Patents by Inventor Kouji Kasuya
Kouji Kasuya 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: 20200095651Abstract: A high-strength cold-rolled steel sheet has a specific chemical composition and has a steel microstructure meeting conditions: a total content of bainitic ferrite (BF) and tempered martensite (TM) is 65% (in area percent, hereinafter the same for steel microstructure) or more; a fresh martensite (M) content is 3% to 18%; a retained austenite content is 5% or more; and a polygonal ferrite (F) content is 5% or less. The steel sheet has a specific average KAM<1.00° of 0.50° or more and has a tensile strength of 980 MPa or more. The high-strength cold-rolled steel sheet excels in formability and shape fixability.Type: ApplicationFiled: November 29, 2019Publication date: March 26, 2020Applicant: Kabushiki Kaisha Kobe Seiko Sha (Kobe Steel, Ltd.)Inventors: Kouji KASUYA, Yuichi FUTAMURA, Yukihiro UTSUMI
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Patent number: 9464337Abstract: Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).Type: GrantFiled: May 28, 2010Date of Patent: October 11, 2016Assignees: KABUSHIKI KAISHA KOBE SEIKO SHO, VOESTALPINE STAHL GMBHInventors: Yoichi Mukai, Kouji Kasuya, Michiharu Nakaya, Michitaka Tsunezawa, Fumio Yuse, Junichiro Kinugasa, Sandra Traint, Andreas Pichler
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Publication number: 20150086808Abstract: A high-strength cold-rolled steel sheet has a specific chemical composition and has a steel microstructure meeting conditions: a total content of bainitic ferrite (BF) and tempered martensite (TM) is 65% (in area percent, hereinafter the same for steel microstructure) or more; a fresh martensite (M) content is 3% to 18%; a retained austenite content is 5% or more; and a polygonal ferrite (F) content is 5% or less. The steel sheet has a specific average KAM<1.00° of 0.50° or more and has a tensile strength of 980 MPa or more. The high-strength cold-rolled steel sheet excels in formability and shape fixability.Type: ApplicationFiled: March 6, 2013Publication date: March 26, 2015Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Kouji Kasuya, Yuichi Futamura, Yukihiro Utsumi
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Patent number: 8673093Abstract: The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above where Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001),and the thin steel sheet has 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties.Type: GrantFiled: December 10, 2007Date of Patent: March 18, 2014Assignee: Kobe Steel, Ltd.Inventors: Muneaki Ikeda, Kouji Kasuya, Yoichi Mukai, Fumio Yuse, Junichiro Kinugasa
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Publication number: 20120132327Abstract: Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).Type: ApplicationFiled: May 28, 2010Publication date: May 31, 2012Applicants: VOESTALPINE STAHL GMBH, Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoichi Mukai, Kouji Kasuya, Michiharu Nakaya, Michitaka Tsunezawa, Fumio Yuse, Junichiro Kinugasa, Sandra Traint, Andreas Pichler
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Patent number: 7887648Abstract: The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 ?m or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 ?m or less.Type: GrantFiled: December 28, 2006Date of Patent: February 15, 2011Assignee: Kobe Steel, Ltd.Inventors: Junichiro Kinugasa, Fumio Yuse, Yoichi Mukai, Shinji Kozuma, Hiroshi Akamizu, Kouji Kasuya, Muneaki Ikeda, Koichi Sugimoto
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Publication number: 20100080728Abstract: The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above. Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001)} Thus a high strength thin steel sheet with 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties can be provided. Also, in accordance with the present invention, the hot-rolled steel sheet for cold-rolling capable of manufacturing the high strength thin steel sheet with good productivity and having improved cold-rollability can be provided.Type: ApplicationFiled: December 10, 2007Publication date: April 1, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Muneaki Ikeda, Kouji Kasuya, Yoichi Mukai, Fumio Yuse, Junichiro Kinugasa
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Publication number: 20090238713Abstract: The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 ?m or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 ?m or less.Type: ApplicationFiled: December 28, 2006Publication date: September 24, 2009Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Shinshu TLO Co., Ltd.Inventors: Junichiro Kinugasa, Fumio Yuse, Yoichi Mukai, Shinji Kozuma, Hiroshi Akamizu, Kouji Kasuya, Muneaki Ikeda, Koichi Sugimoto
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Patent number: 6772650Abstract: An automatic sample analyzer includes: a pipette, a pipette driving device which moves the pipette to a sample vessel present in a predetermined position to cause the pipette to suck up a sample from the sample vessel, and then moves the pipette to an open vessel provided in another predetermined position to cause the pipette to discharge the sample into the open vessel, and an analyzing section for analyzing the discharged sample, the pipette driving device comprising a vertically movable main arm and an elongated guide arm cantilevered by the main arm and extending horizontally, the guide arm having a smaller flexural rigidity than the main arm, wherein the main arm vertically moves the pipette when the sample is to be sucked up from the sample vessel, and the guide arm guides the pipette to the open vessel and then vertically moves the pipette when the sample is to be discharged into the open vessel.Type: GrantFiled: September 6, 2002Date of Patent: August 10, 2004Assignee: Sysmex CorporationInventors: Yasuhiro Ohyama, Kazuyuki Sakurai, Yoichi Nakamura, Noriyoshi Yoshida, Kazutoshi Tokunaga, Kouji Kasuya, Eiji Tanoshima, Toshihiro Kubota, Takaaki Nagai, Shuhei Kaneko, Masaharu Shibata, Seido Biwa, Toshihiro Ootani
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Publication number: 20030070498Abstract: An automatic sample analyzer includes: a pipette, a pipette driving device which moves the pipette to a sample vessel present in a predetermined position to cause the pipette to suck up a sample from the sample vessel, and then moves the pipette to an open vessel provided in another predetermined position to cause the pipette to discharge the sample into the open vessel, and an analyzing section for analyzing the discharged sample, the pipette driving device comprising a vertically movable main arm and an elongated guide arm cantilevered by the main arm and extending horizontally, the guide arm having a smaller flexural rigidity than the main arm, wherein the main arm vertically moves the pipette when the sample is to be sucked up from the sample vessel, and the guide arm guides the pipette to the open vessel and then vertically moves the pipette when the sample is to be discharged into the open vessel.Type: ApplicationFiled: September 6, 2002Publication date: April 17, 2003Inventors: Yasuhiro Ohyama, Kazuyuki Sakurai, Yoichi Nakamura, Noriyoshi Yoshida, Kazutoshi Tokunaga, Kouji Kasuya, Eiji Tanoshima, Toshihiro Kubota, Takaaki Nagai, Shuhei Kaneko, Masaharu Shibata, Seido Biwa, Toshihiro Ootani
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Patent number: D482793Type: GrantFiled: March 4, 2002Date of Patent: November 25, 2003Assignee: Sysmex CorporationInventors: Yasuhiro Oyama, Kazuyuki Sakurai, Yoichi Nakamura, Noriyoshi Yoshida, Kazutoshi Tokunaga, Kouji Kasuya