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采用CuMnNi钎料对YG6C硬质合金与16Mn钢的真空钎焊工艺进行研究。通过三点弯曲试验、扫描电镜(SEM)及能谱分析(EDS)等手段探讨了钎焊温度、钎焊间隙大小对钎焊接头组织和性能的影响。结果表明:钎料对两种母材具有良好的润湿性,钎焊温度在965℃、钎缝宽度为0.20mm时,可获得最优钎焊接头,接头抗弯强度达到709MPa。
The CuMnNi brazing filler metal was used to study the vacuum brazing process of YG6C cemented carbide and 16Mn steel. The effects of brazing temperature and brazing gap size on microstructure and properties of brazed joints were discussed by three-point bending test, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results show that the brazing filler metal has good wettability to the two base metals. When the brazing temperature is 965 ℃ and the width of the brazing seam is 0.20mm, the optimal brazing joint is obtained. The bending strength of the joint reaches 709MPa.