钨极氩弧焊接汽车离合器盘残余应力和变形的有限元预测  

Finite Element Prediction of Welding Residual Stress and Deformation in TIG Welded Auto Clutch Disc

作　　者：杨永春[1] 

机构地区：[1]新疆交通职业技术学院汽车与机电工程学院,新疆乌鲁木齐831401

出　　处：《热加工工艺》2013年第19期158-161,共4页Hot Working Technology

摘　　要：采用有限元分析软件对20Cr低合金钢汽车离合器盘TIG焊接过程进行数值仿真,预测最优热源参数下焊接变形和残余应力的分布。结果表明:冷却过程中,焊接变形逐渐减小,焊接应力逐渐增大。室温状态时,最大焊接残余变形为0.188334 mm,最大焊接残余应力为679.023 MPa。另外,在焊接起始点位置,由于受两次焊接热循环的影响,该位置具有较小的焊接变形量。The welding process of 20Cr low alloy steel auto clutch disc TIG welding was numerical simulated by finite element analysis software. The distribution of welding residual stress and deformation under optimal heat source parameters were predicted. The results show that during cooling process, the welding deformation gradually decreases, while the welding stress gradually increases. At room temperature, the maximum welding residual deformation is 0.188334 mm, and the maximum welding residual stress is 679.023 MPa. Furthermore, in the position of welding starting point, as for the influence of twice welding heat cycle, the position has a smaller mount of welding deformation.

关 键 词：20 Cr低合金钢 焊接变形 残余应力 有限元 

分 类 号：TG404[金属学及工艺—焊接]