公开(公告)号：US09997786B2

公开(公告)日：2018-06-12

申请号：US14343466

申请日：2013-04-18

申请人： Nippon Steel & Sumitomo Metal Corporation ,  Nippon Steel & Sumikin Materials Co., Ltd.

发明人： Kiyokazu Ishizuka ,  Yuji Kubo ,  Jun Nakatsuka ,  Shuji Nagasaki

IPC分类号： H01M4/66 ,  B21B1/40 ,  C25D5/34 ,  C22C38/00 ,  C22C38/06 ,  C22C38/14 ,  C25D5/36 ,  B32B15/01 ,  C22C19/03 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C25D7/06 ,  H01M4/82 ,  C21D8/04 ,  C21D9/46 ,  H01M10/0525

CPC分类号： H01M4/662 ,  B21B1/40 ,  B32B15/013 ,  B32B15/015 ,  C21D8/0436 ,  C21D8/0478 ,  C21D9/46 ,  C21D2211/004 ,  C21D2251/02 ,  C22C19/03 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C25D5/34 ,  C25D5/36 ,  C25D7/0614 ,  H01M4/82 ,  H01M10/0525

摘要： A steel foil according to an aspect of the present invention includes, by mass %, C: 0.0001 to 0.02%; Si: 0.001 to 0.01%; Mn: 0.01 to 0.3%; P: 0.001 to 0.02%; S: 0.0001 to 0.01%; Al: 0.0005 to 0.1%; N: 0.0001 to 0.004%; and a balance consisting of Fe and impurities, wherein a thickness is 5 to 15 μm, and a tensile strength is more than 900 MPa and 1.200 MPa or less.

公开(公告)号：US09988697B2

公开(公告)日：2018-06-05

申请号：US14110896

申请日：2012-04-12

申请人： Yoshihiro Suwa ,  Kazuaki Nakano ,  Kunio Hayashi ,  Riki Okamoto ,  Nobuhiro Fujita ,  Kohichi Sano

发明人： Yoshihiro Suwa ,  Kazuaki Nakano ,  Kunio Hayashi ,  Riki Okamoto ,  Nobuhiro Fujita ,  Kohichi Sano

IPC分类号： C21D8/02 ,  C22C38/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/04 ,  B32B15/01 ,  C22C38/08 ,  C22C38/10 ,  C22C38/16 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/22 ,  C23C2/06 ,  C23C2/28 ,  C23C2/36

CPC分类号： C21D9/46 ,  B32B15/013 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D2201/05 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C23C2/06 ,  C23C2/285 ,  C23C2/36 ,  Y10T428/12799

摘要： This high-strength hot-rolled steel sheet having excellent local deformability contains, in mass %, C: 0.07% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001% to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of ⅝ to ⅜ in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100} to {223} orientation group is 4.0 or less, and a pole density of the {332} crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 10 μm or less.

公开(公告)号：US09938599B2

公开(公告)日：2018-04-10

申请号：US14008169

申请日：2012-03-28

申请人： Keiji Ueda ,  Nobuyuki Ishikawa

发明人： Keiji Ueda ,  Nobuyuki Ishikawa

IPC分类号： C21D8/02 ,  C22C38/02 ,  C22C38/50 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C21D8/04 ,  C21D1/25

CPC分类号： C21D8/0263 ,  C21D1/25 ,  C21D8/0426 ,  C21D8/0463 ,  C21D8/0473 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/50

摘要： An abrasion resistant steel plate or steel sheet suitable for use in construction machines, industrial machines, and the like and a method for manufacturing the same. In particular, a steel plate or steel sheet has a composition containing 0.20% to 0.30% C, 0.05% to 1.0% Si, 0.40% to 1.20% Mn, P, S, 0.1% or less Al, 0.01% or less N, and 0.0003% to 0.0030% B on a mass basis, the composition further containing one or more of Cr, Mo, and W, the composition further containing one or more of Nb, Ti, Cu, Ni, V, an REM, Ca, and Mg as required, the remainder being Fe and inevitable impurities. A semi-finished product having the above steel composition is heated, hot rolling is performed, air cooling is performed, reheating is performed, and accelerated cooling is then performed or accelerated cooling is performed immediately after hot rolling.

公开(公告)号：US09920391B2

公开(公告)日：2018-03-20

申请号：US14758455

申请日：2014-02-06

申请人： TATA STEEL IJMUIDEN B.V.

发明人： Rolf Arjan Rijkenberg

IPC分类号： C22C38/04 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C23C2/06 ,  C23C2/12 ,  C21D9/52 ,  C23C2/02 ,  B32B15/01 ,  C22C38/00 ,  C22C38/14 ,  C21D6/00 ,  C21D6/02

CPC分类号： C21D8/0263 ,  B32B15/012 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D6/02 ,  C21D8/0226 ,  C21D9/46 ,  C21D9/52 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

摘要： A high-strength hot-rolled steel strip or sheet with tensile strength of 570 to 870 MPa and an excellent combination of total elongation, stretch-flange formability, as well as fatigue resistance and to a method of manufacturing the steel strip or sheet and a chassis part made thereof.

公开(公告)号：US09903023B2

公开(公告)日：2018-02-27

申请号：US14430410

申请日：2013-09-26

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Naoki Maruyama ,  Tatsuo Yokoi ,  Hiroyuki Tanahashi ,  Atsushi Seto ,  Atsushi Itami

IPC分类号： C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D9/46 ,  C21D8/02 ,  C23C30/00 ,  C22C38/00 ,  C22C38/04 ,  B32B15/01 ,  C21D6/00 ,  C22C38/08 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C21D8/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

CPC分类号： C23C30/005 ,  B32B15/01 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0221 ,  C21D8/0263 ,  C21D8/0278 ,  C21D8/0426 ,  C21D8/0463 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12972

摘要： A hot rolled steel sheet consisting of, in mass %, C: 0.05% to 0.15%, Si: 0% to 0.2%, Al: 0.5% to 3.0%, Mn: 1.2% to 2.5%, P: 0.1% or less, S: 0.01% or less, N: 0.007% or less, Ti: 0.03% to 0.10%, Nb: 0.008% to 0.06%, V: 0% to 0.12%, one or more of Cr, Cu, Ni, and Mo: 0% to 2.0% in total, B: 0% to 0.005%, one or more of Ca, Mg, La, and Ce: 0% to 0.01% in total, total amount of Si and Al: 0.8×(Mn−1)% or more, total amount of Ti and Nb: 0.04% to 0.14%, and the balance: Fe and impurities. In a structure of steel, a total area ratio of martensite and retained austenite is 3% to 20%, an area ratio of ferrite is 50% to 96%, and an area ratio of pearlite is 3% or less. In a superficial layer part, the thickness in a sheet thickness direction of a region in which a network-like oxide is present is less than 0.5 μm, and a maximum tensile strength is 720 MPa or more.

公开(公告)号：US20180030567A1

公开(公告)日：2018-02-01

申请号：US15551325

申请日：2015-05-26

申请人： EASYFORMING STEEL TECHNOLOGY CO., LTD.

发明人： Hongliang YI ,  Pengju DU

IPC分类号： C21D9/48 ,  B21D37/16 ,  C21D8/04 ,  C21D6/00 ,  C22C38/38 ,  C22C38/22 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/20 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C22C38/42 ,  B21D22/02

CPC分类号： C21D9/48 ,  B21D22/022 ,  B21D37/16 ,  C21D1/18 ,  C21D1/673 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/04 ,  C21D8/0405 ,  C21D9/0068 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/58

摘要： A steel sheet used for hot stamping includes, by weight percent, 0.18˜0.42% of C, 4˜8.5% of Mn and 0.8˜3.0% of Si+Al with the balance being Fe and unavoidable impurities. The alloy elements of the steel sheet enable the actual measured value of the martensitic transformation start temperature after hot stamping to be ≦280° C. The method for manufacturing the component includes: heating the material to 700˜850° C. and then stamping; cooling it to the temperature that is 150˜260° C. below the martensitic transformation start temperature by cooling in a die, cooling by air, water, or other methods; heating the component to a temperature ranging from 160 to 450° C. and maintaining the temperature for 1 to 100000 seconds for heat treatment, and then cooling the component to room temperature. The formed component has a yield strength of ≧1200 MPa, a tensile strength of ≧1600 MPa and a total elongation of ≧10%.

公开(公告)号：US09879336B2

公开(公告)日：2018-01-30

申请号：US14417761

申请日：2013-07-31

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Natsuko Sugiura ,  Shigeru Yonemura ,  Naoki Maruyama

IPC分类号： C22C38/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D9/48 ,  C22C38/14 ,  B32B15/01 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C25D5/36 ,  C25D7/06 ,  C21D8/04 ,  C21D8/02 ,  C21D9/46 ,  C22C38/08 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0405 ,  C21D8/0436 ,  C21D8/0447 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/46 ,  C21D9/48 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36 ,  C25D7/0614 ,  Y10T428/12799

摘要： A cold-rolled steel sheet containing: in mass %, C: 0.0005 to 0.0045%; Mn: 0.80 to 2.50%; Ti: 0.002 to 0.150%; B: 0.0005 to 0.01%, in which (1) Expression is satisfied, and a balance being composed of iron and impurities, in which at the position of ¼ thickness of a sheet thickness, a random intensity ratio (A) of the {332} orientation is 3 or less, a random intensity ratio (B) of the {557} orientation and a random intensity ratio (C) of the {111} orientation are both 7 or more, and {(B)/(A)≧5} and {(B)>(C)} are satisfied.

公开(公告)号：US20180023171A1

公开(公告)日：2018-01-25

申请号：US15720168

申请日：2017-09-29

申请人： POSCO

发明人： Jin-Keun OH ,  Kyoo-Young LEE ,  Yeol-Rae CHO ,  Eul-Yong CHOI ,  Ki-Soo KIM

IPC分类号： C22C38/38 ,  B21B1/04 ,  C23C2/02 ,  C22C38/60 ,  C22C38/58 ,  C22C38/18 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  B21B15/00 ,  C21D6/00 ,  C21D8/02 ,  C21D8/04 ,  C21D9/46 ,  C23C2/12 ,  C21D7/13

CPC分类号： C22C38/38 ,  B21B1/04 ,  B21B15/00 ,  B21B2015/0057 ,  C21D6/005 ,  C21D7/13 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0463 ,  C21D8/0473 ,  C21D8/0478 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/58 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12

摘要： Provided is a warm-pressed member comprising, by weight %, C: 0.01% to 0.5%, Si: 3.0% or less (excluding 0%), Mn: 3% to 15%, P: 0.0001% to 0.1%, S: 0.0001% to 0.03%, Al: 3.0% or less (excluding 0%), N: 0.03% or less (excluding 0%), and the balance of Fe and inevitable impurities. After a warm press forming process and a cooling process, the warm-pressed member has a microstructure comprising: 5 volume % to 50 volume % of retained austenite; and at least one of ferrite, martensite, tempered martensite, and bainite as a remainder.

公开(公告)号：US20170335481A1

公开(公告)日：2017-11-23

申请号：US15670041

申请日：2017-08-07

申请人： Muhr und Bender KG

发明人： Wolfgang Eberlein ,  Jörg Dieter Brecht

IPC分类号： C25D5/36 ,  C25D5/50 ,  C21D8/02 ,  C21D8/04 ,  B21B37/26 ,  C25D7/06 ,  C21D9/48

CPC分类号： C25D5/36 ,  B21B37/26 ,  B21B2205/02 ,  B21B2261/05 ,  B21D39/02 ,  C21D1/673 ,  C21D8/0205 ,  C21D8/0405 ,  C21D8/0442 ,  C21D9/48 ,  C21D2221/00 ,  C25D5/48 ,  C25D5/50 ,  C25D7/0614 ,  Y10T29/49986 ,  Y10T428/12389

摘要： A method for manufacturing a product from a flexibly rolled strip material includes the steps of: providing a strip material made from sheet steel; flexibly rolling the strip material such that a variable thickness is produced along the length of the strip material; electrolytically coating the strip material with a metallic coating material containing at least 93% of zinc by mass after the flexible rolling; heat treating at temperatures above 350° C. and below a solidus line of the coating material after the electrolytic coating; working a blank from the flexibly rolled strip material; and hot forming the blank.

公开(公告)号：US09803266B2

公开(公告)日：2017-10-31

申请号：US14405227

申请日：2013-06-24

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Yukiko Kobayashi ,  Eisaku Sakurada ,  Kunio Hayashi

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C21D8/02 ,  C21D9/46 ,  C22C38/14 ,  C22C38/00 ,  C22C38/12 ,  C21D8/04 ,  C21D9/48

CPC分类号： C22C38/14 ,  C21D8/0263 ,  C21D8/0463 ,  C21D9/46 ,  C21D9/48 ,  C21D2201/05 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： Provided is a high-strength hot-rolled steel sheet containing, by mass %, C: 0.050 to 0.200%, Si: 0.01 to 1.5%, Mn: 1.0 to 3.0%, B: 0.0002 to 0.0030%, Ti: 0.03 to 0.20%, P: limited to 0.05% or less, S: limited to 0.005% or less, Al: limited to 0.5% or less, N: limited to 0.009% or less, and one or more of Nb: 0.01 to 0.20%, V: 0.01 to 0.20%, and Mo: 0.01 to 0.20%, with the balance being composed of Fe and inevitable impurities. In the high-strength hot-rolled steel sheet, a ratio of a length of small-angle crystal grain boundaries that are boundaries having a crystal orientation angle of 5° or more but less than 15° to a length of large-angle crystal grain boundaries that are boundaries having a crystal orientation angle of 15° or more is 1:1 to 1:4, an total segregation amount of C and B in the large-angle grain boundaries is 4 to 20 atoms/nm2, tensile strength is 850 MPa or higher, and a hole expansion ratio is 25% or more.