公开(公告)号：US20180195158A1

公开(公告)日：2018-07-12

申请号：US15746384

申请日：2016-07-20

申请人： STAMICARBON B.V.

发明人： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander Aleida Antonius SCHEERDER ,  Kirk Anguah OFEI

IPC分类号： C22C38/58 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  F28F21/08

CPC分类号： C22C38/58 ,  B01D1/06 ,  B01D3/32 ,  B01J19/02 ,  B01J2219/0286 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D9/08 ,  C21D2211/001 ,  C21D2211/005 ,  C22C1/02 ,  C22C33/04 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  F28F21/083 ,  Y02P10/122

摘要： The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea; and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure also relates to a method for the production of urea and to a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and to a method of modifying an existing plant for the production of urea.

公开(公告)号：US10000832B2

公开(公告)日：2018-06-19

申请号：US14342039

申请日：2012-08-28

申请人： Hideki Takabe ,  Hisashi Amaya ,  Kazuhiro Ogawa

发明人： Hideki Takabe ,  Hisashi Amaya ,  Kazuhiro Ogawa

IPC分类号： C22C38/58 ,  C21D9/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/54 ,  C21D6/00 ,  C21D9/50

CPC分类号： C22C38/58 ,  C21D6/004 ,  C21D6/005 ,  C21D9/08 ,  C21D9/50 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/54

摘要： Provided is duplex stainless steel having high strength, SCC resistance and SSC resistance excellent in a high-temperature chloride environment, and capable of suppressing precipitation of a σ phase. The duplex stainless steel of the present embodiment includes, in mass %, of: C: at most 0.03%; Si: 0.2 to 1%; Mn: more than 5.0% to at most 10%; P: at most 0.040%; S: at most 0.010%; Ni: 4.5 to 8%; sol. Al: at most 0.040%; N: more than 0.2% to at most 0.4%; Cr: 24 to 29%; Mo: 0.5 to less than 1.5%; Cu: 1.5 to 3.5%; W: 0.05 to 0.2%; the balance being Fe and impurities, wherein the duplex stainless steel satisfies Formula (1): Cr+8Ni+Cu+Mo+W/2≥65 . . . (1), where a symbol of each element in Formula (1) represents a content of the element (in mass %).

公开(公告)号：US09988700B2

公开(公告)日：2018-06-05

申请号：US14234938

申请日：2012-07-27

申请人： Akinobu Minami ,  Hiroyuki Kawata ,  Akinobu Murasato ,  Yuji Yamaguchi ,  Natsuko Sugiura ,  Takuya Kuwayama ,  Naoki Maruyama ,  Takamasa Suzuki

发明人： Akinobu Minami ,  Hiroyuki Kawata ,  Akinobu Murasato ,  Yuji Yamaguchi ,  Natsuko Sugiura ,  Takuya Kuwayama ,  Naoki Maruyama ,  Takamasa Suzuki

IPC分类号： C23C2/02 ,  C22C38/38 ,  C22C38/34 ,  C22C38/26 ,  C22C38/16 ,  C22C38/00 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/14 ,  C21D8/02 ,  C23C2/06 ,  C23C2/28 ,  C21D9/46 ,  C21D1/19 ,  C25D5/36 ,  C25D7/06 ,  C25D3/22

CPC分类号： C23C2/02 ,  C21D1/19 ,  C21D8/0205 ,  C21D8/0247 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/26 ,  C22C38/34 ,  C22C38/38 ,  C23C2/06 ,  C23C2/28 ,  C25D3/22 ,  C25D5/36 ,  C25D7/0614 ,  Y10T428/12799

摘要： The present invention provides a high-strength steel sheet excellent in shape fixability. The high-strength steel sheet contains C, Si, Mn, P, S, Al, N, and O with predetermined contents, in which a retained austenite phase of 5 to 20% in volume fraction is contained, an amount of solid-solution C contained in the retained austenite phase is 0.80 to 1.00% in mass %, WSiγ is 1.10 times or more WSi*, WMnγ is 1.10 times or more WMn*, and when a frequency distribution is measured with respect to a sum of a ratio between WSi and WSi* and a ratio between WAl and WAl*, a mode value of the frequency distribution is 1.95 to 2.05, and a kurtosis is 2.00 or more.

公开(公告)号：US09970074B2

公开(公告)日：2018-05-15

申请号：US14891889

申请日：2014-07-01

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Kaoru Kawasaki ,  Masaharu Kameda ,  Kohichi Sano ,  Riki Okamoto

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C21D8/04 ,  C21D9/46 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C22C38/54 ,  C22C38/12 ,  C21D8/02 ,  B32B15/01 ,  C21D6/00 ,  C22C38/00 ,  C22C38/08 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44

CPC分类号： C21D9/46 ,  B32B15/013 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0447 ,  C21D8/0473 ,  C21D2201/05 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A cold-rolled steel sheet includes a predetermined chemical composition, and includes a structure expressed by: an area fraction of ferrite: 95% or more; an area fraction of retained austenite and an area fraction of martensite: 1% to 3% in total; a product of the area fraction of retained austenite and a carbon concentration in retained austenite: 1 or more; a value of I(111)/{I(100)+I(110)} at a region where a depth from a surface is ¼ of a thickness of the cold-rolled steel sheet when intensity of a (hkl) plane is expressed by I(hkl): 2 or less.

公开(公告)号：US20180105908A1

公开(公告)日：2018-04-19

申请号：US15567418

申请日：2016-04-22

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Koutarou HAYASHI ,  Akihiro UENISHI ,  Masaharu KAMEDA ,  Jun HAGA ,  Kunio HAYASHI ,  Kohichi SANO ,  Hiroyuki KAWATA

IPC分类号： C22C38/58 ,  C21D9/46 ,  C21D8/02 ,  C23C2/40 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/00

CPC分类号： C22C38/58 ,  C21D8/0257 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A base material (13) included in a plated steel sheet (1) includes a structure, at a ¼ sheet thickness position, represented by, in volume fraction: tempered martensite: 3.0% or more; ferrite: 4.0% or more; and retained austenite: 5.0% or more. An average hardness of the tempered martensite in the base material (13) is 5 GPa to 10 GPa, and a part or all of the tempered martensite and the retained austenite in the base material form an M-A. A volume fraction of ferrite in a decarburized ferrite layer (12) included in the plated steel sheet (1) is 120% or more of the volume fraction of the ferrite in the base material (13) at the ¼ sheet thickness position, an average grain diameter of the ferrite in the decarburized ferrite layer (12) is 20 μm or less, a thickness of the decarburized ferrite layer (12) is 5 μm to 200 μm, a volume fraction of tempered martensite in the decarburized ferrite layer (12) is 1.0 volume % or more, a number density of the tempered martensite in the decarburized ferrite layer (12) is 0.01/μm2 or more, and an average hardness of the tempered martensite in the decarburized ferrite layer (12) is 8 GPa or less.

公开(公告)号：US20180073116A1

公开(公告)日：2018-03-15

申请号：US15559049

申请日：2015-12-08

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Sixin Zhao ,  Liandeng Yao ,  Xiaobo Wang ,  Xiaoting Zhao

IPC分类号： C22C38/58 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D9/46

CPC分类号： C22C38/58 ,  C21D1/18 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0247 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

摘要： Provided is a low-yield-ratio high-strength-toughness thick steel plate with excellent low-temperature impact toughness, which comprises: 0.05%-0.11% of C, 0.10%-0.40% of Si, 1.60%-2.20% of Mn, S≦0.003%, 0.20-0.70% of Cr, 0.20%-0.80% of Mo, 0.02%-0.06% of Nb, 3.60%-5.50% of Ni, 0.01%-0.05% of Ti, 0.01%-0.08% of Al, 0

公开(公告)号：US20180073093A1

公开(公告)日：2018-03-15

申请号：US15559959

申请日：2016-03-22

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Hiroshi OURA ,  Tomokazu MASUDA

IPC分类号： C21D9/02 ,  C22C38/32 ,  C22C38/54 ,  C22C38/46 ,  C22C38/24 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/06 ,  F16F1/02

CPC分类号： C21D9/02 ,  C21D8/065 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/32 ,  C22C38/34 ,  C22C38/46 ,  C22C38/54 ,  F16F1/021 ,  F16F2224/0208 ,  F16F2226/02 ,  F16F2230/0023 ,  F16F2238/026

摘要： To provide a heat-treated steel wire having excellent fatigue-resistance characteristics. The heat-treated steel of the present invention has a predetermined chemical composition, with the balance being iron and inevitable impurities, wherein the heat-treated steel wire includes, in a tempered martensite structure at a depth of 0.3 mm from a surface layer: Cr based carbides having a circle equivalent diameter of 0.1 μm or more and less than 0.3 μm in 0.20 particles/μm2 or less, Cr based carbides having a circle equivalent diameter of 0.3 μm or more and less than 0.7 μm in 0.002 particles/μm2 or less, and Cr based carbides having a circle equivalent diameter of 0.7 μm or more in 0.0010 particles/μm2 or less, and wherein the amount of residual austenite exceeds 5% and 15% or less in terms of a volume ratio.

公开(公告)号：US20180066331A1

公开(公告)日：2018-03-08

申请号：US15565217

申请日：2016-04-08

申请人： SANDVIK INTELLECTUAL PROPERTY AB

发明人： Jari PONSILUOMA ,  Maria HINDRUM ,  Josefin EIDHAGEN ,  Katarina PERSSON ,  Russell P. JONES ,  Asa LARSSON

IPC分类号： C21D8/10 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC分类号： C21D8/105 ,  B21C1/22 ,  C21D6/004 ,  C21D8/10 ,  C21D2211/001 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

摘要： The present disclosure relates to a method of producing a tube of a duplex stainless steel, in particular a duplex stainless steel suitable for use in fuel injection systems for injection of fuel into the combustion chamber of a combustion engine.

公开(公告)号：US20180057916A1

公开(公告)日：2018-03-01

申请号：US15551301

申请日：2016-01-25

申请人： JFE Steel Corporation

发明人： Yoshie OBATA ,  Yoshiyasu KAWASAKI ,  Keiji UEDA ,  Shinjiro KANEKO ,  Takeshi YOKOTA ,  Kazuhiro SETO

IPC分类号： C22C38/14 ,  C21D8/02 ,  C21D9/46 ,  C23C2/06 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C22C38/12

CPC分类号： C22C38/14 ,  C21D8/0236 ,  C21D8/0268 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40

摘要： A steel having a composition containing C: more than 0.20% and 0.45% or less, Si: 0.50% to 2.50%, Mn: 2.00% or more and less than 3.50%, and one or two selected from Ti: 0.005% to 0.100% and Nb: 0.005% to 0.100% is hot-rolled and cold-rolled. The steel sheet is heated to 800° C. to 950° C. and cooled to a cooling-end temperature of 350° C. to 500° C. at a cooling rate of 5° C./s or more to form a steel sheet having a microstructure including martensite and bainite phases such that the total proportion of the martensite and bainite phases is 80% or more by volume. The steel sheet is heated to 700° C. to 840° C. and maintained at 700° C. to 840° C., cooled to a cooling-end temperature of 350° C. to 500° C. at a cooling rate of 5 to 50° C./s, and maintained within the above temperature range for 10 to 1800 s.

公开(公告)号：US09896750B2

公开(公告)日：2018-02-20

申请号：US14419587

申请日：2012-12-28

申请人： POSCO

发明人： You-Hwan Lee ,  Chul-Min Bae ,  Geun-Soo Ryu

IPC分类号： C22C38/16 ,  C21D8/06 ,  C22C38/04 ,  C21D6/00 ,  C21D9/00 ,  C21D9/52 ,  C21D7/13 ,  B21C1/00

CPC分类号： C22C38/16 ,  B21C1/00 ,  C21D6/005 ,  C21D7/13 ,  C21D8/06 ,  C21D8/065 ,  C21D9/0093 ,  C21D9/525 ,  C21D2211/001 ,  C22C38/04

摘要： There are provided a steel wire rod for ultra-high-strength parts such as automobile engine bolts or structural mechanical parts, and a method for producing the steel wire rod. The steel wire rod having high strength and ductility includes, by wt %, carbon (C): 0.7% to 0.9%, manganese (Mn): 13% to 17%, copper (Cu): 1% to 3%, and the balance of iron (Fe) and inevitable impurities.