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首页> 外文会议>International Conference on Physical and Numerical Simulation of Materials Processing >Numerical Simulation of Welding Residual Stress and Post-weld Heat Treatment for Dissimilar Steel Welded Joint
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Numerical Simulation of Welding Residual Stress and Post-weld Heat Treatment for Dissimilar Steel Welded Joint

机译：不同钢焊接接头焊接残余应力和焊接后热处理的数值模拟

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By the finite element analysis software ABAQUS and the function of coupling process between heat and stress, the welding residual stress of Cr5Mo and 20 steel joint was analyzed. In addition the heat treatment of dissimilar steel welded joint was simulated. The residual stress distributions of dissimilar steel welding and heat treatment after welding were obtained. The comparison of welding residual stress between the homogenous steel and dissimilar steel was carried out. The results indicate that the welding residual stress of the same steel is lower than that of dissimilar steel welded joint obviously. Because of the difference of thermal expansion coefficient for base metal and welding microstructure, the relatively higher residual stress is produced due to the bigger thermal expansion coefficient of base metal. The highest annular residual stress is in welding line root of internal wall, while the highest axial residual stress is in welding line surface of outer wall. The welding residual stress of dissimilar welded joint is reduced obviously after heat treatment. The research results provide the possibility for optimizing the welding procedure and improving the reliability of dissimilar steel welding joint.
机译：通过有限元分析软件ABAQUS和热和应力之间的耦合过程的功能，分析了CR5MO和20钢节接头的焊接残余应力。此外，模拟了不同钢焊接接头的热处理。获得焊接后不同钢焊接和热处理的残余应力分布。进行了均匀钢和异种钢之间的焊接残余应力的比较。结果表明，相同钢的焊接残余应力明显低于不同钢焊接接头的焊接残余应力。由于基础金属和焊接微结构的热膨胀系数的差异，因此由于基础金属的热膨胀系数越大，产生了相对较高的残余应力。最高的环形残余应力是内壁的焊接线根，而最高轴向残余应力是外壁的焊接线表面。热处理后，不同的焊接接头的焊接残余应力明显减少。研究结果提供了优化焊接程序和提高不同钢焊接接头可靠性的可能性。

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