接头性能差异对Zr-Sn-Nb合金电子束焊接头残余应力的影响  

Effect of joint property differences on residual stresses in electron beam welded joints of Zr-Sn-Nb alloys

作　　者：赵艳丽 张安锐 辛勇[1] 袁攀 周毅[1] 王厚勤[2] 李赫[2] ZHAO Yanli;ZHANG Anrui;XIN Yong;YUAN Pan;ZHOU Yi;WANG Houqin;LI He(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213;National Key Laboratory of Precision Welding&Joining of Materials and Structures,Harbin Institute of Technology,Harbin,150001)

机构地区：[1]中国核动力研究设计院,核反应堆系统设计技术重点实验室,成都610213 [2]哈尔滨工业大学,材料结构精密焊接与连接全国重点实验室,哈尔滨150001

出　　处：《焊接学报》2024年第5期105-112,共8页Transactions of The China Welding Institution

摘　　要：为了提升Zr-Sn-Nb合金电子束焊残余应力计算精度,对Zr-Sn-Nb合金及焊接接头热物性参数与力学性能进行测量,研究接头性能差异对电子束焊接头残余应力影响规律,建立了电子束焊复合热源模型,采用热弹塑性有限元方法对4.45mm厚Zr-Sn-Nb合金电子束焊应力进行数值模拟,并进行焊缝形貌验证.结果表明,考虑焊缝与母材属性差异时,试板上表面焊缝及热影响区区域的横向残余应力峰值高于二者属性相同时的模拟结果,峰值分别为319 MPa和296 MPa,进一步考虑热影响区属性与母材及焊缝差异对接头残余应力影响不大,峰值纵向应力为318 MPa.In order to improve residual stress numerical simulation accuracy of Zr-Sn-Nb alloy electron beam,thermophysical parameters and mechanical properties of Zr-Sn-Nb alloys and welded joints were measured.and the influence of the difference in joint properties on the residual stress of electron beam welded joints was investigated.The hybrid heat source model of electron beam welding is established,and the thermoelastic-plastic finite element method is used to numerically simulate the stress of electron beam welded 4.45 mm thick Zr-Sn-Nb alloy.The simulation model was verify by weld morphology.The results show that the peak transverse residual stresses in the weld and heat-affected zone region on the upper surface of the test plate are higher than those simulated when the properties of the two are the same,with peaks of 319 MPa and 296 MPa,respectively.The peak longitudinal stress was 318 MPa when the differences in the properties of heat-affected zone and the base material and weld are considered,which has little effect on the residual stresses in the joint.

关 键 词：Zr-Sn-Nb合金 接头性能差异 电子束焊 残余应力 

分 类 号：TG456.3[金属学及工艺—焊接]