HPR1000主管道窄间隙自动焊残余应力分析

徐忠峰; 张汝潺; 朱平; 郭新芳; 王淦刚

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HPR1000主管道窄间隙自动焊残余应力分析
Residual stress analysis on narrow gap automatic welding of HPR1000 main pipe
2019年49卷第7期页码：36-40
纸质出版：2019
DOI：
稿件说明：

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徐忠峰, 张汝潺, 朱平, 等. HPR1000主管道窄间隙自动焊残余应力分析[J]. 电焊机, 2019,49(7):36-40. DOI：

XU Zhongfeng, ZHANG Ruchan, ZHU Ping, et al. Residual stress analysis on narrow gap automatic welding of HPR1000 main pipe[J]. Eletric Welding Machine2019, 49(7): 36-40. DOI：

摘要

针对"华龙一号"主管道锻件全位置窄间隙自动焊和修补焊缝

通过小孔释放法研究了管件内外壁焊缝轴向及环向上的残余应力分布。结果表明

试验件内外壁测量值的分布趋势为:焊缝区、热影响区为拉应力

随着距焊缝距离的增加逐渐减小。由于管道壁厚较大

逐层焊完后

变形叠加

最终累积到最外层焊道

造成试件外壁整体残余应力偏高;试件内壁焊缝中心残余应力达100～150 MPa;管道环切后焊补焊缝外壁焊缝中心残余应力达150～200 MPa。

Abstract

In this paper

the distribution of residual stresses in both transversal and longitudinal directions of the welds on the inner and outer walls of HPR1000 main pipe is studied by means of hole release method. The results show that the distribution trend of the measured values of the inner and outer walls of the specimens is tensile stress in the weld zone and heat-affected zone

and the value far away from the weld gradually decreases. Because of the large wall thickness of the pipeline

and deformation superimposed after layer by layer welding

the residual stress on the outer wall of the test piece is marginally high. The residual stress in the center of the weld seam of the inner wall reaches 100 MPa to 150 MPa. And the residual stress in the center of the outer weld of the repair weld reaches 150 MPa to 200 MPa.