Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第24卷    第9期    总第186期    2014年9月

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文章编号:1004-0609(2014)09-2280-07
扩散焊接钨/钢接头残余应力的数值模拟
马运柱,刘昊阳,刘文胜,蔡青山,余 强,刘书华,伍 镭

(中南大学 粉末冶金研究院,长沙 410083)

摘 要: 采用有限元法分析钨/钢扩散焊接头残余应力,并探讨添加钒/镍和钒/铜复合中间层对钨/钢扩散焊接头残余应力分布的影响。结果表明:钨/钢扩散焊接头存在较大的残余应力,靠近中间层附近的钨处存在极大的径向压应力,而靠近中间层附近的钢处和整个中间层区域均存在较大径向拉应力;钨/钢直接扩散焊接头的残余应力极大,钨/钒/镍/钢扩散焊接头的残余应力有所降低,钨/钒/铜/钢扩散焊接头残余应力最小;接头力学性能及断裂特征验证了有限元计算结果的准确性。

 

关键字: 钨;钢;残余应力;扩散焊;数值模拟

Numerical simulation of residual stress in tungsten/steel diffusion bonded joints
MA Yun-zhu,LIU Hao-yang,LIU Wen-sheng,CAI Qing-shan,YU Qiang,LIU Shu-hua,WU Lei

State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

Abstract:A finite element method was employed to evaluate the residual stresses in W/FS (ferritic steel) joints,and the influences of V/Ni and V/Cu composite interlayer on residual stress distribution of W/FS joints were discussed. The results show that large residual stress is generated in W/FS diffusion bonded joints. The maximum compressive residual stress is presented in the tungsten near interlayer,while large tensile residual stress is shown in interlayer and steel near interlayer as well. The residual stress of W/FS direct diffusion bonded joint is the largest,the residual stress of W/V/Ni/FS joint is lower,and the residual stress of W/V/Cu/FS joint is the least. The tensile strength of the joints and fracture characteristics verify the accuracy of calculation results of the FEA.

 

Key words: tungsten; steel; residual stress; diffusion bonding; numerical simulation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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