电焊机2025，Vol.55Issue(8)：83-89,7.DOI:10.7512/j.issn.1001-2303.2025.08.09
40Cr钢与YG8C硬质合金钎焊工艺研究
Research on Brazing Process of 40Cr Steel and YG8C Hard Alloy
摘要
Abstract
To solve the problem of insufficient brazing joint strength caused by the physical property differences between 40Cr steel and YG8C cemented carbide,induction brazing technology was adopted,using Cu58ZnMn alloy as the brazing filler metal,and the effects of brazing temperature on the wettability of the filler metal,the microstructure of the joint,the el-ement diffusion behavior,and the shear strength were systematically studied.The results show that Cu58ZnMn filler metal has excellent wettability for both base materials(maximum wetting angle≤10°),and the wettability improves significantly with the increase of temperature;the increase of brazing temperature can promote element diffusion and solid solution for-mation,and a continuous diffusion band is formed at both sides of the interface above 940℃,in which the diffusion of Co el-ement across the brazing layer and the formation of Fe-Co solid solution are the key to strengthening the joint;the shear strength of the joint increases first and then decreases with the increase of temperature,reaching the maximum value of 342 MPa at 960℃,and too high temperature(980℃)will cause the appearance of Widmanstätten structure on the 40Cr side,leading to a sharp drop in strength.This study reveals the correlation mechanism of"wettability-diffusion behavior-microstructure strength"under temperature control,determines the optimal brazing process parameters,and provides theo-retical basis and technical reference for high-strength brazing connection of dissimilar materials.关键词
感应钎焊/40Cr钢/YG8C硬质合金/Cu58ZnMn钎料/温度调控/接头强度Key words
induction brazing/40Cr steel/YG8C cemented carbide/Cu58ZnMn filler metal/temperature control/joint strength分类
矿业与冶金引用本文复制引用
陈睿博,郝庆乐,杨雷,吕红英,王珲,钟素娟,王德柱..40Cr钢与YG8C硬质合金钎焊工艺研究[J].电焊机,2025,55(8):83-89,7.基金项目
泰山产业领军人才工程战略性新兴产业创新类 （）
