[1]刘 斌,等.不同焊接热输入对X90管线钢CGHAZ组织与性能的影响[J].焊管,2019,42(4):25-29.[doi:10.19291/j.cnki.1001-3938.2019.4.005]
 LIU Bin,BI Zongyue,et al.Effect of Different Welding Heat Inputs on CGHAZ Microstructure and Properties of X90 Pipeline Steel[J].,2019,42(4):25-29.[doi:10.19291/j.cnki.1001-3938.2019.4.005]
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不同焊接热输入对
X90管线钢CGHAZ组织与性能的影响
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
42
期数:
2019年第4期
页码:
25-29
栏目:
试验与研究
出版日期:
2019-04-28

文章信息/Info

Title:
Effect of Different Welding Heat Inputs on CGHAZ Microstructure and
Properties of X90 Pipeline Steel
文章编号:
10.19291/j.cnki.1001-3938.2019.4.005
作者:
刘 斌1 2毕宗岳1 2牛 辉1 2赵红波1 2席敏敏1 2黄晓辉1 2
1. 宝鸡石油钢管有限责任公司  钢管研究院, 陕西 宝鸡 721008;
2. 国家石油天然气管材工程技术研究中心, 陕西 宝鸡721008
Author(s):
LIU Bin1 2 BI Zongyue1 2 NIU Hui1 2 ZHAO Hongbo1 2 XI Minmin1 2 HUANG Xiaohui1 2
1. Steel Pipe Research Institute, Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China;
2. Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods, Baoji 721008, Shaanxi, China
关键词:
X90管线钢粗晶热影响区焊接热输入组织性能
Keywords:
X90 pipeline steel coarse grain heat affected zone welding heat input microstructure properties
分类号:
TG113.263
DOI:
10.19291/j.cnki.1001-3938.2019.4.005
文献标志码:
A
摘要:
为了获得X90管线钢埋弧焊接的合理热输入,采用Gleeble-3500型热模拟试验机模拟了不同焊接热输入条件下X90管线钢的热循环过程,同时采用显微组织观察、冲击试验和硬度试验的方法,研究了不同焊接热输入对X90管线钢粗晶热影响区(CGHAZ)组织与性能的影响规律。结果显示,X90管线钢经焊接热模拟后,CGHAZ显微组织主要有贝氏体铁素体、粒状贝氏体和M/A岛组元组成,冲击韧性优异;当焊接热输入E>30 kJ/cm时,显微组织中贝氏体铁素体减少,粒状贝氏体不断增多,晶粒尺寸变大,同时M/A组元也由细小的网状长大成大条状或块状,韧性显著下降,CGHAZ存在软化现象。研究表明,对于X90管线钢的埋弧焊接,当焊接热输入E<30 kJ/cm时可获得良好的综合力学性能。
Abstract:
In order to obtain reasonable heat input of X90 pipeline steel submerged arc welding, thermal cycling processes of X90 pipeline steel under different welding heat input conditions were simulated by Gleeble-3500 thermal simulation test machine, effects of different welding heat inputs on coarse grain heat affected zone (CGHAZ) microstructure and properties of X90 pipeline steel were studied by microstructure analysis, impact test and hardness test. The results showed that the microstructure of X90 pipeline steel CGHAZ after welding thermal simulation were mainly bainite ferrite,granular bainite and M/A constituents with excellent impact toughness. When the welding heat input was above 30 kJ/cm,the bainite and ferrite decreased,the granular bainite increased continuously,grain size increased, the M/A component was also grown from small mesh to large strip or block with toughness obviously reduced, and softening exist in CGHAZ. The study indicated that for submerged arc welding of X90 pipeline steel,excellent comprehensive mechanical properties can be obtained when the welding heat input was less than 30 kJ/cm.

参考文献/References:

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备注/Memo

备注/Memo:
基收稿日期:2018-08-20
金项目: 国家重点研发计划 “低温高压服役条件下高强度管线用钢” (项目编号2017YFB0304900)。
作者简介:刘 斌(1984—),男,硕士,主要从事高钢级大直径埋弧焊管焊接工艺研究及产品开发工作。
更新日期/Last Update: 2019-05-10