W与CuCrZr焊接应力的有限元分析及剪切强度的研究  

Finite Element Analysis of Welding Stress and Shearing Strength of W and CuCrZr with OFC Interlayer

作　　者：张庆玲[1] 沈卫平[1] 王占朋[1] 赵晓林[1] 

机构地区：[1]北京科技大学核材料研究所特种陶瓷粉末冶金研究室,北京100083

出　　处：《材料导报》2012年第12期133-136,共4页Materials Reports

基　　金：国家磁约束核聚变能研究专项(2010GB109000);国家重点基础研究发展计划(973计划)项目(2008CB717802)

摘　　要：为了研究应用于聚变试验堆的面向等离子体部件中W与CuCrZr的焊接,选用有限元软件ABAQUS对未用无氧铜箔、或使用不同厚度的无氧铜箔,及在不同温度、压力时的焊接应力进行了有限元分析。实验中使用、或未用无氧铜中间层均成功实现了W与CuCrZr的焊接。测定了焊接试样的剪切强度,并通过SEM观察了其断口形貌。实验结果表明,无氧铜箔的使用大大地提高了焊接强度,最高剪切强度高于198MPa,其剪切断口均位于距离焊缝1mm左右的钨块中,且在钨块中均出现了撕裂现象。ABAQUS有限元数值分析的结果表明,无氧铜箔很好地降低了W与CuCrZr之间的焊接应力,较低的焊接温度、较高的焊接压力、增加无氧铜箔的厚度均有助于减小W与CuCrZr之间的焊接应力。In order to investigate the welding of tungsten and CuCrZr for plasma facing components in a fusion test reactor, the welding stress without oxygenn-free copper foil and with different thicknesses of oxygen-free copper interlayer, under different temperatures and pressures were analyzed by using finite element software ABAQUS. In the experiments, tungsten and CuCrZr were welded successfully using or without using oxygen-flee copper as interlayer. The shear strength of the samples was tested and the micro-fracture morphology was observed by SEM. The results show that oxygen-free copper as interlayer can greatly increase the shear strength, the maximum shear strength is higher than 198MPa,and the shear fracture interface is located just in tungsten at a distance of about lmm from the seam. Results of finite element analysis show that the using of oxygen-free copper as interlayer, lower welding temperature,higher welding pressure, and thicker interlayer of the oxygen free copper can reduce welding stress effectively.

关 键 词：钨 CUCRZR 无氧铜箔 剪切强度 有限元分析 

分 类 号：TG4[金属学及工艺—焊接]