中文摘要：

用铜锡钛合金钎料对金刚石和45钢进行真空钎焊，分析了钎料和金刚石结合界面的微观结构。结果表明：该钎料对金刚石有良好的润湿性，在金刚石表面生成了不连续、无规则形状的TiC层，TiC层上又生成了树枝状的锡钛化合物，该化合物在界面起到了过渡和桥梁的作用；金刚石与45钢实现了良好的冶金结合。

英文摘要：

The vacuum brazing was performed between diamond and 45 steel with Cu-Sn-Ti alloy brazing filler, and the interracial microstructure between brazing filler and diamond was analyzed. The results show that the brazing filler and diamond had good wetting ability, the non-continuous TiC layer with no-regular shape was found on diamond surface, and the dendritic Sn-Ti compound was found on TiC layer, which played a role of transition and bridge. The diamond and 45 steel had a good metallurgical bonding.