Brazing Microstructures and Properties of 45 Steel and WC-Co Cemented Carbide

In order to join the grinding head with high-quality and high-efficiency,induction brazing of cemented carbide and the carbon steel was identified.Microstructure and Vickers hardness of the brazed joint was analyzed.Results show:(i) a good brazed joint of the cemented carbide and carbon steel can be acquired with the Cu-Zn filler metal;(ii) α-Cu and Fe-Cu-Zn ternary reaction layer were formed across the joint zone.(iii) microhardness of the cemented carbide was increased significantly due to the quenching effect of the induction heating process.After brazing,the brazed grinding head was electroplated with chromium alloy,the corrosion resistance ability was increased and the appearance was improved.