公开(公告)号：EP2392682A4

公开(公告)日：2015-02-25

申请号：EP10735966

申请日：2010-01-29

申请人： JFE STEEL CORP

发明人： KAMI CHIKARA ,  NAKATA HIROSHI ,  NAKAGAWA KINYA

IPC分类号： C22C38/00 ,  B21B1/26 ,  B21B3/00 ,  C21D8/02 ,  C22C38/14 ,  C22C38/58

CPC分类号： C22C38/58 ,  B21B3/00 ,  C21D8/0205 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： A method of manufacturing a thick high-tensile-strength hot-rolled steel sheet which possesses both of high strength with TS of 510MPa or more and excellent ductility thus exhibiting the excellent strength-ductility balance, and further possesses excellent low temperature toughness is provided. To be more specific, a high-tensile-strength hot-rolled steel sheet has a composition which contains 0.02 to 0.08% C, 0.01 to 0.10% Nb, 0.001 to 0.05% Ti and Fe and unavoidable impurities as a balance, wherein the steel sheet contains C, Ti and Nb in such a manner that (Ti+(Nb/2))/C

公开(公告)号：EP2415539A4

公开(公告)日：2012-08-22

申请号：EP10758933

申请日：2010-03-31

申请人： JFE STEEL CORP

发明人： HASHIMOTO YUJI ,  TOYODA SHUNSUKE ,  NAKAGAWA KINYA ,  SUZUKI KOJI ,  KAWABATA YOSHIKAZU ,  SONOBE OSAMU ,  SATO AKIO

IPC分类号： B21D53/88 ,  B21D11/02 ,  B21D17/02 ,  B60G9/04

CPC分类号： B21D53/88 ,  B21D9/15 ,  B21D11/02 ,  B21D17/02 ,  B21D22/025 ,  B60G21/051 ,  B60G2206/30 ,  B60G2206/80 ,  Y10T29/49622

公开(公告)号：EP2946849A4

公开(公告)日：2015-12-30

申请号：EP14740576

申请日：2014-01-20

申请人： JFE STEEL CORP

发明人： FUJII YUSUKE ,  SHINMIYA TOYOHISA ,  NAKAGAWA KINYA ,  YAMASAKI YUJI ,  OCHI KATSUHIRO

IPC分类号： B21D22/26 ,  B21D5/01

CPC分类号： B21D22/02 ,  B21D5/01 ,  B21D22/26

摘要： Using a related-art die set for press forming to manufacture a metal component with a three-dimensional edge in a simple process causes cracking and wrinkling to occur. Consequently, a target shape of the metal component with a three-dimensional edge cannot be obtained. Thus, simplifying the manufacturing process and reducing the weight of products are very difficult to achieve at the same time. A method for manufacturing a metal component with a three-dimensional edge manufactures the metal component with a three-dimensional edge from a blank 10 as a raw material. The blank 10 is cut from a metal sheet and has a curve-shaped curved edge portion 15 having both ends. The curved edge portion, or further, the curved edge portion and part of the blank adjacent to the curved edge portion are processed into a three-dimensional shape by forming. The method includes a step of providing a bend formation line and a step of forming the three-dimensional shape. The step of providing the bend formation line serves as a first step and provides the bend formation line in the curved edge portion so that a bend radius of a section of a bent portion downwardly or upwardly bent along a curve of the curved edge portion is from 0.5 to 30 mm. The step of forming the three-dimensional shape serves as a second step following the first step, and processes the curved edge portion, or further, the curved edge portion and the part of the blank adjacent to the curved edge portion into the three-dimensional shape from the bend formation line as a start point by moving both end portions of the curved edge portion so as to reduce or increase a distance between both the ends.

公开(公告)号：EP2392681A4

公开(公告)日：2014-04-02

申请号：EP10735967

申请日：2010-01-29

申请人： JFE STEEL CORP

发明人： NAKAGAWA KINYA ,  KAMI CHIKARA

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/14 ,  C22C38/58

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D2211/002 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A thick-walled high-strength hot rolled steel sheet having excellent hydrogen induced cracking resistance which is preferably used as a raw material for a high-strength welded steel pipe of X65 grade or more and a method of manufacturing the thick-walled high-strength hot rolled steel sheet are provided. To be more specific, the composition of the thick-walled high-strength hot rolled steel sheet contains by mass% 0. 02 to 0.08% C, 0. 50 to 1.85% Mn, 0. 03 to 0.10% Nb, 0.001 to 0.05% Ti, 0.0005% or less B in such a manner that (Ti+Nb/2)/C

公开(公告)号：EP3020492A4

公开(公告)日：2016-07-06

申请号：EP14823787

申请日：2014-07-08

申请人： JFE STEEL CORP

发明人： NAKAGAWA KINYA ,  KISHIGAMI YASUHIRO ,  YAMASAKI YUJI

IPC分类号： B21D22/26

CPC分类号： C21D9/50 ,  B21B15/00 ,  B21B2015/0092 ,  B21D22/20 ,  B21D22/26 ,  B23K11/0873 ,  C21D6/004 ,  C21D7/13 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  F16L9/02

摘要： Provided is a method for forming a blank, the method being capable of improving both yields and formability. The method for forming a blank 1 includes forming the blank 1 into a preforming shape by plastic deformation and then plastically deforming the blank 1 from the preforming shape into a final shape. The preforming shape is determined so that, in each of cross sections in the final shape, the ratio (L1/L0) of a cross-sectional line length L1 in the preforming shape to a cross-sectional line length L0 in the final shape in the same cross section position falls within a predetermined tolerance range.

公开(公告)号：EP2309014A4

公开(公告)日：2012-07-25

申请号：EP09803078

申请日：2009-07-31

申请人： JFE STEEL CORP

发明人： KAMI CHIKARA ,  NAKATA HIROSHI ,  NAKAGAWA KINYA

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/14 ,  C22C38/58

CPC分类号： C22C38/58 ,  C21D1/25 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/085 ,  C21D9/46 ,  C21D11/005 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50