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使用有限元计算方法对06Cr19Ni10奥氏体不锈钢钨极氩弧焊焊接接头进行温度场和残余应力场分析。建立焊接移动热源模型,基于FORTRAN语言使用ABAQUS有限元子程序DFLUX进行编译加载,在焊接线能量400J/mm下获得了最佳接头尺寸。通过等比例改变焊接热源功率和焊接速度研究了温度场和残余应力场变化规律。结果表明:随着焊接热源功率和焊接速度的增加,焊缝中心峰值温度上升,随横向距离的增大,峰值温度差异性减小;而纵缝上残余应力分布变化较小,横缝上残余拉压应力增大。
The finite element method was used to analyze the temperature field and residual stress field of 06Cr19Ni10 austenitic stainless steel TIG welded joints. Based on the FORTRAN language, the ABAQUS finite element subroutine DFLUX was used to compile and load the welding heat source model. The optimal joint size was obtained under the welding line energy of 400 J / mm. By changing the power of welding heat source and welding speed proportionally, the variation rules of temperature field and residual stress field were studied. The results show that with the increase of welding heat source power and welding speed, the peak temperature of weld center increases. With the increase of lateral distance, the difference of peak temperature decreases. However, the variation of residual stress in longitudinal seam is small, Tensile stress increases.