Patents Assigned to Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel
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Publication number: 20220219266Abstract: The present invention relates to a flux-cored wire for positive polarity gas-shielded arc welding use, in which a flux contains a metal powder and also contains BaF2 and SrF2 and AlF3 and/or CaF2 as fluorides wherein the content of BaF2 is 1.0 to 4.5%, the content of SrF2 is 2.0% or less, the content of CaF2 is 0.45% or less and the content of AlF3 is 0.70% or less, at least one of metal elements constituting the flux and the fluorides is a strong deoxidizing metal element having a specified standard formation Gibbs energy, and the content of each of an oxide and a carbonate in the flux is 0.5% or less.Type: ApplicationFiled: May 1, 2020Publication date: July 14, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Naoki MUKAI, Shun IZUTANI, Takashi YASHIMA
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Publication number: 20220205730Abstract: A laminated fluid warmer includes: a laminate including a target fluid layer having a plurality of target fluid channels through which a warming target fluid flows, and a warming fluid layer that is laminated on the target fluid layer and has a plurality of warming fluid channels through which a warming fluid for warming the target fluid layer flows; and a collection device that collects at least a part of the warming fluid accumulated in the plurality of warming fluid channels. The collection device includes a storage portion that receives the warming fluid flowing out from the warming fluid channel when collecting the warming fluid.Type: ApplicationFiled: November 24, 2021Publication date: June 30, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yohei KUBO, Koji NOISHIKI, Yasutake MIWA, Masataka AZUMA
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Publication number: 20220196151Abstract: 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: ApplicationFiled: November 24, 2021Publication date: June 23, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Toru OKADA, Tomohiro OTSUKA
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Publication number: 20220193833Abstract: 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: ApplicationFiled: May 1, 2020Publication date: June 23, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Naoki MUKAI, Shun IZUTANI
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Publication number: 20220184813Abstract: 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: ApplicationFiled: February 14, 2020Publication date: June 16, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoshiya TAKEMURA, Yasuyuki SAITO, Youzhuo JIAO
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Publication number: 20220177985Abstract: 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: ApplicationFiled: March 26, 2020Publication date: June 9, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Shoji IKUTA, Akito KASAI
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Publication number: 20220176492Abstract: 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: ApplicationFiled: February 23, 2022Publication date: June 9, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kyohei MAEDA, Reiichi SUZUKI
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Publication number: 20220178620Abstract: 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: ApplicationFiled: May 8, 2020Publication date: June 9, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Tomohiro OZONO, Koji NOISHIKI, Nobumasa ICHIHASHI
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Publication number: 20220168835Abstract: 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: ApplicationFiled: February 25, 2020Publication date: June 2, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Reiichi SUZUKI, Kyohei MAEDA
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Publication number: 20220154709Abstract: 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: ApplicationFiled: October 14, 2021Publication date: May 19, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Tomohiro OTSUKA, Naofumi KANEI
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Publication number: 20220154313Abstract: 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: ApplicationFiled: March 5, 2020Publication date: May 19, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Takahiro SHIKAMA, Shinji YOSHIHARA, Misuzu YAMAMOTO, Yuki TANAKA, Ryo UNOKI, Takahiro OZAWA
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Publication number: 20220152726Abstract: 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: ApplicationFiled: March 19, 2020Publication date: May 19, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Mai YOSHIZAWA, Tetsu IWASE
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Publication number: 20220134464Abstract: A weld line data generation device generates weld line data specifying a portion to be welded by a welding robot.Type: ApplicationFiled: February 4, 2020Publication date: May 5, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Youzhuo JIAO, Kenji SADAHIRO
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Publication number: 20220134489Abstract: 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: ApplicationFiled: February 13, 2020Publication date: May 5, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoshimasa MURANISHI, Hiromi OYAMADA, Hideaki TAKAUCHI, Takeo MIYAMURA, Shigenobu NAMBA
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Publication number: 20220134486Abstract: 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: ApplicationFiled: March 23, 2020Publication date: May 5, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiromi OYAMADA, Hideaki TAKAUCHI, Yoshimasa MURANISHI, Shigenobu NAMBA, Takeo MIYAMURA
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Publication number: 20220126388Abstract: 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: ApplicationFiled: January 4, 2022Publication date: April 28, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD)Inventors: Shinji Sato, Takeshi Yamada, Takemasa Yamasaki
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Publication number: 20220120263Abstract: 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: ApplicationFiled: September 28, 2021Publication date: April 21, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Tomohiro OTSUKA, Naofumi KANEI
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Publication number: 20220119899Abstract: 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: ApplicationFiled: February 17, 2020Publication date: April 21, 2022Applicants: 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
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Publication number: 20220120264Abstract: 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: ApplicationFiled: September 28, 2021Publication date: April 21, 2022Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Tomohiro OTSUKA, Naofumi KANEI
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Publication number: 20220111458Abstract: 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: ApplicationFiled: January 8, 2020Publication date: April 14, 2022Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventor: Reiichi SUZUKI
