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首页> 外文期刊>Journal of Manufacturing Processes >Influence of the groove shape on welding residual stresses in P92/SUS304 dissimilar metal butt-welded joints
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Influence of the groove shape on welding residual stresses in P92/SUS304 dissimilar metal butt-welded joints

机译：沟槽形状对P92 / SU304不同金属对焊接接头焊接残余应力的影响

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摘要

Two dissimilar metal butt-welded joints between P92 steel and SUS304 stainless steel were fabricated with different groove shape, namely single V-groove and X-groove, by gas tungsten arc welding process. Based on Sysweld software, three-dimensional thermal-metallurgical-mechanical coupled finite element analyses were performed to investigate the welding-induced residual stresses in P92/SUS304 dissimilar metal butt-welded joints. Meanwhile, the hole-drilling strain gauge method was used to measure the distributions of residual stresses on the top and bottom surfaces of the two butt-welded joints. The results obtained indicate that the predicted welding residual stresses achieve good levels of agreement with the measurements. In the numerical model, the solid-state phase transformation in P92 steel, the strain hardening and annealing effect in SUS304 stainless steel, and the discrepancy in thermal expansion coefficients between dissimilar metals were carefully considered. The simulated results show that these three factors have significant influence on the formation of longitudinal residual stresses in P92/SUS304 butt-welded joints. In addition, the distribution of welding residual stresses in the butt-welded joint with X-groove was compared with that in the joint with single V-groove. The results suggest that the butt-welded joint with X-groove may be superior to that with single V-groove in reducing the region of high tensile residual stress.
机译：P92钢和SUS304不锈钢之间的两个不同的金属对接接头用不同的凹槽形状，即单个V形槽和X槽，气体钨弧焊工艺制造。基于Sysweld软件，进行三维热冶金 - 机械耦合有限元分析，以研究P92 / SU304不同金属对接接头中的焊接诱导的残余应力。同时，采用空穴钻孔应变计法测量两个对焊接接头的顶部和底表面上的残余应力分布。得到的结果表明，预测的焊接残余应力达到了良好的测量级别。在数值模型中，P92钢中的固态相变，SUS304不锈钢中的应变硬化和退火效果，以及仔细考虑不同金属之间的热膨胀系数的差异。模拟结果表明，这三种因素对P92 / SUS304对接接头中纵向残留的形成具有显着影响。此外，将配合焊接接头中的焊接残余应力与X槽的焊接残余应力分布在与单个V形槽中的关节中进行比较。结果表明，具有X槽的对焊接接头可以优于单个V形槽，在减小高拉伸残余应力的区域中。

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