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1.发明公开METHOD FOR EVALUATING LOCAL BUCKLING CAPABILITY OF STEEL PIPE, METHOD FOR DESIGNING STEEL PIPE, PROCESS FOR PRODUCING STEEL PIPE, AND STEEL PIPE 审中-公开程序评估钢管，法在施工钢管，生产钢管及钢管法的局部VERBIEGUNGSFÄHIGKEIT的
公开(公告)号：EP1843143A1
公开(公告)日：2007-10-10
申请号：EP05820252.4
申请日：2005-12-15
CPC分类号： G01N3/20 , G01N3/08 , G01N2203/0019 , G01N2203/0075 , G01N2203/0218 , G01N2203/0274 , G06F17/50 , G06F2217/34 , Y10T29/49764 , Y10T29/49771 , Y10T29/49776 , Y10T428/12
摘要： A method for evaluating local buckling performance of a steel pipe that can evaluate whether a yield-plateau model steel pipe can be applied to a usage that requires high local buckling performance such as pipelines is provided. A specific solving means includes a first step of obtaining a stress-strain relationship of a material having a yield plateau in the stress-strain relationship; a second step of determining the comparison of a starting strain of strain-hardening in the stress-strain relationship obtained in the first step and a critical strain of the steel pipe; and a third step of evaluating that the steel pipe has a possibility of being applied to a structure that requires plastic design when the critical strain is determined to be larger than the starting strain of strain-hardening in the second step and evaluating that the steel pipe has no possibility of being applied to a structure that requires plastic design when the critical strain is determined to be not larger than the starting strain of strain-hardening in the second step.
摘要翻译： 一种用于评估钢管的局部压曲性能也可以评估是否一个屈服台阶模型钢管可以应用到一个使用方法那样需要高局部压曲性能：如管道设置。 具体解决方式包括获得具有在应力 - 应变关系的屈服台阶的材料的应力 - 应变关系的第一步骤; 确定性采矿的第二步骤应变硬化在第一步骤和钢管的临界应变得到的应力 - 应变关系的起始菌株的比较; 和评估的第三步骤所做的钢管具有被应用到的结构的可能性做需要塑料设计当临界应变确定性开采为比应变硬化在第二步骤中的起始应变较大和评价做了钢管 没有被应用到一结构做了可能性，需要塑料设计当临界应变是确定性的开采为不小于应变硬化在第二步骤中的起始应变大。
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公开(公告)号：EP1717328B1
公开(公告)日：2018-09-12
申请号：EP04801614.1
申请日：2004-12-01
IPC分类号： C22C38/06 , C22C38/40 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/02 , C22C38/04 , C22C38/44 , C21D6/00 , C21D9/14 , C21D1/25 , C22C38/00
CPC分类号： C22C38/44 , C21D1/25 , C21D6/004 , C21D9/14 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/40 , C22C38/46 , C22C38/48 , C22C38/50 , Y10T428/13
摘要： A martensitic stainless steel pipe having a heat-affected zone with high resistance to intergranular stress corrosion cracking is provided. In particular, the martensitic stainless steel pipe contains less than 0.0100% of C; less than 0.0100% of N; 10% to 14% of Cr; and 3% to 8% of Ni on a mass basis. Alternatively, the martensitic stainless steel pipe may further contain Si, Mn, P, S, and Al within an appropriate content range. The martensitic stainless steel pipe may further contain one or more selected from the group consisting of 4% or less of Cu, 4% or less of Co, 4% or less of Mo, and 4% or less of W and one or more selected from the group consisting of 0.15% or less of Ti, 0.10% or less of Nb, 0.10% or less of V, 0.10% or less of Zr, 0.20% or less of Hf, and 0.20% or less of Ta on a mass basis. The content C sol defined by the following equation is equal to less than 0.0050%: C sol = C - 1/3 × C pre , wherein C pre = 12.0 {Ti/47.9 + 1/2 (Nb/92.9 + Zr/91.2) + 1/3 (V/50.9 + Hf/178.5 + Ta/180.9) - N/14.0} or C pre = 0 when C pre
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公开(公告)号：EP1143024B1
公开(公告)日：2005-11-30
申请号：EP99959849.3
申请日：1999-12-16
CPC分类号： C22C38/001 , C22C38/004 , C22C38/44
摘要： A martensitic stainless steel which has a composition in weight % that C: 0.02 % or less, N: 0.02 % or less, Si: 0.1 to 0.3 %, Mn: 0.1 to 0.3 %, Cr: 10 to 13 %, Ni: 5 to 8 %, Mo: 1.5 to 3 %, balance: Fe and inevitable impurities, with the proviso that C+N: 0.02 to 0.04. This steel has excellent resistance to corrosion even when used in an environment wherein wet carbon dioxide and wet hydrogen sulfide are both present, and exhibits reduced increase in hardness after welding, excellent in-place weldability and reduced change in mechanical properties by the fluctuation of production conditions, and thus suitable as a steel for a line pipe.
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