首页> 外国专利> Administering multilayer prosperous welding which consists of the welding pass of multiple formations in circumferential direction, production manner of the martensite type stainless steel seamless steel tubes circumferential welded joint for the line flexible pipe which is superior in resistance

Administering multilayer prosperous welding which consists of the welding pass of multiple formations in circumferential direction, production manner of the martensite type stainless steel seamless steel tubes circumferential welded joint for the line flexible pipe which is superior in resistance

机译：进行多管齐下的多层焊缝的焊接，在圆周方向上形成多道次焊缝，电阻优异的管线挠性管用马氏体不锈钢无缝钢管周向焊接头的生产方式

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摘要

PROBLEM TO BE SOLVED: To provide a circumferential welding joint of a steel pipe having excellent inter-granular stress corrosion cracking resistance.;SOLUTION: When the circumferential welding joint is formed by butting ends of martensitic stainless steel pipes to each other and by carrying out the welding operation composed of multilayer welding passes in the circumferential direction, the composition of the steel pipe is limited to 0.010 mass% P. By this composition, the generation of the inter-granular stress corrosion cracking in the welding heat affected zone of the circumferential welding joint can be easily prevented. Further, it is preferable that the martensitic stainless steel pipes to be employed contain 0.015 mass% or less C, 0.015 mass% or less N, 10 to 14 mass% Cr, 3 to 8 mass% Ni, and an appropriate quantity of Si, Mn, S, and Al, and further contain one or more elements of 1 to 4 mass% Cu, 1 to 4 mass% Co, 1 to 4 mass% Mo, and 1 to 4 mass% W, one or more elements of 0.15 mass% or less Ti, 0.10 mass% or less Nb, 0.10 mass% or less V, 0.10 mass% or less Zr, 0.20 mass% or less Hf, and 0.20 mass% or less Ta, one or more elements of Ca, Mg, rare earth metal (REM), and B, and the balance of Fe and unavoidable impurities.;COPYRIGHT: (C)2006,JPO&NCIPI

机译：解决的问题：提供一种具有优良的耐晶间应力腐蚀开裂性的钢管的周向焊接头;解决方案：当通过将马氏体不锈钢管的端部彼此对接并进行加工而形成周向焊接头时沿周向进行由多层焊接构成的焊接操作时，钢管的组成被限制为0.010质量％P。通过该组成，在圆周的焊接热影响区域产生晶间应力腐蚀裂纹。焊接接头很容易预防。此外，优选使用的马氏体不锈钢管包含0.015质量％以下的C，0.015质量％以下的N，10〜14质量％的Cr，3〜8质量％的Ni和适量的Si， Mn，S和Al，并且进一步包含一种或多种元素，所述元素为1-4质量％的Cu，1-4质量％的Co，1-4质量％的Mo和1-4质量％的W，一种或多种0.15 Ti，Ca，Mg中的一种或多种元素：Ti，0.10质量％以下Nb，0.10质量％以下V，0.10质量％以下Zr，0.20质量％以下Hf，0.20质量％以下Ta，Ca，Mg中的一种或多种。，稀土金属（REM）和B，以及铁和不可避免的杂质的余量。;版权所有：（C）2006，JPO＆NCIPI

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公开/公告号JP4997695B2

专利类型
公开/公告日2012-08-08

原文格式PDF
申请/专利权人ＪＦＥスチール株式会社;
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申请/专利号JP20040299279
发明设计人宮田由紀夫;木村光男;
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申请日2004-10-13
分类号C22C38;B23K9;B23K9/23;C22C38/58;B23K101/10;B23K103/04;
国家 JP
入库时间 2022-08-21 17:36:44

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