不锈钢真空钎焊管板连接微观特征及残余应力有限元分析

摘要

采用拉伸试验机对304不锈钢管板结构真空钎焊强度进行了试验,运用金相和EDS方法分析了钎焊接头的微观组织特征.运用有限元ANSYS软件对微小尺寸不锈钢管板结构在真空钎焊过程中产生的残余应力进行了模拟.结果表明,应力集中出现在管板连接钎焊接头处,有限元分析获得了该处的残余应力分布规律.%The intensity of vacuum brazed of 304 stainless steel tube sheet structure has been tested with the tensile testing machine. This paper presented the microstructure characters of brazed joint with metallographic analysis and EDS analysis,studied the residual stress of vacuum brazed of the small size stainless steel tube sheet structure with finite element software ANSYS. The experimental results show that the stress concentration occurs at the joint of the brazed tube sheet, finite element analysis obtains the distribution of the residual stress. [ Ch,7 fig. 4 tab. 10 ref. ]