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公开(公告)号：EP3608433A1
公开(公告)日：2020-02-12
申请号：EP17904770.9
申请日：2017-04-04
摘要： The present invention relates to steel pipe excellent in toughness of the weld metal part at a low temperature obtained by submerged arc welding in the longitudinal direction from both the inside and outside surfaces having strengths of the X60 to X70 class. The steel pipe of the present invention is a pipe having weld zones welded in a longitudinal direction at an inside surface and outside surface, wherein the tensile strength of the base metal is 480 to 620 MPa, the weld metal has a predetermined composition of constituents, when %X expresses a content of an element X in the weld metal, Pcm defined by
Pcm=%C+%Si/30+(%Mn+%Cu+%Cr)/20+%Ni/60+ %Mo/15+%V/10+5%B is 0.2% or less, Ceq defined by Ceq=%C+%Mn/6+(%Cr+%Mo+ %V)/5+(%Ni+%Cu)/15 is 0.35 to 0.45%, α' defined by α'=(1.5×(%O-0.89%Al)+ 3.4×%N-%Ti)×1000 is -20 to 40, and %Al/%O is 0.3 to 0.8.-
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：EP3608432A1
公开(公告)日：2020-02-12
申请号：EP17904483.9
申请日：2017-04-04
摘要： The present invention relates to steel pipe excellent in toughness of the weld metal part at a low temperature obtained by submerged arc welding in the longitudinal direction from both the inside and outside surfaces having strengths of the X60 to X70 class. The steel pipe of the present invention is a pipe having weld zones welded in a longitudinal direction at an inside surface and outside surface, wherein the tensile strength of the base metal is 480 to 620 MPa, the weld metal has a predetermined composition of constituents, when %X expresses a content of an element X in the weld metal, Pcm defined by Pcm=%C+%Si/30+(%Mn+%Cu+%Cr)/20+%Ni/60+%Mo/15+ %V/10+5%B is 0.2% or less, Ceq defined by Ceq=%C+%Mn/6+(%Cr+%Mo+%V)/5+ (%Ni+%Cu)/15 is 0.35 to 0.45%, and α' defined by α' =(1.5×(%O-0.89%Al)+3.4×%N-%Ti)×1000 is -20 to 40, and %Al/%O is 0.3 to 0.8.
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公开(公告)号：EP4119688A1
公开(公告)日：2023-01-18
申请号：EP21767247.6
申请日：2021-03-12
摘要： A steel plate for wind power generation plants, which has a predetermined chemical composition, and in which, when a plate thickness is set as t in units of mm, a microstructure at a depth position of t/4 from the surface is composed of, in area proportion, ferrite: 50 to 80%, bainite: 20 to 50% and other structures: 0 to 1.0%, wherein an average crystal grain size of the ferrite is 25.0 to 50.0 µm, wherein the porosity volume at a depth position of t/2 from the surface is 0.20×10 -3 cm 3 /g or less, and wherein the plate thickness is 60 mm or more and the plate width is 3,000 mm or more.
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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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6.发明公开HIGH STRENGTH STEEL PIPE AND METHOD FOR PRODUCING SAME 有权VERFAHREN ZU SEINER HERSTELLUNG的HOCHFESTES STAHLROHR
公开(公告)号：EP2441854A1
公开(公告)日：2012-04-18
申请号：EP10785965.4
申请日：2010-06-10
CPC分类号： C22C38/04 , C21D8/02 , C21D9/08 , C21D2211/002 , C22C38/001 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/58
摘要： This high-strength steel pipe includes, by mass%, C: 0.02% to 0.09%, Mn: 0.4% to 2.5%, Cr: 0.1% to 1.0%, Ti: 0.005% to 0.03%, Nb: 0.005% to 0.3%, and a balance consisting of Fe and inevitable impurities, in which Si, Al, P, S, and N are limited to 0.6% or less, 0.1% or less, 0.02% or less, 0.005% or less, 0.008%; or less, respectively, the bainite transformation index BT is 650°C or less, and the microstructure thereof is a single bainite microstructure including first bainite and second bainite, the first bainite being a gathered microstructure of bainitic ferrite including no carbide, and the second bainite being a mixed microstructure of bainitic ferrite including no carbide and cementite between the bainitic ferrites.
摘要翻译： 该高强度钢管以质量％计含有C：0.02％〜0.09％，Mn：0.4〜2.5％，Cr：0.1〜1.0％，Ti：0.005〜0.03％，Nb：0.005〜0.3 ％，余量由Fe，不可避免的杂质组成，其中Si，Al，P，S和N分别为0.6％以下，0.1％以下，0.02％以下，0.005％以下，0.008％以下。 贝氏体相变指数BT为650℃以下，其微结构为包括第一贝氏体和第二贝氏体的单贝氏体组织，第一贝氏体为不包含碳化物的贝氏体铁素体的集聚组织，第二贝氏体组织 贝氏体是贝氏体铁素体之间不含碳化物和渗碳体的贝氏体铁素体的混合微观结构。
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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：EP2332686B1
公开(公告)日：2019-08-14
申请号：EP09809912.0
申请日：2009-08-19
IPC分类号： B23K20/00 , F16L13/02 , B23K20/02 , B23K33/00 , B23K101/06
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9.发明授权
公开(公告)号：EP2028284B1
公开(公告)日：2012-05-16
申请号：EP07740796.3
申请日：2007-03-27
发明人： SHINOHARA, Yasuhiro , ISHITSUKA, Tetsuo , INOUE, Kazuhiro , KATO, Bunshi , TAKAMOTO, Teruhisa , OKAMOTO, Junichi
CPC分类号： B21B23/00 , C21D1/25 , C21D8/10 , C21D9/08 , C21D2211/002 , C21D2211/008 , C22C38/04 , C22C38/12 , C22C38/14
摘要： Disclosed is a high-strength seamless steel pipe for use in a mechanical structure, which has the following chemical composition (by mass): C: not less than 0.03 and less than 0.1%; Mn: 0.8 to 2.5%; Ti: 0.005 to 0.035%; Nb: 0.003 to 0.04%; B: 0.0003 to 0.003%; Si: not more than 0.5%; Al: not more than 0.05%; P: not more than 0.015%; S: not more than 0.008%; and N: not more than 0.008%; and at least one component selected from the following components: Ni: 0.1 to 1.5%; Cr: 0.1 to 1.5%; Cu: 0.1 to 1.0%; and Mo: 0.05 to 0.5%; with the remainder being Fe and unavoidable impurities. In the steel pipe, the metallographic structure is a single structure comprising self-tempered martensite or a mixed structure comprising self-tempered martensite and lower bainite. The high-strength seamless steel pipe has excellent toughness and weldability.
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10.发明公开LIQUID PHASE DIFFUSION BONDING PIPE JOINT AND MANUFACTURING METHOD THEREFOR 有权ROHRVERBINDUNGFÜRFLÜSSIGPHASENDIFFUSIONSBINDUNGUND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2332686A1
公开(公告)日：2011-06-15
申请号：EP09809912.0
申请日：2009-08-19
CPC分类号： B23K20/023 , B23K20/002 , B23K33/006 , B23K2101/06 , F16L13/0227
摘要： A liquid phase diffusion bonded pipe joint comprising metal pipes or a metal pipe and a joint pipe joined by liquid phase diffusion bonding, and a method of production of the same, the liquid phase diffusion bonded pipe joint comprised of a metal joint provided with a tapered slanted part press-fit into an end of a metal pipe by a thrust in a pipe axial direction while expanding the metal pipe in inside diameter and tightly engaging with the end and a joining surface part continuing from the tapered slanted part and joined with an end face of the metal pipe by liquid phase diffusion bonding and a metal pipe tightly engaging with the tapered slanted part in the expanded state and with an end face joined with the joining surface part by liquid phase diffusion bonding.
摘要翻译： 一种液相扩散接合管接头，包括金属管或金属管和通过液相扩散接合连接的接合管及其制造方法，液相扩散接合管接头由金属接头组成，金属接头设有锥形 倾斜部分通过管轴向的推力压入金属管的端部，同时使金属管内径扩大并与端部紧密接合，以及接合表面部分从锥形倾斜部分延伸并与端部 通过液相扩散接合的金属管的表面和与膨胀状态的锥形倾斜部紧密接合的金属管，并且通过液相扩散接合与接合表面部分接合的端面。
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