Measuring, Sensing, Or Testing Patents (Class 148/215)
  • Publication number: 20150059930
    Abstract: A method for forming a profile having at least three consecutive concave surfaces in an internal surface of a metal part includes piercing the metal part to create at least three consecutive concave surfaces. First, second and third concave surfaces respectively have first, second and third radii of curvature. The second concave surface is between the first and third concave surfaces. The second radius of curvature is different from the first and third radii of curvature. The method includes carburizing the metal part, grinding the second concave surface, and linear broaching the first and third concave surfaces with an abrasive-covered broach. A method for forming a groove in a surface of a metal part includes broaching the surface to create a groove having a groove surface, carburizing the metal part, and broaching a portion of the groove surface with an abrasive-covered broach after carburizing the metal part.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventors: Xavier-Pierre AITCIN, Yan BOURGEOIS
  • Publication number: 20150047747
    Abstract: A surface treating method for a golf club head made of carbon steel basically has one nitriding step and two oxidizing steps. The method further has polishing, sandblasting and rinsing steps and so on processed prior to or between the basic steps, and then has polishing and oil immersing steps and so on processed after the basic steps. The finished golf club head has uniform dark appearance and also has good corrosion resistance and abrasion resistance. Furthermore, the surface of the finished golf club head does not peel off. Moreover, the method also has advantages including low pollution and low cost.
    Type: Application
    Filed: November 3, 2014
    Publication date: February 19, 2015
    Inventor: CHI-HUNG SU
  • Patent number: 8764915
    Abstract: In order to provide a further uniform carburizing treatment to an article to be treated, a carburizing treatment apparatus which performs carburizing treatment by heating the article to be treated in a treatment chamber, the inside of which is under reduced pressure and in a carburizing gas atmosphere, includes a temperature measurement means for measuring temperatures in a plurality of regions inside the treatment chamber and a temperature adjustment means for individually adjusting temperatures in the plurality of regions on the basis of measurement results of the temperature measurement means so that the article to be treated is given a uniform carburizing treatment.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: July 1, 2014
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventor: Kazuhiko Katsumata
  • Publication number: 20130008565
    Abstract: Described herein is a method that can be used for heat treating a metal in at least one of the following processes: carburizing, carbonitriding, nitrocarburizing, and neutral carbon potential annealing operations that are used in a 1 atmosphere pressure furnace and in an atmosphere that is oxygen free and comprises nitrogen and at least one hydrocarbon.
    Type: Application
    Filed: December 28, 2011
    Publication date: January 10, 2013
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Zbigniew Zurecki, Xiaolan Wang, Guido Plicht, John Lewis Green, Anna K. Wehr-Aukland
  • Patent number: 8293167
    Abstract: A system for treating metallic articles in an atmospheric furnace while injecting at least one fluid material within the furnace and/or in a catalyst bed connected to the furnace.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: October 23, 2012
    Assignee: Surface Combustion, Inc.
    Inventors: William J. Bernard, Ralph P. Poor, Garry W. Barbee, John W. Gottschalk
  • Patent number: 8128761
    Abstract: A carbonitriding method that can improve the nitrogen permeating rate to render the carbonitriding process effective is directed to carbonitriding a workpiece formed of steel that contains at least 0.8 mass % of carbon by heating in an atmosphere including ammonia, carbon monoxide, carbon dioxide and hydrogen. The method includes an atmosphere control step, and a heating pattern control step. The atmosphere control step includes an undecomposed NH3 partial pressure control step, a CO/CO2 partial pressure control step, and an H2 partial pressure control step. The undecomposed NH3 partial pressure control step, the CO/CO2 partial pressure control step and the H2 partial pressure control step are carried out such that the partial pressure of hydrogen in the heat treatment furnace is at least 0.1 atmospheric pressure and not more than 0.3 atmospheric pressure, and ? defined by the following equation (1) is at least 2.0 and not more than 6.0, in the atmosphere control step.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: March 6, 2012
    Assignee: NTN Corporation
    Inventor: Chikara Ohki
  • Patent number: 7967920
    Abstract: A method and measurement system for the control of an active charge surface in a low pressure carburizing process can avoid formation of by-products and achieve regular carburized layers. This can be achieved through sampling of outlet gas at a specified time and comparison with experimentally set model characteristics.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: June 28, 2011
    Assignees: Seco/Warwick S.A., Politechnika Lodzka
    Inventors: Piotr Kula, Józef Olejnik
  • Publication number: 20110067784
    Abstract: The invention relates to a process for the low-pressure carburisation of metal workpieces in an evacuable furnace, in which acetylene is added to the furnace atmosphere as the carburisation gas, wherein the partial pressure of the acetylene is varied intermittently and wherein the partial pressure of the acetylene in the furnace atmosphere is kept below 10 mbar. In order to specify a process for the low-pressure carburisation of metal workpieces that leads to an improvement, particularly with regard to the carburisation result, the invention proposes the use of a pot furnace as the furnace.
    Type: Application
    Filed: September 16, 2010
    Publication date: March 24, 2011
    Applicant: Hanomag Hartecenter GmbH
    Inventors: Winfried Gräfen, Karsten Seehafer, Friedrich Wilhelm Zur Weihen
  • Publication number: 20100154937
    Abstract: A carbonitriding method that can improve the nitrogen permeating rate to render the carbonitriding process effective includes an atmosphere control step (50), and a heating pattern control step (60). The atmosphere control step (50) includes an undecomposed NH3 partial pressure control step (51), and a CO/CO2 partial pressure control step (53). The undecomposed NH3 partial pressure control step (51) and the CO/CO2 partial pressure control step (53) are carried out in the atmosphere control step (50) such that ac* defined by the following equation (1) is at least 0.88 and not more than 1.27, and ? defined by equation (2) is at least 0.012 and not more than 0.
    Type: Application
    Filed: April 3, 2007
    Publication date: June 24, 2010
    Inventor: Chikara Ohki
  • Publication number: 20080302281
    Abstract: A system for treating metallic articles in an atmospheric furnace while injecting at least one fluid material within the furnace and/or in a catalyst bed connected to the furnace.
    Type: Application
    Filed: November 21, 2006
    Publication date: December 11, 2008
    Inventors: William J. Bernard, Ralph P. Poor, Garry W. Barbee, John W. Gottschalk
  • Publication number: 20080277029
    Abstract: A method and measurement system for the control of an active charge surface in a low pressure carburizing process can avoid formation of by-products and achieve regular carburized layers. This can be achieved through sampling of outlet gas at a specified time and comparison with experimentally set model characteristics.
    Type: Application
    Filed: March 31, 2008
    Publication date: November 13, 2008
    Applicant: SECO/WARWICK S.A.
    Inventors: Piotr Kula, Jozef Olejnik
  • Patent number: 6969430
    Abstract: This invention is directed to a process and apparatus for producing high productivity carburizing. A process is introduced that uses a gas mixture made up of CO, H2, CO2, H2O, CH4 and N2, such that the product of the % CO and % H2 is greater than about 1600; the ratio of CO/CO2 is greater than 10; and the ratio of H2/H2O is greater than about 10. The gas mixture is controlled for a short time. A reactor for generating a gas mixture for carburizing steel is also introduced. This reactor is composed of a cylindrically symmetric body; a first central tube containing electrical heating elements for gas flow; a second central tube concentrically disposed around the first central tube; and a plurality of catalyst beds disposed in an annular space in a segmented fashion around the second central tube.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: November 29, 2005
    Assignee: Praxair Technology, Inc.
    Inventors: Jaak Stefaan Van den Sype, Alan Russell Barlow, Edison Viotto
  • Patent number: 6635121
    Abstract: The invention relates to a method for controlling the decarburization of steel components in a furnace during heat treating processes. The concentration of CO2 and/or CO in the furnace is monitored in a first batch in order to determine periods of elevated CO2/CO concentrations, and inert gas is injected in subsequent batches during the previously determined periods of elevated CO2/CO concentrations.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: October 21, 2003
    Assignees: American Air Liquide, Inc., L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Yannick Rancon, Hunter Spoon
  • Patent number: 6612154
    Abstract: Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2(g) to water vapor H2O(g) in the atmosphere. The systems and methods use the process variable, e.g., to control the atmosphere, or to record, or display the process variable.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: September 2, 2003
    Assignee: Furnace Control Corp.
    Inventors: Robert N. Blumenthal, Andreas T. Melville
  • Patent number: 6547888
    Abstract: An iron-containing workpiece is case hardened by low temperature carburization during which one or more process steps—including adjusting the carburization temperature, adjusting the concentration of carburization specie in the carburization gas and reactivating the surfaces to be carburized—is carried out to enhance the overall rate and uniformity of carburization with minimized soot generation, whereby carburization can be completed faster than possible in the past.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: April 15, 2003
    Assignee: Swagelok Company
    Inventors: Peter C. Williams, Steven V. Marx
  • Publication number: 20020134467
    Abstract: There is provided an economical carburizing method and carburization apparatus capable of carrying out carburizing treatment with a quality as high as that in a normal case and a high reproducibility even if carburizing conditions differ from those in a normal case. A carburization apparatus for carrying out carburization in an atmosphere gas containing not more than 30% by volume of carbon monoxide under a pressure of 13 to 4,000 Pa has a carburizing chamber 3 for housing an object 4 to be treated; an oxygen sensor 20 for measuring an oxygen concentration in the atmosphere gas in the carburizing chamber 3 during carburization; and a mass flow controller 5 for adjusting a composition of the atmosphere gas in the carburizing chamber 3 according to a measurement result by the oxygen sensor 20.
    Type: Application
    Filed: January 11, 2002
    Publication date: September 26, 2002
    Inventors: Kazuki Kawata, Hatsuo Sato, Shigeta Asai, Yoshiyuki Sekiya
  • Publication number: 20020104587
    Abstract: A controlled nitrogen diffusion process is employed on a steel coil spring of a suspension system. One known process is that known as the Nitreg® process. Ammonia is introduced into a furnace atmosphere and nitrogen diffuses into the coil spring, creating a hardened diffusion zone which resists fatigue and fractures. The Nitreg® nitrogen diffusion process is a computer controlled menu driven process which continually monitors the process parameters. By regulating the nitriding potential, the monitored process parameters are automatically adjusted to achieve optimal results. The nitriding potential is the tendency of nitrogen to be absorbed by steel and is expressed as the ratio of the partial pressure of ammonia to the partial pressure of hydrogen. Additionally, the depth of the white compound layer can be regulated or eliminated, reducing distortions.
    Type: Application
    Filed: November 30, 2001
    Publication date: August 8, 2002
    Inventors: Leo Medeiros, Tom King
  • Patent number: 6106636
    Abstract: In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace. The quantity of a residual CH.sub.4, a partial pressure of the oxidization gas and a partial pressure of CO are measured. The quantity of each gas to be supplied into the furnace is controlled according to either one of the values of the partial pressures.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 22, 2000
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Takeshi Naito, Kouichi Ogihara, Akihiro Wakatsuki, Tadanori Nakahiro, Hideki Inoue, Yoshio Nakashima
  • Patent number: 6051080
    Abstract: The invention relates to a power roller used for a toroidal-type continuously variable transmission. This power roller has on its first side a groove for receiving a bearing, and the surface of the groove (bearing surface) has a carbon concentration which is not lower than that of the back surface of a second side opposed to the first side. The power roller has a hardened outer layer having first and second portions which are respectively defined by the bearing surface and the back surface. The first portion of the hardened outer layer has an effective depth which is not shallower than that of the second portion thereof. The power roller is prepared by the sequential steps of surface-hardening, quenching, and grinding. The surface-hardening process is one of carburizing and carbonitriding.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: April 18, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Nobuo Kino, Toshifumi Hibi
  • Patent number: 6051078
    Abstract: In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace, and the supply of the hydrocarbon series gas is stopped either when the quantity of a residual CH.sub.4 in the furnace is changed to increasing from decreasing, or when a partial pressure of oxygen in the furnace reaches a predetermined value.
    Type: Grant
    Filed: February 16, 1998
    Date of Patent: April 18, 2000
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Takeshi Naito, Kouichi Ogihara, Akihiro Wakatsuki, Tadanori Nakahiro, Hideki Inoue, Yoshio Nakashima
  • Patent number: 6017641
    Abstract: A coil spring made of an oil-tempered steel wire with internal hardness of more than Hv 550 in cross-section, the surface hardness of the oil-tempered steel wire being determined in an extent between Hv 420 in a minimum value and hardness defined by subtraction of Hv 50 from the internal hardness in a maximum value.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: January 25, 2000
    Assignees: Chuo Hatsujo Kabshiki Kaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Toshinori Aoki, Taisuke Nishimura, Takashi Otowa
  • Patent number: 5231645
    Abstract: In the continuous carburization furnace in which the temperature of the heaters can be controlled individually at every carburization processing position; carburization reference data at each carburization processing position is read; a temperature and carbon potential at each position at least during carburization and diffusion processes is detected; a carburized quantity of the processed member at each position is calculated with reference to the detected temperature and carbon potential; a carburization history is calculated by integrating the carburized quantity at each position of the carburization processed member, and a carburizing condition at a next carburization processing position is determined depending on a difference between the carburization history at the time of terminating the carburization process at each position of the carburization processed member and the carburization reference data at each position.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: July 27, 1993
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuo Uno, Makoto Sumitomo