In order to clarify the role of different post-weld heat treatment processes in the manufacturing process, welding tests, post-weld heat treatment tests, and finite element analysis (FEA) are carried out for 12C1MoV steel pipes. The simulated temperature field and residual stress field agree well with the measured results, which indicates that the simulation method is available. The influence of post-weld heat treatment process parameters on residual stress reduction results is further analyzed. It is found that the post weld dehydrogenation treatment could not release residual stress obviously. However, the residual stress can be relieved by 65% with tempering treatment. The stress relief effect of “post weld dehydrogenation treatment + temper heat treatment” is same with that of “temper heat treatment”. The higher the temperature, the greater the residual stress reduction, when the peak temperature is at 650–750 °C, especially for the stress concentration area. The longer holding time has no obvious positive effect on the reduction of residual stress.

中文翻译：

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12Cr1MoV管焊接接头焊后热处理的优化研究

为了阐明不同的焊后热处理工艺在制造过程中的作用，对12C1MoV钢管进行了焊接测试，焊后热处理测试和有限元分析（FEA）。模拟的温度场和残余应力场与实测结果吻合良好，表明该方法是可行的。进一步分析了焊后热处理工艺参数对残余应力降低结果的影响。发现焊后脱氢处理不能明显释放残余应力。但是，通过回火处理，残余应力可以减轻65％。“焊后脱氢处理+回火热处理”的应力消除效果与“回火热处理”的应力消除效果相同。温度越高 当峰值温度在650-750°C时，残余应力的减小越大，尤其是在应力集中区域。较长的保持时间对减少残余应力没有明显的积极作用。