钛合金与不锈钢钎焊接头残余应力有限元分析  

FEM analysis of distribution of residual thermal stress at Ti-alloy/stainless steel brazed joint

作　　者：王国建[1] 周健勇[1] 许芳[1] 孙东[1] 朱颖[2] 

机构地区：[1]中国科学院电子学研究所高功率微波源与技术重点实验室,北京100190 [2]北京航空航天大学机械工程及自动化学院,北京100195

出　　处：《焊接学报》2010年第10期105-109,共5页Transactions of The China Welding Institution

摘　　要：通过有限元分析的方法对TC4钛合金与1Cr18Ni9Ti不锈钢钎焊接头残余应力场进行分析,计算工艺参数对接头应力分布的影响.结果表明,在TC4、不锈钢母材与钎料接头两侧的界面区附近形成应力集中,并且在距离钛合金母材0.45mm处等效应力达到最大值.钎焊间隙在50μm时应力值最小,钎料的线膨胀系数在12×10-6℃-1时接头内应力达到最小值,连接温度对这些残余应力的集中与分布影响很小.The influence of welding parameters on residual stress distribution and the residual stress field of TC4 and 1Cr18Ni9Ti brazed joint were analyzed with finite element model (FEM) method.The results indicate that the stress concentrates on the both sides of joint,becomes the positive maximum on 0.45 mm beside the Ti-alloy,and is the smallest at the gap length of 50 μm and linear expansion coefficient of 12×10-6 ℃-1.Bonding temperature influences little on the stress distribution and stress concentration.

关 键 词：钛合金 残余应力 连接温度 线膨胀系数 

分 类 号：TG454[金属学及工艺—焊接]