Patents Assigned to Kabushiki Kaisha Kobe Seiko Sho
  • Publication number: 20220196151
    Abstract: The piston ring unit includes a plurality of piston rings and an inner contact ring. A plurality of piston rings are disposed adjacent to each other in an axial direction of the piston such that joints of plurality of the piston rings do not overlap with each other in the axial direction. An inner contact ring is interposed between an outer circumferential surface of the piston and an inner circumferential surface of the piston ring in a state where the inner contact ring extends over all of the plurality of piston rings in the axial direction, and is disposed such that an opening of the inner contact ring does not overlap with the joint of the at least one piston ring as viewed in a radial direction of the piston.
    Type: Application
    Filed: November 24, 2021
    Publication date: June 23, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Toru OKADA, Tomohiro OTSUKA
  • Publication number: 20220193833
    Abstract: The present invention relates to a flux-cored wire which can be used for straight-polarity gas-shielded arc welding, wherein a flux contains one or several types of metal compound powders and, when one or several metal elements constituting the metal compound powders are formed into stable compounds under a high-temperature environment, the relationship between the weighted geometric mean value (?) of the work functions of the stable compounds and the wire diameter (D) of the flux-cored wire satisfies the following formula: {1.00????0.0908D2+0.5473D+1.547}.
    Type: Application
    Filed: May 1, 2020
    Publication date: June 23, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Naoki MUKAI, Shun IZUTANI
  • Publication number: 20220184813
    Abstract: A welding system configured to weld a workpiece by using a welding device and a positioner includes a control device configured to control the welding device and the positioner. The positioner includes a workpiece position setting mechanism having reference position information, and at least one holding mechanism configured to hold the workpiece. The control device includes a positioner position calculation means for calculating a position of the holding mechanism when holding the workpiece based on the reference position information provided from the workpiece position setting mechanism and workpiece information inputted into the control device in advance.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 16, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoshiya TAKEMURA, Yasuyuki SAITO, Youzhuo JIAO
  • Publication number: 20220178620
    Abstract: A fluid flow channel device includes a main body and a non-ceramic sub-body. The main body has a plurality of internal flow channels, and inlets and outlets thereof are arranged so as to be exposed on an outer side surface. The sub-body has a fluid supply path and a fluid recovery path. A supply port of the fluid supply path is arranged to face the inlets of the plurality of internal flow channels. A recovery port of the fluid recovery path is arranged to face the outlets of the plurality of internal flow channels. By disposing the supply port and the recovery port for transferring the fluid to and from the plurality of internal flow channels in the sub-body, it is possible to prevent a large thermal stress from being applied to the main body.
    Type: Application
    Filed: May 8, 2020
    Publication date: June 9, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Tomohiro OZONO, Koji NOISHIKI, Nobumasa ICHIHASHI
  • Publication number: 20220176492
    Abstract: A method for manufacturing a joint structure of dissimilar materials, the method includes: forming a low-temperature thermal spray coating on at least a part of a surface of an aluminum or aluminum alloy material by low-temperature thermal spraying a metal powder of at least one metal selected from the group consisting of pure iron, carbon steel, stainless steel, nickel, a nickel alloy, cobalt, and a cobalt alloy; overlapping the aluminum or aluminum alloy material and a steel material such that the low-temperature thermal spray coating and the steel material face each other; and joining the aluminum or aluminum alloy material and the steel material by laser a welding from a steel material side, in which the joining is performed under welding conditions in which a fusion zone is formed in the steel material, the low-temperature thermal spray coating, and the aluminum or aluminum alloy material.
    Type: Application
    Filed: February 23, 2022
    Publication date: June 9, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kyohei MAEDA, Reiichi SUZUKI
  • Publication number: 20220177985
    Abstract: A method for a blast furnace includes pulverizing coal to make pulverized coal, and pulverizing iron ore to make pulverized iron ore, and injecting the pulverized coal and the pulverized iron ore from a tuyere. A loss on ignition of the iron ore is greater than or equal to 9% by mass and less than or equal to 12% by mass, an injection rate of the pulverized coal is greater than or equal to 150 kg/tp, and an injection rate of the pulverized iron ore is greater than or equal to 2.5 kg/tp and less than or equal to 50.0 kg/tp.
    Type: Application
    Filed: March 26, 2020
    Publication date: June 9, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shoji IKUTA, Akito KASAI
  • Publication number: 20220168835
    Abstract: A method for manufacturing a dissimilar metal joint product includes: spraying a metal powder capable of being joined to a steel material to at least a part of a surface of an aluminum or aluminum-alloy material at a low temperature and at a high speed to form a coating thereon; disposing the aluminum or aluminum-alloy material and the steel material such that the coating and the steel material face each other; and performing brazing using a brazing material or welding using a welding material between the coating and the steel material.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 2, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Reiichi SUZUKI, Kyohei MAEDA
  • Publication number: 20220154709
    Abstract: A compressor includes: a cylinder main body; a valve block; a cylinder head; a first seal group composed of a plurality of seal parts; and a second seal group composed of a plurality of seal parts. The valve block includes a guide-out flow passage which opens between the seal parts composing the first seal group and opens between the seal parts composing the second seal group. The guide-out flow passage is linked to an outer pipe for conveying a leaked gas from a compression chamber to a predetermined place.
    Type: Application
    Filed: October 14, 2021
    Publication date: May 19, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Tomohiro OTSUKA, Naofumi KANEI
  • Publication number: 20220154313
    Abstract: A door beam of a motor vehicle includes a 7000 series aluminum alloy extruded material, the 7000 series aluminum alloy extruded material including Zn: 7.5 mass % to 9.0 mass %, Mg: 1.3 mass % to 2.0 mass %, Cu: 0.1 mass % to 0.7 mass %, Si: 0.15 mass % or less, Fe: 0.3 mass % or less, Ti: 0.005 mass % to 0.2 mass %, and at least one of Mn, Cr, and Zr: 0.1 mass % to 0.5 mass %, in which contents of Mn, Cr and Zr satisfy Mn: 0.3 mass % or less, Cr: 0.25 mass % or less, and Zr: 0.25 mass %, respectively, with the remainder being Al and impurities. A Fe-based crystallized product is contained, and an average Cu content of the Fe-based crystallized product is 5.0 mass % or less.
    Type: Application
    Filed: March 5, 2020
    Publication date: May 19, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takahiro SHIKAMA, Shinji YOSHIHARA, Misuzu YAMAMOTO, Yuki TANAKA, Ryo UNOKI, Takahiro OZAWA
  • Publication number: 20220152726
    Abstract: This spot welding method for an aluminum material comprises: a processing step in which, in a plan view, a circular emboss expanded in a direction of superposition on a second aluminum plate side is formed at a position-to-be-welded of a first aluminum plate; an arrangement step in which positions-to-be-welded are superimposed while the expansion side of the emboss faces the second aluminum plate, and the positions-to-be-welded are arranged between a pair of electrodes; a pressing step in which the superimposed aluminum plates are pinched between the electrodes, and a central side excluding a peripheral edge of the emboss is pressed; and an electrification step of performing pressing and electrification. An electrode having a tip diameter larger than the diameter of a root part of the expansion part of the emboss is used.
    Type: Application
    Filed: March 19, 2020
    Publication date: May 19, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Mai YOSHIZAWA, Tetsu IWASE
  • Publication number: 20220134489
    Abstract: A welding material may be suitable for high-Cr ferritic heat-resistant steels, and may suppress ?-ferrite occurrence, i.e., a soft structure, thereby improving the toughness, and enabling the achievement of a welded metal that has good cracking resistance and strength at high temperatures. Such welding materials for high-Cr ferritic heat-resistant steels may contain C, Si, Mn, S, Co, V, Nb, W, N, and O, respectively within specific ranges and limits Ni and P respectively to specific ranges, while containing from 8.0% by mass to 9.5% by mass (inclusive) of Cr and from 0.02% by mass to 0.20% by mass (inclusive) of Mo and additionally limiting Cu to less than 0.05% by mass, with the balance being made up of Fe and unavoidable impurities.
    Type: Application
    Filed: February 13, 2020
    Publication date: May 5, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoshimasa MURANISHI, Hiromi OYAMADA, Hideaki TAKAUCHI, Takeo MIYAMURA, Shigenobu NAMBA
  • Publication number: 20220134464
    Abstract: A weld line data generation device generates weld line data specifying a portion to be welded by a welding robot.
    Type: Application
    Filed: February 4, 2020
    Publication date: May 5, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Youzhuo JIAO, Kenji SADAHIRO
  • Publication number: 20220134486
    Abstract: Provided is a covered electrode for high-Cr ferritic heat-resistant steels with which it is possible to obtain weld metal that has the toughness required for weld parts and has excellent high temperature strength. The covered electrode for high-Cr ferritic heat-resistant steels includes a steel core and a coating agent that coats the core. The covered electrode comprises C, Si, Mn, Ni, Cr, Mo, V, Co, B, Nb, W, N, and Fe each in a predetermined range in the total mass of the covered electrode, contains a slag forming agent, and has a total of the W content and the Co content of 2.8 mass % or more.
    Type: Application
    Filed: March 23, 2020
    Publication date: May 5, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiromi OYAMADA, Hideaki TAKAUCHI, Yoshimasa MURANISHI, Shigenobu NAMBA, Takeo MIYAMURA
  • Publication number: 20220126388
    Abstract: An additively manufactured object formed by depositing weld bead layers, each of the weld bead layers being obtained by melting and solidifying a filler metal made of a mild steel, the additively manufactured object includes a plurality of the weld bead layers having a ferrite phase with an average grain diameter of 11 ?m or less in a part except for a surface oxide film.
    Type: Application
    Filed: January 4, 2022
    Publication date: April 28, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD)
    Inventors: Shinji Sato, Takeshi Yamada, Takemasa Yamasaki
  • Publication number: 20220119899
    Abstract: A blast furnace operation method according to one aspect of the present invention includes: a process of acquiring a correlation between a carbon consumption in reducing gas and a reduction Input?C in specific carbon consumption caused by blowing the reducing gas into the blast furnace per molar ratio C/H of carbon atoms to hydrogen atoms in the reducing gas; a process of determining a carbon consumption in the reducing gas where the reduction Input?C in specific carbon consumption is a predetermined target value or higher on the basis of the correlation acquired per C/H; and a process of adjusting the amount of the reducing gas blown into the blast furnace on the basis of the determined carbon consumption in the reducing gas and the carbon proportion in the reducing gas.
    Type: Application
    Filed: February 17, 2020
    Publication date: April 21, 2022
    Applicants: NIPPON STEEL CORPORATION, JFE Steel Corporation, Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), NIPPON STEEL ENGINEERING CO., LTD.
    Inventors: Hiroshi SAKAI, Koki NISHIOKA, Kaoru NAKANO
  • Publication number: 20220120263
    Abstract: A compression stage includes a cylinder, a piston, a first piston ring group, and a second piston ring group. The cylinder includes a first cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and the first piston ring group flows, a second cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and the second piston ring group flows, and an intermediate part disposed between the first cooling channel and the second cooling channel. A communication channel is connected to the intermediate part and a connection pipe, and guides a hydrogen gas leaking from a compression chamber through the first piston ring group to the intermediate part, to the outside of the cylinder.
    Type: Application
    Filed: September 28, 2021
    Publication date: April 21, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Tomohiro OTSUKA, Naofumi KANEI
  • Publication number: 20220120264
    Abstract: A cylinder in a compression stage is provided with a first cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and a first piston ring group flows, a second cooling channel through which a cooling fluid for absorbing heat generated between the cylinder and a second piston ring group flows, and a through hole penetrating a side wall of the cylinder in an intermediate part between the first cooling channel and the second cooling channel A hydrogen gas leaking from a compression chamber to the intermediate part through between the cylinder and a piston and then guided to a leak line. The leak line includes a piping part and a volume expansion unit in which volume in a predetermined distance range is larger than volume of the piping part at the same distance range as the predetermined distance range.
    Type: Application
    Filed: September 28, 2021
    Publication date: April 21, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Tomohiro OTSUKA, Naofumi KANEI
  • Publication number: 20220111462
    Abstract: In an arc-tracking welding method and a welding device of the present invention, a deviation amount between a weaving center and a welding line is obtained based on a first relationship and a second relationship. The first relationship is a relationship between a weaving position and any one element of three electrical first to third elements related to Ohm's law, the relationship being obtained based on a physical model of an arc welding phenomenon and being associated with the deviation amount. The second relationship is a relationship between the weaving position and the element, the relationship being obtained based on the element in welding power.
    Type: Application
    Filed: September 17, 2021
    Publication date: April 14, 2022
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Yoshiharu NISHIDA, Tsutomu ONE, Tatsuya FUJII
  • Publication number: 20220111458
    Abstract: A method for joining a plated steel sheet includes forming a plurality of protrusions, overlapping a first steel sheet, and performing arc welding, by which first and second steel sheets, at least one of which is a plated steel sheet, are arc welded. In the forming, the plurality of protrusions that is substantially perpendicular to an edge portion of the first steel sheet and is positioned along the edge portion is formed in an overlapping surface of the first steel sheet. In the overlapping, the first and second steel sheets are overlapped such that the protrusions protrude in a direction toward an overlapping surface of the second steel sheet. In the performing the arc welding, an arc welding is performed linearly in the edge portion of the first steel sheet or second steel sheet.
    Type: Application
    Filed: January 8, 2020
    Publication date: April 14, 2022
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Reiichi SUZUKI
  • Patent number: 11300355
    Abstract: A boil-off gas supply device is provided with: a storage tank configured to store a liquefied gas; a first compression mechanism configured to suck in the boil-off gas of the liquefied gas stored in the storage tank and compress the sucked boil-off gas; a second compression mechanism configured to compress the boil-off gas after being compressed by the first compression mechanism; a discharge path in which the boil-off gas discharged from the second compression mechanism flows; a first drive source configured to drive the first compression mechanism; and a second drive source that is different from the first drive source and configured to drive the second compression mechanism.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: April 12, 2022
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Satoshi Tezuka, Katsuhiro Seyama, Kenji Nagura