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1. 发明公开

KR20200140907A 극저온용 고장력 후강판 및 그 제조 방법 审中-公开
公开(公告)号：KR20200140907A
公开(公告)日：2020-12-16
申请号：KR20207032994
申请日：2019-05-13
申请人： JFE STEEL CORP
发明人： SATO YUYA , MURAKAMI YOSHIAKI , IGI SATOSHI
IPC分类号： C22C38/08 , C21D8/02 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/58
摘要： Ni 함유량이 9 % 미만이고, 또한 9 % Ni 강판과동등이상의인성과, 우수한냉간가공성을겸비한저온용강판을제공하는것을목적으로한다. 소정의성분조성을갖고, 판두께 1/4 위치에있어서의마이크로조직이, (1) 템퍼드마텐자이트또는템퍼드마텐자이트와베이나이트로이루어지는매트릭스와, (2) 상기매트릭스중에분산된잔류오스테나이트로이루어지고, 판두께 1/4 위치에있어서의잔류오스테나이트의체적률이 11 % 초과, 20 % 이하이고, 또한, -196 ℃의 액체질소중에 15 분유지하는서브제로처리를실시한후의, 판두께 1/4 위치에있어서의잔류오스테나이트의체적률이, 11 % 초과, 20 % 이하인, 극저온용고장력후강판.

2. 发明公开

EP2383360A4 STEEL WITH EXCELLENT ANTI-DUCTILE CRACK GENERATION CHARACTERISTICS IN WELD HEAT-AFFECTED ZONE AND BASE MATERIAL AND MANUFACTURING METHOD THEREFOR 有权
标题翻译：凭借出色的ANTIDUKTILRISSBILDUNGSEIGENSCHAFTEN钢在焊接热影响区和基体材料及其制造方法
公开(公告)号：EP2383360A4
公开(公告)日：2017-03-29
申请号：EP09835126
申请日：2009-12-25
申请人： JFE STEEL CORP
发明人： SADASUE TERUKI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D1/25 , C21D8/02 , C21D9/50 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/60
CPC分类号： C22C38/02 , C21D1/25 , C21D8/0263 , C21D9/50 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18
摘要： This invention relates to steel materials suitable for use in welded structures, such as pipelines, bridges, and architectural structures, requiring structural safety and a method for manufacturing the same and particularly relates to improvement of resistance of ductile crack initiation from welded heat affected zone and a base material. Specifically, a steel material has a composition of C: 0.02 to 0.2%, Si: 0.01 to 0.5%, Mn: 0.5 to 2.5%, P: 0.05% or lower, S: 0.05% or lower, Al: 0.1% or lower, and N: 0.01% or lower and, as required, one or two or more elements selected from Cu: 0.01 to 2%, Ni: 0.01 to 5%, Cr: 0.01 to 3%, Mo: 0.01 to 2%, Nb: 0.1% or lower, V: 0.1% or lower, Ti: 0.1% or lower, B: 0.01% or lower, Ca: 0.01% or lower, and REM: 0.1 % or lower in terms of % by mass, and the balance Fe with inevitable impurities, in which the microstructure at the 1/4 position of the plate thickness contains ferrite and a hard phase, the area fraction of the hard phase is 50 to 90%, and the average aspect ratio of the ferrite is 1.5 or more.
摘要翻译：本发明涉及一种适用于焊接结构，：如管道，桥梁，和建筑结构用钢材，需要结构安全和用于制造相同的，并且具体地涉及改进的延性破裂发生的电阻从焊接热影响区和方法的基材。具体地，钢材料具有℃的组合物：0.02〜0.2％以下，Si：0.01〜0.5％以下，Mn：0.5〜2.5％，P：0.05％以下，S：0.05％或以下，Al：0.1％或更低及N：0.01％或更低，根据需要，由Cu中的一种或两种或多种元素：0.01〜2％以下，Ni：0.01〜5％以下，Cr：0.01〜3％以下，Mo：0.01〜2％以下，Nb ：0.1％以下，V：0.1％以下，钛：0.1％以下，B：0.01％以下，钙：0.01％以下，REM：0.1％或更低的以质量％计，并且与其中在板厚1/4位置处的组织中含有铁素体和硬质相不可避免的杂质余量的Fe，硬质相的面积分数为50〜90％，铁素体的平均纵横比为1.5 以上。

3. 发明专利

CA3094157C RAIL AND METHOD FOR MANUFACTURING SAME 未知
公开(公告)号：CA3094157C
公开(公告)日：2022-11-01
申请号：CA3094157
申请日：2019-03-28
申请人： JFE STEEL CORP
发明人： ANDO KEISUKE , KIMURA TATSUMI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D8/00 , C22C38/34 , C22C38/60
摘要： Provided is a rail in which the characteristics of wear resistance and fatigue damage resistance are both enhanced. The present invention has a component composition containing, so as to satisfy formula (1), 0.70% by mass to 0.85% by mass of C, 0.50% by mass to 1.60% by mass of Si, 0.20% by mass to 1.00% by mass of Mn, 0.035% by mass or less of P, 0.012% by mass or less of S, and 0.40% by mass to 1.30% by mass of Cr, the remainder comprising Fe and unavoidable impurities, the Vickers hardness in a region between a depth positions of 0.5 mm and 25 mm from the surface of a rail head part being 370 HV to less than 520 HV, the total area ratio of a pearlite structure and a bainite structure in the region being 98% or greater, and the area ratio of bainite structure in the region being more than 5% and less than 20%. (1): 0.30 = [%Si]/10 + [%Mn]/6 + [%Cr]/3 = 0.55, where [%M] is the content (% by mass) of element M in the component composition.

4. 发明专利

SG11202108195WA H-BEAM HAVING PROTRUSIONS, AND MANUFACTURING METHOD FOR SAME 未知
公开(公告)号：SG11202108195WA
公开(公告)日：2021-08-30
申请号：SG11202108195W
申请日：2020-01-29
申请人： JFE STEEL CORP
发明人： ANDO KEISUKE , KIMURA TATSUMI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D8/00 , C22C38/14 , C22C38/58
摘要： Provided are an H-shaped steel having protrusions and a production method for same, the H-shaped steel ensuring tensile strength, being capable of suppressing the occurrence of surface cracking during continuous casting, and having dramatically improved manufacturability. A steel composition in which C: 0.05-0.20 mass%, Si: 0.05-0.60 mass%, Mn: 1.20-1.70 mass%, P: 0.035 mass% or less, S: 0.035 mass% or less, Nb: 0.005-0.050 mass%, V: 0.005-0.050 mass%, Ti: 0.005-0.030 mass% and N: 0.0020-0.0100 mass% are included in a range satisfying ([%S]/32)/([%Ti]/48)+4×([%N]/14)/([%Ti]/48)≤15.0, the remainder being Fe and unavoidable impurities, the tensile strength being at least 490 MPa, the yield strength being at least 355 MPa, and the impact absorption energy vE0 at O°C being at least 27J.

5. 发明专利

AU2019242156A1 Rail and method for manufacturing same 未知
公开(公告)号：AU2019242156A1
公开(公告)日：2020-10-08
申请号：AU2019242156
申请日：2019-03-28
申请人： JFE STEEL CORP
发明人： ANDO KEISUKE , KIMURA TATSUMI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D8/00 , C22C38/34 , C22C38/60
摘要： A rail having a component composition containing, in terms of % by mass, 0.70% to 1.00% C, 0.50% to 1.60% Si, 0.20% to 1.00% Mn, 0.035% or less of P, 0.012% or less of S, and 0.40% to 1.30% Cr, the Ceq value defined by the equation Ceq = [%C] + ([%Si]/11) + ([%Mn]/7) + ([%Cr]/5.8) being 1.04 to 1.25, and the remainder being Fe and unavoidable impurities, the hardness in a region between a depth position of 1 mm and a depth position of 25 mm from the surface of a rail head part being 370 HV to less than 520 HV, Ceq(max) being 1.40 or less as determined in accordance with the formula Ceq(max) = [%C(max)] + ([%Si(max)]/11) + ([%Mn(max)]/7) + ([%Cr(max)]/5.8) from the maximum content of the C, Si, Mn, and Cr components obtained by line analysis of the region by an EPMA, and the pearlite area ratio in the region being 95% or greater.

6. 发明专利

CA2977922C STEEL PIPE, STEEL PIPE STRUCTURE, METHOD FOR MANUFACTURING STEEL PIPE, AND METHOD FOR DESIGNING STEEL PIPE 未知
公开(公告)号：CA2977922C
公开(公告)日：2019-09-17
申请号：CA2977922
申请日：2016-03-07
申请人： JFE STEEL CORP
发明人： TAJIKA HISAKAZU , IGI SATOSHI
IPC分类号： B21C37/16 , B21C37/30
摘要： A steel pipe according to the present invention has a waveform shape formed on an outer diameter thereof by a pipe expansion process. The value "a/w" is 0.038% or smaller, where "a" and "w" denote the amplitude and the wavelength of the waveform shape, respectively. It is desirable to arrange the value "w/.lambda." indicating a ratio of the wavelength "w" of the waveform shape to a Timoshenko's buckling wavelength ".lambda." so as to be larger than 0.8. As a result, it is possible to provide a steel pipe of which deformability is improvable, while reducing labor and time required by the pipe expansion process.

7. 发明专利

PH12020550666A1 CORROSION-RESISTANT STEEL MATERIAL FOR DECK PLATE AND BOTTOM PLATE OF CRUDE OIL TANKER AND CRUDE OIL TANKER 未知
公开(公告)号：PH12020550666A1
公开(公告)日：2021-04-26
申请号：PH12020550666
申请日：2020-05-20
申请人： JFE STEEL CORP
发明人： SAMUSAWA ITARU , SHIOTANI KAZUHIKO , TACHIBANA SHUNICHI , IKEDA HIROSHI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/60
摘要： Provided is a corrosion-resistant steel material for a deck plate and a bottom plate of a crude oil tanker which can be used for either the deck plate or the bottom plate and has excellent general corrosion resistance as well as local corrosion resistance. The steel material has a predetermined component composition, the amount of solute Cu in the surface layer of the steel material is 0.40 mass pcnt or less, and the relationship in expression (1) is satisfied. (1): [Percentage of solute Cu]/[percentage of Cu] = 0.35

8. 发明专利

AU2019242158A1 Rail and method for manufacturing same 未知
公开(公告)号：AU2019242158A1
公开(公告)日：2020-10-08
申请号：AU2019242158
申请日：2019-03-28
申请人： JFE STEEL CORP
发明人： ANDO KEISUKE , KIMURA TATSUMI , IGI SATOSHI
IPC分类号： C22C38/00 , C21D8/00 , C22C38/34 , C22C38/60
摘要： Provided is a rail in which the characteristics of wear resistance and fatigue damage resistance are both enhanced. The present invention has a component composition containing, so as to satisfy formula (1), 0.70% by mass to 0.85% by mass of C, 0.50% by mass to 1.60% by mass of Si, 0.20% by mass to 1.00% by mass of Mn, 0.035% by mass or less of P, 0.012% by mass or less of S, and 0.40% by mass to 1.30% by mass of Cr, the remainder comprising Fe and unavoidable impurities, the Vickers hardness in a region between a depth positions of 0.5 mm and 25 mm from the surface of a rail head part being 370 HV to less than 520 HV, the total area ratio of a pearlite structure and a bainite structure in the region being 98% or greater, and the area ratio of bainite structure in the region being more than 5% and less than 20%. (1): 0.30 ≤ [%Si]/10 + [%Mn]/6 + [%Cr]/3 ≤ 0.55, where [%M] is the content (% by mass) of element M in the component composition.

9. 发明专利

PH12018502635A1 WELDED STRUCTURE HAVING EXCELLENT BRITTLE CRACK ARRESTABILITY 未知
公开(公告)号：PH12018502635A1
公开(公告)日：2019-10-07
申请号：PH12018502635
申请日：2018-12-13
申请人： JFE STEEL CORP , JAPAN MARINE UNITED CORP
发明人： HANDA TSUNEHISA , IGI SATOSHI , OI KENJI , TOYODA MASANOBU , KIJI NOBORU
IPC分类号： B23K31/00 , B23K9/00 , B23K9/02 , B63B9/06
摘要： This welded structure is provided with a doubler member (10) disposed at the abutment of a web (1) and a flange (2). The web end surface is abutted against the doubler member surface, the web and the doubler member are joined by fillet welding; the flange surface and doubler member surface are placed overlapping each other and the doubler member is joined with fillet welding. At that time, the relation between the width, in the joint cross section, of the unwelded portion of the overlapping surface of the fillet welded joint, the ratio Y( pcnt ) of the doubler member plate width and the sum of the leg lengths of the left and right fillet welded portions, and the brittle crack arrest toughness (Kca)T(N/mm3/2) of the doubler member at the service temperature (øC) is adjusted to satisfy Y( pcnt ) # {6900-Kca}/85. Thusly, it is possible to prevent and stop propagation of brittle cracks occurring from the flange by means of the doubler member.

10. 发明专利

CA2868973C UOE STEEL PIPE AND STRUCTURE 未知
公开(公告)号：CA2868973C
公开(公告)日：2016-11-01
申请号：CA2868973
申请日：2013-04-02
申请人： JFE STEEL CORP
发明人： TAJIKA HISAKAZU , SAKIMOTO TAKAHIRO , IGI SATOSHI
IPC分类号： B21C37/08 , B21C37/30
摘要： A UOE steel pipe according to the present invention is used for forming a structure by performing butt circumferential welding, and characterized by being shaped to have an outside diameter shape in a waveform in a longitudinal direction. The UOE steel pipe is formed to have no local minimum of the outside diameter shape in the waveform within a predetermined length from both longitudinal end portions. Specifically, a UOE steel pipe according to a first embodiment of the present invention is formed with control to have no local minimum of the outside diameter shape in the waveform within a range from 2.26.lambda. to 3.86.lambda. (where .lambda. is an initial buckling half-wavelength of the UOE steel pipe) from both longitudinal end portions. In a UOE steel pipe according to a second embodiment of the present invention, a flat portion where a variation amount in the pipe diameter is equal to or less than 0.02 percent of an outer diameter of the UOE steel pipe is provided at least to a range of 2.lambda. from both longitudinal end portions in the longitudinal direction.

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