Temperature field distribution of weldment, which reflects complex welding heat process, is a basic on studying weldingdeformation, residual stress and so on.
焊件中的温度场分布反映了复杂的焊接热过程，是研究焊接变形、焊后残余应力等状况的基础。
2
There are many factors that can result in the weldingdeformation, like welding procedure or residual stress of the material.
引起焊接变形的因素较多，有可能是焊接工艺引起，也有可能是材料本身残余应力引起。
3
Results show that distribution regularity of residual stress of in-service keeps coherent with routine welding, which measures up deformation mechanism of welding, but numeric value is different.