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公开(公告)号：EP3042976B1
公开(公告)日：2020-05-13
申请号：EP14840842.0
申请日：2014-08-29
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公开(公告)号：EP2532765B1
公开(公告)日：2020-01-15
申请号：EP11739858.6
申请日：2011-02-04
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3.发明公开HIGH-STRENGTH WELDED STEEL PIPE AND METHOD FOR PRODUCING THE SAME 审中-公开VERFAHREN ZU DESSEN HERSTELLUNG的HOCHFESTES GESCHWEISSTES STAHLROHR
公开(公告)号：EP2532765A1
公开(公告)日：2012-12-12
申请号：EP11739858.6
申请日：2011-02-04
IPC分类号： C22C38/00 , B21C37/08 , B23K9/025 , B23K9/18 , B23K9/23 , B23K31/00 , C21D8/10 , C21D9/08 , C21D9/50 , C22C38/14 , C22C38/58 , B23K35/30
CPC分类号： B23K35/3053 , B23K31/027 , B23K2101/06 , B23K2103/04 , C21D8/105 , C21D9/08 , C21D9/50 , C21D2211/002 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14 , Y10S148/909
摘要： A high-strength welded steel pipe is obtained by welding a seam weld portion of a steel plate that are formed in a pipe shape. In the high-strength welded steel pipe, a base metal of the steel plate includes, by mass%, C: 0.010% to 0.080%, Si: 0.01% to 0.50%, Mn: 0.50% to 2.00%, S: 0.0001% to 0.0050%, Ti: 0.003% to 0.030%, Mo: 0.05% to 1.00%, B: 0.0003% to 0.0100%, O: 0.0001% to 0.0080%, N: 0.006% to 0.0118%, P: limited to 0.050% or less, Al: limited to 0.008% or less, and the balance of Fe and inevitable impurities, Ceq is 0.30 to 0.53, Pcm is 0.10 to 0.20, [N] - [Ti] /3.4 is less than 0.003, the average grain size of the prior γ grains in heat affected zones in the steel plate is 250 µm or less, and the prior γ grains include bainite and intragranular bainite.
摘要翻译： 通过焊接形成为管状的钢板的焊缝部分来获得高强度焊接钢管。 在高强度焊接钢管中，钢板的贱金属以质量％计含有C：0.010〜0.080％，Si：0.01〜0.50％，Mn：0.50〜2.00％，S：0.0001％ 至0.0050％，Ti：0.003％至0.030％，Mo：0.05％至1.00％，B：0.0003％至0.0100％，O：0.0001％至0.0080％，N：0.006％至0.0118％，P：限于0.050％ 以下，Al：0.008％以下，余量为Fe和不可避免的杂质，Ceq为0.30〜0.53，Pcm为0.10〜0.20，[N] - [Ti] /3.4小于0.003，平均粒径 钢板热影响区域中先前3个晶粒的尺寸为250μm以下，而先前的3个晶粒包括贝氏体和晶粒内贝氏体。
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公开(公告)号：EP4116453A1
公开(公告)日：2023-01-11
申请号：EP20923002.8
申请日：2020-03-04
摘要： What is provided is a steel pipe including a base material portion and a welded portion, in which the base material portion has a predetermined chemical composition, a metallographic structure of a surface layer area in a range of 1 mm of a depth from a surface of the base material portion consists of one or more selected from polygonal ferrite, granular bainite, acicular ferrite, and bainite, a maximum hardness of the base material portion in the surface layer area is 250 HV or less, a yield stress is 415 to 630 MPa, and a proportional limit in a stress-strain curve is 90% or more of the yield stress.
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公开(公告)号：EP2264205B1
公开(公告)日：2019-08-28
申请号：EP09730216.0
申请日：2009-04-07
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6.发明公开HIGH-STRENGTH STEEL PLATE EXCELLENT IN LOW-TEMPERATURE TOUGHNESS, STEEL PIPE, AND PROCESSES FOR PRODUCTION OF BOTH 审中-公开随着对这个优秀的低温强度钢管及方法高强度钢板
公开(公告)号：EP2264205A1
公开(公告)日：2010-12-22
申请号：EP09730216.0
申请日：2009-04-07
CPC分类号： C21D7/12 , B21C37/08 , C21D8/0231 , C21D8/0273 , C21D8/10 , C21D9/08 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , Y10T428/12292 , Y10T428/12653 , Y10T428/12958 , Y10T428/12965 , Y10T428/12972
摘要： The present invention provides high strength steel plate with excellent low temperature toughness, high strength steel pipe using this as a base metal, and methods of production of the same. The steel plate of the present invention contains Mo: 0.05 to 1.00% and B: 0.0003 to 0.0100%, has a Ceq of 0.30 to 0.53, has a Pcm of 0.10 to 0.20, and has a metal structure which has an area percentage of polygonal ferrite of 20 to 90% and has a balance of a hard phase comprised of one or both of bainite and martensite. To obtain this steel plate, strain-introducing rolling is performed with a start temperature of not more than Ar 3 +60°C, an end temperature of Ar 3 or more, and a reduction ratio of 1.5 or more, then the plate is air-cooled and then acceleratedly cooled from Ar 3 -100°C to Ar 3 -10°C in temperature by 10°C/s or more.
摘要翻译： 本发明提供具有优良的低温韧性，以此作为基体金属的高强度钢管，和生产中相同的方法高强度钢板。 本发明的钢板含有Mo：0.05〜1：00％和B：0.0003〜0.0100％，具有12点半一个CEQ到12点53，具有12点10分至12时二十一PCM，并具有具有在多边形区域百分比的金属结构 的20〜90％铁素体和具有由一个的硬质相的平衡或两者贝氏体和马氏体的。 为了获得该钢板，应变导入轧制，进行与Ar 3相以上的最终温度不超过Ar 3相+ 60℃的开始温度，和1.5或更大的压缩比，则所述板是空气 -cooled然后冷却速度加速选自Ar 3 -100℃以10℃/ s以上至Ar在温度3 -10℃。
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公开(公告)号：EP4092149A1
公开(公告)日：2022-11-23
申请号：EP20914216.5
申请日：2020-01-17
摘要： This steel plate has a predetermined chemical composition, a metallographic structure in a thickness middle portion includes, by area%, 0% to 80% of polygonal ferrite and one or two selected from acicular ferrite and bainite, a remainder is an M-A phase, and an effective grain size is 15.0 µm or less, a metallographic structure in a surface layer that is a range of 1.0 mm in a thickness direction from a surface includes, by area%, a total of 95% or more of one or two selected from acicular ferrite and bainite, and a remainder is an M-A phase, and a maximum hardness in the surface layer is 250 HV0.1 or less.
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公开(公告)号：EP2832879B1
公开(公告)日：2019-11-20
申请号：EP13768001.3
申请日：2013-03-29
发明人： HARA, Takuya , FUJISHIRO, Taishi , MURAKI, Taro , SUZUKI, Go
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公开(公告)号：EP2799567B1
公开(公告)日：2019-07-03
申请号：EP12861113.4
申请日：2012-12-27
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