公开(公告)号：EP2799575A4

公开(公告)日：2015-10-28

申请号：EP12863451

申请日：2012-12-21

申请人： JFE STEEL CORP

发明人： NAKATA HIROSHI ,  SHIBATA TOMOAKI ,  KAMI CHIKARA

IPC分类号： C21D8/02 ,  C21D8/10 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38

CPC分类号： C21D8/0205 ,  B21B1/00 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/105 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

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：EP3318654A4

公开(公告)日：2018-05-30

申请号：EP16850651

申请日：2016-09-26

申请人： JFE STEEL CORP

发明人： NISHIDA SHUJI ,  ISHII TOMOHIRO ,  FUJISAWA MITSUYUKI ,  KAMI CHIKARA

IPC分类号： C22C38/42 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60

CPC分类号： C22C38/00 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60

摘要： Provided is a ferritic stainless steel sheet excellent in terms of corrosion resistance with which a decrease in the quantity of surface defects and an improvement in toughness are realized at the same time. The ferritic stainless steel sheet has a chemical composition containing, by mass%, C: 0.020% or less, Si: 0.05% to 0.40%, Mn: 0.05% to 1.00%, P: 0.040% or less, S: 0.030% or less, Al: 0.001% to 0.15%, Cr: 20.0% to 23.0%, Ni: 0.01% to 0.80%, Cu: 0.30% to 0.80%, Ti: 0.10% to 0.50%, Nb: 0.010% to 0.150%, Zr: 0.005% to 0.150%, N: 0.020% or less, and the balance being Fe and inevitable impurities, in which relational expression (1) below is satisfied. Zr ‰¤ Nb ‰¤ Ti (Here, each of Zr, Nb, and Ti in relational expression (1) denotes the content (mass%) of the corresponding chemical element.)

公开(公告)号：EP3318653A4

公开(公告)日：2018-05-30

申请号：EP16850632

申请日：2016-09-20

申请人： JFE STEEL CORP

发明人： NAKAMURA TETSUYUKI ,  ISHIKAWA SHIN ,  KAMI CHIKARA

IPC分类号： C22C38/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58

CPC分类号： C22C38/00 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58

摘要： Provided is a ferritic stainless steel excellent in oxidation resistance and thermal fatigue resistance. The ferritic stainless steel contains, in mass %, C: 0.020% or less, Si: more than 0.1% and 3.0% or less, Mn: 0.05 to 2.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.3 to 6.0%, N: 0.020% or less, Cr: 12 to 30%, Nb: more than 0.3% and 1.0% or less, Ti: 0.01 to 0.5%, Mo: 0.3 to 6.0%, Co: 0.01 to 3.0%, and Ni: 0.02 to 1.0%, the balance being Fe and unavoidable impurities. Moreover, Si + Al > 1.0%, Al - Mn > 0%, and Nb - Ti > 0% hold.

公开(公告)号：EP3285319A4

公开(公告)日：2018-02-21

申请号：EP16779734

申请日：2016-03-22

申请人： JFE STEEL CORP

发明人： YANO TAKAYOSHI ,  ISHIKAWA SHIN ,  KAMI CHIKARA

IPC分类号： H01M8/0202 ,  C23C28/02 ,  C25D5/12 ,  C25D5/26 ,  C25D5/36 ,  C25D7/00 ,  H01M8/0208 ,  H01M8/021 ,  H01M8/0228 ,  H01M8/10 ,  H01M8/1018

CPC分类号： C25D5/36 ,  C23C28/00 ,  C23C28/32 ,  C23C28/34 ,  C23C28/343 ,  C25D5/12 ,  C25D7/00 ,  H01M8/0202 ,  H01M8/0208 ,  H01M8/021 ,  H01M8/0228 ,  H01M8/10 ,  H01M2008/1095

摘要： A metal sheet for separators of polymer electrolyte fuel cells having both excellent corrosion resistance in the use environment of separators of polymer electrolyte fuel cells and excellent adhesion property between a substrate and a surface-coating layer even in the case where the surface-coating layer is made thinner is provided. A metal sheet for separators of polymer electrolyte fuel cells includes: a substrate made of metal; and a surface-coating layer with which the substrate is coated, with a strike layer in between, wherein a coating weight of the strike layer is 0.001 g/m 2 to 1.0 g/m 2 .

公开(公告)号：EP3121304A4

公开(公告)日：2017-04-26

申请号：EP15764119

申请日：2015-02-25

申请人： JFE STEEL CORP

发明人： FUKUDA KUNIO ,  FUJISAWA MITSUYUKI ,  MIZUTANI AKITO ,  ISHII TOMOHIRO ,  KAMI CHIKARA

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C38/28 ,  C22C38/54

CPC分类号： C21D9/46 ,  C21D1/06 ,  C21D1/74 ,  C21D6/002 ,  C21D6/004 ,  C21D8/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C8/02 ,  C23C8/26 ,  C23C8/80 ,  C23G1/00 ,  C23G1/081 ,  C23G1/086

摘要： Provided is a ferritic stainless steel that has excellent corrosion resistance and displays good brazing properties when brazing is carried out at high temperature using a Ni-containing brazing metal. These effects are obtained as a result of the steel having a chemical composition containing, in mass%: 0.003% to 0.020% of C; 0.05% to 1.00% of Si; 0.10% to 0.50% of Mn, 0.05% or less of P; 0.01% or less of S; 16.0% to 25.0% of Cr; 0.05% to 0.35% of Ti; 0.005% to 0.05% of Al; and 0.005% to 0.025% of N, the balance being Fe and incidental impurities, and as a result of a nitrogen-enriched layer being created that has a nitrogen concentration peak value of 0.05 mass% to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.

摘要翻译： 本发明提供一种铁素体系不锈钢，其使用含Ni的钎焊金属在高温下进行钎焊时，具有优异的耐腐蚀性，并且显示良好的钎焊性。 这些效果是由于具有以质量％计含有C：0.003〜0.020％的化学组成的钢， ，Si：0.05〜1.00％ Mn：0.10〜0.50％，P：0.05％以下; S：0.01％以下; Cr：16.0％〜25.0％ ，Ti：0.05〜0.35％ ，Al：0.005〜0.05％ 以及N：0.005〜0.025％，其余为Fe及不可避免的杂质，在0.05以下的深度形成氮浓度峰值为0.05质量％〜0.30质量％的富氮层 μm的钢的表面。

公开(公告)号：EP3020843A4

公开(公告)日：2016-08-03

申请号：EP14823574

申请日：2014-07-08

申请人： JFE STEEL CORP

发明人： MIYAMOTO YUKA ,  KOBAYASHI TAKASHI ,  KAMI CHIKARA

IPC分类号： C22C38/00 ,  C21D1/32 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  C22C38/32 ,  C22C38/60

CPC分类号： C21D9/46 ,  C21D1/32 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/003 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  C22C38/32 ,  C22C38/60

摘要： Provided is a high-carbon hot-rolled steel sheet whose raw material is a B-containing steel, with which excellent hardenability is stably achieved even if annealing is performed in a nitrogen atmosphere, and which has excellent workability corresponding to a hardness of 65 or less in terms of HRB and a total elongation El of 40% or more before a quenching treatment is performed. A high-carbon hot-rolled steel sheet having a chemical composition containing, by mass%, C: 0.20% or more and 0.48% or less, Si: 0.10% or less, Mn: 0.50% or less, P: 0.03% or less, S: 0.010% or less, sol.Al: 0.10% or less, N: 0.0050% or less, B: 0.0005% or more and 0.0050% or less, one or more of Sb, Sn, Bi, Ge, Te, and Se in an amount of 0.002% or more and 0.030% or less in total, and a microstructure including ferrite and cementite and having a density of cementite in ferrite grains of 0.10 pieces/µm 2 or less.

公开(公告)号：EP2871253A4

公开(公告)日：2015-11-18

申请号：EP13836371

申请日：2013-09-11

申请人： JFE STEEL CORP

发明人： KAMI CHIKARA ,  GOTO SOTA

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

CPC分类号： C22C38/001 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/1222 ,  C21D8/1261 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： Provides is a high strength hot rolled steel sheet with low yield ratio which is excellent in low-temperature toughness and can be preferably used as a raw material of a steel pipe. The steel sheet has a chemical composition containing C: 0.03% or more and 0.10% or less, Si: 0.01% or more and 0.50% or less, Mn: 1.4% or more and 2.2% or less, P: 0.025% or less, S: 0.005% or less, Al: 0.005% or more and 0.10% or less, Nb: 0.02% or more and 0.10% or less, Ti: 0.001% or more and 0.030% or less, Mo: 0.01% or more and 0.50% or less, Cr: 0.01% or more and 0.50% or less, and Ni: 0.01% or more and 0.50% or less, in which the condition that Moeq is 1.4% or more and 2.2% or less is preferably satisfied, and a microstructure in an inner layer including a bainitic ferrite phase as a main phase and, in terms of area fraction, 1.4% or more and 15% or less of a massive martensitic phase having an aspect ratio of less than 5.0 as a second phase, in which the lath thickness of the bainitic ferrite phase is 0.2 µm or more and 1.6 µm or less. It is preferable that the size of the massive martensitic phase be 5.0 µm or less at most and 0.5 µm or more and 3.0 µm or less on average.

公开(公告)号：EP3239315A4

公开(公告)日：2018-01-24

申请号：EP15872143

申请日：2015-11-17

申请人： JFE STEEL CORP

发明人： FUKUDA KUNIO ,  ISHIKAWA SHIN ,  FUJISAWA MITSUYUKI ,  YAMAUCHI KATSUHISA ,  KAMI CHIKARA

IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D1/76 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C8/26

CPC分类号： C23C8/26 ,  C21D1/06 ,  C21D1/76 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： Provided is a ferritic stainless steel having a chemical composition containing, in mass%: 0.003% to 0.025% of C; 0.05% to 1.00% of Si; 0.05% to 1.00% of Mn; 0.04% or less of P; 0.01% or less of S; 16.0% to 23.0% of Cr; 0.20% to 0.80% of Cu; 0.05% to 0.60% of Ni; 0.20% to 0.70% of Nb; 0.005% to 0.020% of N; and the balance being Fe and incidental impurities, in which a nitrogen-enriched layer is present that has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.

公开(公告)号：EP3118342A4

公开(公告)日：2017-03-15

申请号：EP15792676

申请日：2015-05-12

申请人： JFE STEEL CORP

发明人： NAKAMURA TETSUYUKI ,  OTA HIROKI ,  KAMI CHIKARA

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/58

CPC分类号： C22C38/54 ,  C21D6/004 ,  C21D8/0205 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52

摘要： A ferritic stainless steel having an excellent thermal fatigue resistance, an excellent oxidation resistance, and a particularly excellent high-temperature fatigue resistance is provided. A ferritic stainless steel contains, in terms of % by mass, C: 0.020% or less, Si: 3.0% or less, Mn: 2.0% or less, P: 0.040% or less, S: 0.030% or less, Cr: 10.0% to 20.0%, N: 0.020% or less, Nb: 0.005% to 0.15%, Al: 0.20% to 3.0%, Ti: 5 × (C + N)% to 0.50%, Cu: 0.55% to 1.60%, B: 0.0002% to 0.0050%, Ni: 0.05% to 1.0%, O: 0.0030% or less, and the balance being Fe and unavoidable impurities, wherein Al/O ‰¥ 100, where in 5 × (C + N), C and N respectively represent a carbon content and a nitrogen content (% by mass), and in Al/O, Al and O respectively represent an aluminum content and an oxygen content (% by mass).