YG8/GH4169异种材料钎焊接头残余应力的数值模拟  

Numerical simulation of residual stress in YG8/GH4169 dissimilar material brazed joints

作　　者：乔瑞林 龙伟民 秦建 廖志谦[3] 樊喜刚 魏永强[5] QIAO Ruilin;LONG Weimin;QIN Jian;LIAO Zhiqian;FAN Xigang;WEI Yongqiang(State Key Laboratory of Advanced Brazing Filler Metals&Technology,Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou,450001,China;University of Science and Technology Beijing,Beijing,100083,China;Luoyang Ship Material Research Institute,Luoyang,471039,China;Beijing Xinghang Electro-mechanical Equipment Co.,Ltd.,Beijing,100074,China;Zhengzhou University of Aeronautics,Zhengzhou,450046,China)

机构地区：[1]郑州机械研究所有限公司,新型钎焊材料与技术国家重点实验室,郑州450001 [2]北京科技大学,北京100083 [3]洛阳船舶材料研究所,洛阳471039 [4]北京星航机电装备有限公司,北京100074 [5]郑州航空工业管理学院,郑州450046

出　　处：《焊接学报》2024年第3期68-74,I0006,I0007,共9页Transactions of The China Welding Institution

基　　金：国家重点研发计划(2022YFB3402203)。

摘　　要：钻探采样技术是实现月球土壤样本采集的首选方法,针对钻采工具中异种材料钎焊接头残余应力大、连接质量差等问题,以ANSYS有限元软件为平台,采用数值模拟方法,分析了YG8/GH4169钎焊接头残余应力的分布情况,以及添加Cu,Mo中间层时对接头残余应力的影响规律.结果表明,在硬质合金/高温合金钎焊接头中存在极大的残余应力,硬质合金靠近焊缝的顶点附近为应力集中的危险区域,最大轴向残余应力约为1304 MPa;添加Cu,Mo中间层均能有效缓解接头残余应力,当中间层厚度小于0.6 mm时,Cu对接头残余应力的缓解效果更好,中间层厚度大于0.6 mm时,Mo的缓解效果更佳;Cu,Mo作为中间层时,缓解接头残余应力的最佳厚度均为1.0 mm左右,异种材料钎焊接头残余应力的试验结果与数值模拟结果基本吻合.Drilling sampling is the preferred method to achieve lunar soil sample collection.To address the issue of high residual stress and poor connection quality in dissimilar material brazed joints within drilling sampling tools,this paper uses ANSYS finite element software as a platform and a numerical simulation method to study the distribution of residual stress in a YG8/GH4169 brazed joint,as well as the influence of adding Cu and Mo interlayers on the residual stress in the joint.The results indicate that there is a great deal of residual stress in the brazed joint of cemented carbide/superalloy.The dangerous area of stress concentration is the vertex of the cemented carbide near the welding seam,with a maximum axial residual stress of about 1304 MPa.Adding Cu and Mo interlayers can effectively alleviate residual stress in the joint.When the thickness of the interlayers is less than 0.6 mm,Cu has a better relieving effect on residual stress in the joint.When the thickness of the interlayers is greater than 0.6 mm,Mo has a better relieving effect.When Cu and Mo are used as interlayers,the optimal thickness for relieving residual stress in the joint is around 1.0 mm.The experimental results of residual stress in dissimilar materials brazed joints are basically consistent with the numerical simulation results.

关 键 词：数值模拟 残余应力 硬质合金 高温合金 钎焊 

分 类 号：TG454[金属学及工艺—焊接]