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公开(公告)号：US11167369B2
公开(公告)日：2021-11-09
申请号：US16325524
申请日：2017-09-29
发明人： Yasushi Hasegawa , Hirokazu Okada
IPC分类号： B23K9/23 , B23K9/235 , C22C38/06 , C22C38/00 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/02 , C22C38/04 , C21D9/50 , C21D9/08 , B23K26/24 , B23K9/16 , B23K9/02 , B23K26/60 , B23K26/70 , B23K26/32 , B23K15/00 , B23K103/04 , B23K101/12
摘要： A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 8.0 to 12.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 30 to 100 mm is heated to a temperature of 1050 to 1200° C. and is held at this temperature for 2 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant from the surface of the edge by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 720 to 780° C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1): (Log(t)+12)·(T+273)
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公开(公告)号：US10378091B2
公开(公告)日：2019-08-13
申请号：US15117462
申请日：2015-02-23
发明人： Kana Jotoku , Hiroyuki Hirata , Yoshitaka Nishiyama , Hirokazu Okada , Shinnosuke Kurihara , Yuhei Suzuki
IPC分类号： C22C38/58 , B23K35/30 , B23K35/02 , C22C30/02 , C22C19/05 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , B23K103/04
摘要： A welded joint is obtained by using a welding material having a composition: Cr: 15.0 to 30.0%; and Ni: 40.0 to 70.0%, including: a base material having a composition: C: 0.03 to 0.075%; Si: 0.6 to 2.0%; Mn: 0.05 to 2.5%; P: up to 0.04%; S: up to 0.015%; Cr: more than 16.0% and less than 23.0%; Ni: not less than 20.0% and less than 30.0%; Cu: 0.5 to 10.0%; Mo: less than 1%; Al: up to 0.15%; N: 0.005 to 0.20%; O: up to 0.02%; Ca: 0 to 0.1%; REM: 0 to 0.15%; V: not less than 0% and less than 0.5%; and Nb: 0 to 2%, a balance being Fe and impurities and a first-layer weld metal including Fe content from 10 to 40%, all % by mass.
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公开(公告)号：US20190211411A1
公开(公告)日：2019-07-11
申请号：US16325587
申请日：2017-09-29
发明人： Yasushi Hasegawa , Hirokazu Okada
IPC分类号： C21D6/00 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , B23K9/23
CPC分类号： C21D6/008 , B23K9/23 , C21D6/002 , C21D6/005 , C21D8/02 , C21D8/10 , C21D9/08 , C21D9/50 , C21D2211/005 , C21D2221/02 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32
摘要： A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 1.0 to 7.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 10 to 50 mm is heated to a temperature of 950 to 1050° C. and is held at this temperature for 10 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant therefrom by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 680 to 750° C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1): (Log(t)+10)·(T+273)
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公开(公告)号：US11060156B2
公开(公告)日：2021-07-13
申请号：US16325587
申请日：2017-09-29
发明人： Yasushi Hasegawa , Hirokazu Okada
IPC分类号： C21D6/00 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , B23K9/23 , C21D9/50 , B23K9/235 , C21D9/08
摘要： A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 1.0 to 7.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 10 to 50 mm is heated to a temperature of 950 to 1050° C. and is held at this temperature for 10 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant therefrom by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 680 to 750° C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1): (Log(t)+10)·(T+273)
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公开(公告)号：US10260125B2
公开(公告)日：2019-04-16
申请号：US15194662
申请日：2016-06-28
发明人： Tomohiko Omura , Jun Nakamura , Hirokazu Okada , Hiroyuki Semba , Yusaku Tomio , Hiroyuki Hirata , Masaaki Igarashi , Kazuhiro Ogawa , Masaaki Terunuma
IPC分类号： C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58 , C22C38/52 , C22C38/54 , C21D6/00 , C21D8/02 , C21D1/26 , F16L9/02
摘要： There is provided an austenitic stainless steel for high-pressure hydrogen gas consisting, by mass percent, of C: 0.10% or less, Si: 1.0% or less, Mn: 3% or more to less than 7%, Cr: 15 to 30%, Ni: 10% or more to less than 17%, Al: 0.10% or less, N: 0.10 to 0.50%, and at least one kind of V: 0.01 to 1.0% and Nb: 0.01 to 0.50%, the balance being Fe and impurities, wherein in the impurities, the P content is 0.050% or less and the S content is 0.050% or less, the tensile strength is 800 MPa or higher, the grain size number (ASTM E112) is No. 8 or higher, and alloy carbo-nitrides having a maximum diameter of 50 to 1000 nm are contained in the number of 0.4/μm2 or larger in cross section observation.
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公开(公告)号：US09932655B2
公开(公告)日：2018-04-03
申请号：US14402418
申请日：2013-06-05
CPC分类号： C22C19/056 , C22C19/055 , C22C30/00
摘要： A Ni-based alloy includes, as a chemical composition, C, Si, Mn, Cr, Mo, Co, Al, Ti, B, P, S, and a balance consisting of Ni and impurities. The average grain size d is 10 μm to 300 μm, when the average grain size d is an average grain size in unit of μm of a γ phase included in a metallographic structure of the Ni-based alloy. Precipitates with a major axis of 100 nm or more are absent in the metallographic structure. An area fraction ρ is f2 or more, when the area fraction ρ and the f2 are expressed by using the average grain size d and amounts in mass % of each element in the chemical composition.
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7.发明申请公开(公告)号：US20160304983A1
公开(公告)日：2016-10-20
申请号：US15194662
申请日：2016-06-28
发明人： Tomohiko OMURA , Jun Nakamura , Hirokazu Okada , Hiroyuki Semba , Yusaku Tomio , Hiroyuki Hirata , Masaaki Igarashi , Kazuhiro Ogawa , Masaaki Terunuma
IPC分类号： C21D9/46 , C21D8/02 , C22C38/58 , C22C38/54 , C22C38/52 , C22C38/00 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/02 , C21D6/00 , C22C38/50
CPC分类号： C21D9/46 , C21D1/26 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D2211/001 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , F16L9/02
摘要： There is provided an austenitic stainless steel for high-pressure hydrogen gas consisting, by mass percent, of C: 0.10% or less, Si: 1.0% or less, Mn: 3% or more to less than 7%, Cr: 15 to 30%, Ni: 10% or more to less than 17%, Al: 0.10% or less, N: 0.10 to 0.50%, and at least one kind of V: 0.01 to 1.0% and Nb; 0.01 to 0.50%, the balance being Fe and impurities, wherein in the impurities, the P content is 0.050% or less and the S content is 0.050% or less, the tensile strength is 800 MPa or higher, the grain size number (ASTM E112) is No. 8 or higher, and alloy carbo-nitrides having a maximum diameter of 50 to 1000 nm are contained in the number of 0.4/μm2 or larger in cross section observation.
摘要翻译： 提供了一种用于高压氢气的奥氏体不锈钢，其质量百分比为C：0.10％以下，Si：1.0％以下，Mn：3％以上至小于7％，Cr：15〜 30％，Ni：10％以上至小于17％，Al：0.10％以下，N：0.10〜0.50％，V：0.01〜1.0％中的至少一种，Nb： 0.01〜0.50％，余量为Fe和杂质，其中在杂质中，P含量为0.050％以下，S含量为0.050％以下，拉伸强度为800MPa以上，粒径数（ASTM E112）为8以上，截面观察中最大直径为50〜1000nm的碳氮化合物的含量为0.4个/μm2以上。
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公开(公告)号：US10519533B2
公开(公告)日：2019-12-31
申请号：US15570270
申请日：2016-06-03
发明人： Atsuro Iseda , Hiroyuki Semba , Hirokazu Okada , Hiroyuki Hirata , Toshihide Ono , Katsuki Tanaka , Tomoaki Hamaguchi , Kana Jotoku
IPC分类号： C22C38/60 , C22C38/00 , C21D9/08 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , C21D9/46 , C21D8/00 , C21D6/00
摘要： A high Cr austenitic stainless steel with a chemical composition consisting of in terms of % by mass, 0.03 to 0.12% of C, 0.10 to 1.00% of Si, 0.10 to 3.00% of Mn, 0.030% or less of P, 0.020% or less of S, 21.50 to 28.00% of Cr, more than 26.00 and not more than 35.00% of Ni, more than 2.00 and not more than 5.00% of W, 0.80% or less of Co, 0.01 to 0.70% of V, 0.15 to 1.00% of Nb, 0.001 to 0.040% of Al, 0.0001 to 0.0100% of B, 0.010 to 0.400% of N, 0.001 to 0.200% of Zr, 0.001 to 0.200% of Nd, 0.001 to 0.200% of Ta, 0.020 to 0.200% of Ta+0.8Nd+0.5Zr, 0.025% or less of Ti+Sn+Sb+Pb+As+Bi, 0.0090% or less of O, and a remainder consisting of Fe and impurities.
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公开(公告)号：US20190284666A1
公开(公告)日：2019-09-19
申请号：US16339073
申请日：2017-10-04
IPC分类号： C22C38/58 , C22C38/00 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/50 , C22C38/54 , C22C38/44 , C22C38/42 , C22C38/46 , C22C38/48 , C22C38/52 , C22C30/02
摘要： The NiCrFe alloy according to the present invention has a chemical composition consisting of, in mass %, C: 0.03 to 0.15%, Si: not more than 1.00%, Mn: not more than 2.00%, P: not more than 0.040%, S: not more than 0.0050%, Cr: 18.0 to 25.0%, Ni: 25.0 to 40.0%, Ti: 0.10 to 1.60%, Al: 0.05 to 1.00%, N: not more than 0.020%, O: not more than 0.008%, and rare earth metal (REM): 0.001 to 0.100%, with the balance being Fe and impurities, the chemical composition satisfying Formulae (1) to (3): 0.50≤Ti+48Al/27≤2.20 (1) 0.40≤Ti/(Ti+48Al/27)≤0.80 (2) Σ[REM/(A(REM))]−S/32−2/3.O/16≥0 (3) where, each symbol of element in the formulae is substituted by the content (mass %) of the corresponding element, and A(REM) in Formula (3) is substituted by the atomic weight of each rare earth metal.
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10.发明申请公开(公告)号：US20190210137A1
公开(公告)日：2019-07-11
申请号：US16325524
申请日：2017-09-29
发明人： Yasushi Hasegawa , Hirokazu Okada
IPC分类号： B23K9/23 , B23K9/235 , C22C38/06 , C22C38/00 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/02 , C22C38/04 , C21D9/50
CPC分类号： B23K9/23 , B23K9/235 , B23K15/00 , B23K31/00 , B23K2103/04 , C21D9/08 , C21D9/50 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 8.0 to 12.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 30 to 100 mm is heated to a temperature of 1050 to 1200° C. and is held at this temperature for 2 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant from the surface of the edge by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 720 to 780° C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1): (Log(t)+12)·(T+273)
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