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焊缝余高对复合型坡口X80管线钢多层多道焊接残余应力的影响

刘成,尹立孟,姚宗湘,王刚,王学军

刘成,尹立孟,姚宗湘,王刚,王学军. 焊缝余高对复合型坡口X80管线钢多层多道焊接残余应力的影响[J]. 焊接学报, 2018, 39(12): 100-104. DOI: 10.12073/j.hjxb.2018390306
引用本文: 刘成,尹立孟,姚宗湘,王刚,王学军. 焊缝余高对复合型坡口X80管线钢多层多道焊接残余应力的影响[J]. 焊接学报, 2018, 39(12): 100-104. DOI: 10.12073/j.hjxb.2018390306
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LIU Cheng, YIN Limeng, YAO Zongxiang, WANG Gang, WANG Xuejun. Effect of reinforcement on residual stress of multi-layer and multi-pass welding of composite groove X80 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(12): 100-104. DOI: 10.12073/j.hjxb.2018390306
Citation: LIU Cheng, YIN Limeng, YAO Zongxiang, WANG Gang, WANG Xuejun. Effect of reinforcement on residual stress of multi-layer and multi-pass welding of composite groove X80 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(12): 100-104. DOI: 10.12073/j.hjxb.2018390306
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焊缝余高对复合型坡口X80管线钢多层多道焊接残余应力的影响

Effect of reinforcement on residual stress of multi-layer and multi-pass welding of composite groove X80 pipeline steel

摘要

    摘要
  • 摘要: 基于熔池反演法获取与工程实际一致的热源模型和参数，采用非线性有限元软件MSC. Marc“生死单元”技术对X80管线钢复合型坡口GMAW多层多道焊接过程热–力耦合有限元程序，并进行了数值模拟计算，进一步分析了复合型坡口有无余高两种情况下焊接接头的残余应力分布情况. 结果表明，焊接余高对焊接热循环过程曲线无明显影响，对焊后残余应力影响显著，有余高和无余高的纵向、横向残余应力均呈现“双峰”现象，应力集中于焊趾处；有余高时的纵向与横向峰值应力均高于无余高情况，且超过了X80管线钢的屈服强度.
    Abstract: Based on the pooling inversion method, the heat source model and related parameters matched with the engineering practice were obtained. Birth and death technique of the nonlinear MSC was employed. Marc software was adopted to simulate the GMAW multi-pass welding of X80 pipeline steel with U-V composite groove. Further analysis was carried out to demonstrate the residual stress of the welded joints with the reinforcement and the non-reinforcement. The results showed that both of longitudinal residual stress and transverse residual stress had a “double peak” phenomenon, which was concentrated at the weld toe. The longitudinal and transverse peak stresses were higher than those of the joint with the non-reinforcement, exceeding the base metal yield strength of X80 pipeline.
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    • 参考文献(10)
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  • 收稿日期:  2017-08-30

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