting the mould level versus time function and their frequency, iii) comparing the frequency of the periodic influences of step ii) with predicted frequency harmonics based on a normal operation of the casting process and highlighting by comparison of the predicted and actual frequencies characteristics indicative of irregularities in roller behavior.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: January 18, 2005
    Assignee: Corus UK Limited
    Inventor: Philip Neill Hewitt
  • Publication number: 20040168749
    Abstract: The present invention provides a low carbon steel sheet and a low carbon steel slab on which formation of surface defects can be surely prevented by preventing aggregation of inclusions in the molten steel and finely dispersing inclusions in the steel sheet or slab, and a process for producing the steel sheet and slab. The present invention provides a process comprising the steps of decarburizing a molten steel so as to produce a carbon concentration of up to 0.01% by mass, pre-deoxidizing the molten steel by adding Al thereto so as to produce a dissolved oxygen concentration from 0.01 to 0.04% by mass, adding thereto Ti and at least La and/or Ce, and casting the molten steel, and a steel sheet and a steel slab obtained by the process.
    Type: Application
    Filed: December 22, 2003
    Publication date: September 2, 2004
    Inventors: Katsuhiro Sasai, Wataru Ohashi, Tooru Matsumiya, Yoshiaki Kimura, Junji Nakashima
  • Patent number: 6539273
    Abstract: A continuous caster is controlled by a method anticipating the liquidus temperature in the mold of the caster to prevent premature solidification. The temperature in the tundish is measured and based upon the tundish temperature and the resistance time of the molten metal in the tundish, an equivalent liquidus temperature window is defined and the speed of the continuous caster is controlled to maintain this window of operation of the tundish.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: March 25, 2003
    Assignee: SMS Schloemann-Siemag AG
    Inventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Lothar Parschat, Michael Vonderbank, Erwin Wosch
  • Publication number: 20020185254
    Abstract: A method for detecting a seized or still standing roller in a track of rollers in a continuous casting machine, in which each roller is rotatably mounted in supporting members and is arranged with its axis substantially perpendicular to the longitudinal extent of the track so that the rollers are arranged to transport elongated material produced in the machine. The method includes measuring a load exerted on at least one supporting member of each roller, with the load being substantially parallel with the extent of the track. The existence of a seized or still standing roller is established when the load deviates from a predetermined value by virtue of a force induced on the roller by seizure or stoppage of the roller at the contact with the transported material.
    Type: Application
    Filed: May 22, 2002
    Publication date: December 12, 2002
    Inventor: Hakan Lindgren
  • Publication number: 20020179449
    Abstract: A sacrificial plastic mold having an electroplatable backing is provided as are methods of making such a mold via the infusion of a castable liquid formulation through a porous metal substrate (sheet, screen, mesh or foam) and into the features of a micro-scale master mold. Upon casting and demolding, the porous metal substrate is embedded within the cast formulation and projects a plastic structure with features determined by the mold tool. The plastic structure provides a sacrificial plastic mold mechanically bonded to the porous metal substrate, which provides a conducting support suitable for electroplating either contiguous or non-contiguous metal replicates. After electroplating and lapping, the sacrificial plastic can be dissolved, leaving the desired metal structure bonded to the porous metal substrate. Optionally, the electroplated structures may be debonded from the porous substrate by selective dissolution of the porous substrate or a coating thereon.
    Type: Application
    Filed: January 17, 2002
    Publication date: December 5, 2002
    Inventors: Linda A. Domeier, Alfredo M. Morales, Marcela G. Gonzales, Patrick N. Keifer
  • Patent number: 5927375
    Abstract: Process for detecting defects during continuous casting between rolls where, during casting, a signal depending on the rolls separating force (RSF) is measured, the signal being separated into various harmonic components, the result of the comparison of the harmonic components thus obtained with reference harmonics being representative of a defective status of the rolls, this defective status of the rolls enabling various rules to be defined for the execution of the process.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: July 27, 1999
    Assignees: Usinor of Puteaux, Thyssen Stahl Aktiengesellschaft of Duisburg
    Inventors: Jean-Michel Damasse, Olivier Salvado
  • Patent number: 5884685
    Abstract: A rapid analysis device for analyzing nonmetallic inclusions in steel by a cold crucible method is combined with a mathematical model, and the quality of cast steel is predicted online by simulating the behavior. of the nonmetallic inclusions by calculation. Further, continuous casting process variables are controlled to minimize the amount of nonmetallic inclusions in the cast steel.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: March 23, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Takehiko Toh, Makoto Tanaka, Eiichi Takeuchi, Takeo Inomoto
  • Patent number: 5873404
    Abstract: The present invention provides novel methods and apparatus for continuously casting molten metal in a block caster. In accordance with the present invention, novel track and drive systems are provided for reducing imperfections that can be created in a cast by movement of a beam chain through a casting cycle.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: February 23, 1999
    Assignee: Lauener Engineering, Ltd.
    Inventors: Erich Luginbuhl, Michel Meyer, Rudolf Roder, Marcel Witschi, Ernst Zurcher
  • Patent number: 5850871
    Abstract: An improved continuous casting mold and foot guide assembly includes a mold having a casting passage defined therein, a frame member, mounting structure for mounting the frame member to the mold for relative movement toward and away from an axis of the casting passage, and a strand support member for providing support to a strand of continuously cast material as it emerges from the casting passage. Biasing structure is provided for biasing the frame member toward the axis of the casting passage and, advantageously, is positioned so as not to occupy space that is behind the frame member. As a result, the assembly is compatible with all models of casting machines and will be less susceptible to degradation as a result of radiant heat and steam that is emitted from the strand during operation. In addition, a load cell is provided for monitoring the amount of relative force between the frame member and the strand during operation.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: December 22, 1998
    Assignee: AG Industries, Inc.
    Inventor: James Bernard Sears, Jr.
  • Patent number: 5677844
    Abstract: The occurrence of porosity defects in solidifying metal can be predicted by a computer simulation numerically analyzing the solidification process of molten metal comprising (1) dividing a mold and a mold cavity into a plurality of elements; (2) providing each of the elements with material properties of casting metal and mold, and process variables as initial data; (3) calculating a liquid fraction of each of the elements in successive predetermined time increments to examine whether nor not each of the elements is in solid-liquid coexisting zone; (4) calculating pressure gradients between each of elements in the solid-liquid coexisting zone and neighboring elements thereof by numerically analyzing an interdendritic flow of the molten metal; (5) calculating gas pressure in the molten metal in each of elements in the solid-liquid coexisting zone; (6) comparing the gas pressure with an equilibrium pressure, and calculating a porosity amount for each of elements where the gas pressure is higher than the equilibr
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: October 14, 1997
    Assignee: Hitachi Metals, Ltd.
    Inventor: Kimio Kubo
  • Patent number: 5533565
    Abstract: In a mold oscillation device for making oscillation of a mold used in a continuous casting machine, an acceleration sensor (22) detects the oscillation to produce an oscillation detection signal representative of said oscillation. The oscillation detection signal has a particular waveform. Responsive to the oscillation detection signal, a signal producing circuit (30) produces an adjusting signal with reference to the particular waveform. With reference to the adjusting signal, a control unit (16) controls the oscillation. In order to produce the adjusting signal, it is preferable that the signal producing circuit carries out a frequency analysis as regards the particular waveform.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: July 9, 1996
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Kazuho Kodaira, Yasuhito Itoh, Tetsuya Watanabe