摘要
奥氏体不锈钢因其低导热性和大膨胀系数,会导致较高的焊接残余应力。由于通常情况下奥氏体不锈钢不作焊后热处理,探究其焊接残余应力对设计制造及后续安全评定有着重要意义。使用有限元数值模拟、X射线衍射法、应力释放法三中方法针对奥氏体不锈钢焊接残余应力分布展开研究,并比较了三中方法的特点和适用情况,分析了实验值和模拟计算结果之间产生差异的原因,并认为304奥氏体不锈钢的最大焊接残余应力接近甚至超过材料的非比例延伸强度。
High we lding residual stress appears in austenitic stainless steel because of itslow thermal conductivity and high expansion coefficient. It is important to research the welding residual stress for design,manufacture and safety assessment since the heat treatment after welding is not performed in austenitic stainless steel. FEA,XRD and stress release were used and the results were compared to find out the distribution of welding residual stress in austenitic stainless steel. The results showed up that the maximum of welding residual stress in 304 austenitic stainless steel exceeds its non-proportional extension strength.
出处
《机械设计与制造》
北大核心
2016年第2期45-48,共4页
Machinery Design & Manufacture
基金
中央高校基本科研业务费专项资金(222201313014)
国家科技支撑计划(2011BAK06B02-04)
