Patents by Inventor Masao Kinefuchi
Masao Kinefuchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170182602Abstract: A laminated aluminum alloy sheet that includes a core material and a sacrificial material being clad on at least one side surface of the core material. The core material contains Mn: from 0.5 to 1.8 mass %, Si: from 0.4 to 1.5 mass % and Cu: from 0.05 to 1.2 mass %, and contains at least one member of Fe: 1.0 mass % or less and Ti: 0.3 mass % or less, with the remainder being Al and unavoidable impurities. The core material has a number density of dispersoids having a particle diameter of 0.01 to 0.5 um of from 20 to 80/um3.Type: ApplicationFiled: March 25, 2015Publication date: June 29, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Katsushi MATSUMOTO, Masao KINEFUCHI, Takahiro IZUMI
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Patent number: 9689060Abstract: This high-strength hot-rolled steel plate contains specific amounts of C, Si, Mn, Al, V and also Ti and/or Nb so as to fulfill C?12(V/51+Ti/48+Nb/93)>0.03, and the rest consists of iron and unavoidable impurities. Ferrite is the main microstructure, the remaining microstructure is one or more selected from the group consisting of bainite, martensite and retained austenite, wherein the average particle diameter of precipitated carbides (the total content of V, Ti and Nb is 0.02% or greater) in the ferrite is less than 6 nm.Type: GrantFiled: August 15, 2012Date of Patent: June 27, 2017Assignee: Kobe Steel, Ltd.Inventors: Toshio Murakami, Masao Kinefuchi, Hideo Hata
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Patent number: 9457416Abstract: A fillet weld joint of steel formed by arc welding, wherein a martensitic transformation starting temperature (Ms point) of a weld metal is 400° C. or above and 550° C. or below, a value obtained by dividing a toe radius ? of a toe part of welding by a sheet thickness t of a base metal (?/t) is 0.25 or above, an expression Ms(° C.)?375×[?/t]+320 is satisfied, and a crack defect does not exist in the fillet weld joint.Type: GrantFiled: June 23, 2011Date of Patent: October 4, 2016Assignee: Kobe Steel, Ltd.Inventors: Reiichi Suzuki, Masao Kinefuchi, Ryu Kasai
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Patent number: 9339887Abstract: In the bonding of an aluminum alloy material (11) to a steel material (12) by TIG welding, a tungsten electrode (1) which has a tip having a diagonally cut tip face (2) and asymmetrical to the electrode center axis (6) is used. The tungsten electrode (1) is oriented toward the welding line from the upper side of the aluminum alloy material (11) in such a manner that the tip face side of the tungsten electrode (1) faces the aluminum alloy material (11) side and the tip (2a) of the tip face (2) faces the steel material (12) side. In this manner, an arc (3) from the tip (2a) is directed to the steel material (12) side.Type: GrantFiled: February 29, 2012Date of Patent: May 17, 2016Assignee: Kobe Steel, Ltd.Inventors: Masao Kinefuchi, Yasuo Murai, Noritaka Eguchi
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Patent number: 8932728Abstract: There are provided an aluminum-alloy clad sheet and a clad sheet subjected to heating equivalent to brazing, which each have a high strength and an excellent erosion resistance and thus allow a reduction in thickness of a clad sheet subjected to heating equivalent to brazing such as an aluminum alloy radiator tube, and/or of a clad sheet such as an aluminum-alloy brazing sheet. An aluminum-alloy clad sheet or a clad sheet subjected to heating equivalent to brazing includes at least a core aluminum alloy sheet and an aluminum-alloy sacrificial anti-corrosive material cladded with each other, and is to be formed into a heat exchanger by brazing. The core aluminum alloy sheet includes a specified 3000 series composition.Type: GrantFiled: February 21, 2013Date of Patent: January 13, 2015Assignee: Kobe Steel, Ltd.Inventors: Katsushi Matsumoto, Masao Kinefuchi, Takahiro Izumi
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Publication number: 20140161659Abstract: This high-strength hot-rolled steel plate contains specific amounts of C, Si, Mn, Al, V and also Ti and/or Nb so as to fulfill C?12(V/51+Ti/48+Nb/93)>0.03, and the rest consists of iron and unavoidable impurities. Ferrite is the main microstructure, the remaining microstructure is one or more selected from the group consisting of bainite, martensite and retained austenite, wherein the average particle diameter of precipitated carbides (the total content of V, Ti and Nb is 0.02% or greater) in the ferrite is less than 6 nm.Type: ApplicationFiled: August 15, 2012Publication date: June 12, 2014Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Toshio Murakami, Masao Kinefuchi, Hideo Hata
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Patent number: 8668234Abstract: A bumper beam having increased bending strength achieved with a minimum increase in the weight of the bumper beam. The bumper beam (1) is mounted to the front of a vehicle, extends along a reference line (W), and is provided with a beam body (2) and a reinforcing plate (3). In at least one cross section perpendicular to the reference line (W), the reinforcing plate (3) extends linearly and the beam body (2) includes a pair of protrusions (2t, 2s) protruding, while surrounding an inner space, from the reinforcing plate (3) in a direction intersecting the reinforcing plate (3). If the Young's modulus and the density of the beam body (2) are Est and ?st, respectively, and the Young's modulus and the density of the reinforcing plate (3) are E2 and ?2, respectively, the expression (Est/?st3)<(E2/?23) is satisfied.Type: GrantFiled: February 25, 2009Date of Patent: March 11, 2014Assignee: Kobe Steel, Ltd.Inventors: Takunori Yamaguchi, Masao Kinefuchi, Tomokazu Nakagawa, Mie Tachibana, Kenichi Watanabe
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Publication number: 20130341306Abstract: In the bonding of an aluminum alloy material (11) to a steel material (12) by TIG welding, a tungsten electrode (1) which has a tip having a diagonally cut tip face (2) and asymmetrical to the electrode center axis (6) is used. The tungsten electrode (1) is oriented toward the welding line from the upper side of the aluminum alloy material (11) in such a manner that the tip face side of the tungsten electrode (1) faces the aluminum alloy material (11) side and the tip (2a) of the tip face (2) faces the steel material (12) side. In this manner, an arc (3) from the tip (2a) is directed to the steel material (12) side.Type: ApplicationFiled: February 29, 2012Publication date: December 26, 2013Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masao Kinefuchi, Yasuo Murai, Noritaka Eguchi
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Patent number: 8562041Abstract: A bumper structure which as a whole has a reduced weight and which has sufficient buckling strength. A bumper structure has a box-like outer shape constituted of a front flange (2), a rear flange (3), an upper web (4), and a lower web (5) which consist of a steel material. An intermediate web (6) consisting of a material other than the steel material is disposed between the upper web (4) and the lower web (5). If the Young's modulus of the steel material is E1, the density of the steel material is ?1, the Young's modulus of the material which forms the intermediate web (6) is E2, and the density of the material which forms the intermediate web (6) is ?2, the bumper structure satisfies E1/?13<E2/?23.Type: GrantFiled: May 13, 2010Date of Patent: October 22, 2013Assignee: Kobe Steel, Ltd.Inventors: Masao Kinefuchi, Tomokazu Nakagawa, Takunori Yamaguchi, Mie Tachibana, Kenichi Watanabe
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Publication number: 20130181463Abstract: A bumper beam having increased bending strength achieved with a minimum increase in the weight of the bumper beam. The bumper beam (1) is mounted to the front of a vehicle, extends along a reference line (W), and is provided with a beam body (2) and a reinforcing plate (3). In at least one cross section perpendicular to the reference line (W), the reinforcing plate (3) extends linearly and the beam body (2) includes a pair of protrusions (2t, 2s) protruding, while surrounding an inner space, from the reinforcing plate (3) in a direction intersecting the reinforcing plate (3). If the Young's modulus and the density of the beam body (2) are Est and ?st, respectively, and the Young's modulus and the density of the reinforcing plate (3) are E2 and ?2, respectively, the expression (Est/?st3) <(E2/?23) is satisfied.Type: ApplicationFiled: February 25, 2009Publication date: July 18, 2013Inventors: Takunori Yamaguchi, Masao Kinefuchi, Tomokazu Nakagawa, Mie Tachibana, Kenichi Watanabe
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Publication number: 20130168366Abstract: In the present invention, when spot welding a cold rolled steel sheet and an aluminum alloy sheet, pre-electrification is performed ahead of time in conditions wherein the sheet thickness (ta) of the aluminum alloy sheet and the sheet thickness (ts) of the cold rolled steel sheet that are to be joined are in specific ranges, dust is not generated between the steel sheet and an electrode, and the aluminum alloy sheet side is not caused to melt, and afterwards, main spot welding is performed. The welding conditions of the main spot welding and the pre-electrification further satisfy a relational expression that is determined by each electrification condition and each sheet thickness.Type: ApplicationFiled: September 8, 2011Publication date: July 4, 2013Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masao Kinefuchi, Hideo Hata
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Publication number: 20130017406Abstract: An automobile component to which an eccentric compressive load is applied becomes lighter without deteriorating performance. Density ?, sheet thickness t, Young's modulus E, and yield stress ?y of a material composing an inner panel 3, and a width B of a flange 3a in the automobile component 1 equipped with an outer panel 2 and the inner panel 3 including the flange 3a projecting to an outer side in the center, satisfy the following formulae (1), (2) and (3). ?×t?15.0(kg/m2)??(1) (B/t)?{square root over (?y/E)}?1.Type: ApplicationFiled: March 25, 2011Publication date: January 17, 2013Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masao Kinefuchi, Tomokazu Nakagawa, Mie Tachibana
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Patent number: 8343635Abstract: Provided is a multi-layered sheet which has undergone heating corresponding to brazing, such as an aluminum-alloy radiator tube, or a multi-layered sheet such as an aluminum-alloy brazing sheet. The multi-layered sheet can have a reduced thickness and has excellent fatigue properties. The multi-layered sheet of aluminum alloys comprises a core layer (2) which has been clad at least with a sacrificial layer (3). This multi-layered sheet is a multi-layered sheet to be subjected to brazing or welding to produce a heat exchanger or is a multi-layered sheet which has undergone heating corresponding to brazing. The core layer (2) comprises a specific 3000-series composition. In this core layer (2), the average density in number of dispersed particles having a specific size has been regulated. As a result, fatigue properties, which govern cracking, can be highly improved.Type: GrantFiled: February 5, 2009Date of Patent: January 1, 2013Assignee: Kobe Steel, Ltd.Inventors: Katsushi Matsumoto, Eiichi Tamura, Masao Kinefuchi, Toshiki Ueda, Fumihiro Koshigoe, Shimpei Kimura
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Patent number: 8337998Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg-base or Al—Zn—Mg-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: GrantFiled: January 26, 2012Date of Patent: December 25, 2012Assignee: Kobe Steel, Ltd.Inventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi
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Patent number: 8221899Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg—Si-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: GrantFiled: April 24, 2009Date of Patent: July 17, 2012Assignee: Kobe Steel, Ltd.Inventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi
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Publication number: 20120121931Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg-base or Al—Zn—Mg-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: ApplicationFiled: January 26, 2012Publication date: May 17, 2012Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Mikako TAKEDA, Mamoru Nagao, Masao Kinefuchi
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Publication number: 20120043772Abstract: A bumper structure which as a whole has a reduced weight and which has sufficient buckling strength. A bumper structure has a box-like outer shape constituted of a front flange (2), a rear flange (3), an upper web (4), and a lower web (5) which consist of a steel material. An intermediate web (6) consisting of a material other than the steel material is disposed between the upper web (4) and the lower web (5). If the Young's modulus of the steel material is E1, the density of the steel material is ?1, the Young's modulus of the material which forms the intermediate web (6) is E2, and the density of the material which forms the intermediate web (6) is ?2, the bumper structure satisfies E1/?13<E2/?23.Type: ApplicationFiled: May 13, 2010Publication date: February 23, 2012Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD)Inventors: Masao Kinefuchi, Tomokazu Nakagawa, Takunori Yamaguchi, Mie Tachibana, Kenichi Watanabe
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Publication number: 20120003035Abstract: A fillet weld joint of steel having high fatigue strength by improving stress concentration without excessively relying on imparting a compressive residual stress to a toe part by welding materials, free of cracking, and excellent in the toughness, and a method for gas shielded arc welding for obtaining the fillet weld joint are provided. In the fillet weld joint, a martensitic transformation starting temperature (Ms point) of a weld metal is 400° C. or above and 550° C. or below, a value obtained by dividing a toe radius ? of a toe part of welding by a sheet thickness t of a base metal (?/t) is 0.25 or above, an expression below Ms(° C.)?375×[?/t]+320??(1) is satisfied, and a crack defect does not exist.Type: ApplicationFiled: June 23, 2011Publication date: January 5, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: REIICHI SUZUKI, MASAO KINEFUCHI, RYU KASAI
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Patent number: 8043711Abstract: Disclosed herein is an aluminum alloy clad sheet for a heat exchanger including a core layer, a sacrificial layer formed on one surface of the core layer, and a filler layer including an Al—Si based alloy formed on the other surface of the core layer. The core layer includes a predetermined amount of Si, Cu, Mn, Ti, and Mg, the remainder including Al and inevitable impurities, and the sacrificial layer includes a predetermined amount of Si, Mn, and Zn, the remainder including Al and inevitable impurities. The core layer has a crystal grain size after the brazing heat treatment at 595° C. for 3 minutes of at least 50 ?m and less than 300 ?m. The filler layer and the sacrificial layer are defined for their thickness, and the number of intermetallic compounds in the core layer is also defined to a predetermined range. By such constitution, the aluminum alloy clad sheet has improved fatigue life and post-braze strength, high corrosion resistance, and excellent erosion resistance and brazeability.Type: GrantFiled: December 16, 2008Date of Patent: October 25, 2011Assignee: Kobe Steel, Ltd.Inventors: Fumihiro Koshigoe, Toshiki Ueda, Shimpei Kimura, Masao Kinefuchi, Katsushi Matsumoto, Eiichi Tamura
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Publication number: 20110097595Abstract: A joined body of dissimilar metals which is produced by joining a steel material and an aluminum alloy material, wherein the steel material to be joined has a specific composition and is specified in the compositions of outer surface oxide layer and inner oxide layer and the aluminum alloy material to be joined is an Al—Mg—Si-base aluminum alloy having a specific composition. In the joined body of dissimilar metals, a content of Fe at a joint interface on the aluminum alloy material side is regulated, and a reaction layer of Fe and Al is formed at the joint interface of the joined body of dissimilar metals. The joined body of dissimilar metals exhibits high joint strength.Type: ApplicationFiled: April 24, 2009Publication date: April 28, 2011Applicant: Kabushiki Kaisha Kobe Seiko ShoInventors: Mikako Takeda, Mamoru Nagao, Masao Kinefuchi