超声冲击改善高强钢焊接接头残余应力的数值模拟分析  

FEM Analysis of Residual Stress Induced by Ultrasonic Impact Treatment in Welded Jionts of High Strength Steel

作　　者：张晓[1] 邵军 姚润钢[1] 王任甫[1] 薛钢[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471039 [2]海军材料工程办公室,辽宁鞍山114000

出　　处：《材料开发与应用》2009年第2期4-6,32,共4页Development and Application of Materials

摘　　要：通过将数值模拟技术应用于超声冲击工艺的研究,合理处理超声冲击加载方式和接触条件,建立了超声冲击工艺有限元分析模型,计算结果与试验结果吻合较好。研究结果表明,10Ni5CrMoV钢焊趾部位存在高达660MPa的残余拉应力,超声冲击技术能够改善其残余应力分布,在焊趾部位形成超过400MPa的残余压应力。Finite clement numerical simulation was applied in the research of ultrasonic impact treatment. With selection of proper loadcase class and contact condiction, a modle of ultrasonic impact treatment was established. The calculation results are in agreement with the experiment results. The results show that tensile residual stresses in the welds of 10Ni5CrMoV steel（Rp0.2≥ 785MPa） is 660MPa , ultrasonic impact treatment has significant effects on the residual stress and introduces compressive redidual stress in the welded joints.

关 键 词：超声冲击 数值模拟 高强钢 残余应力 

分 类 号：TG407[金属学及工艺—焊接]