中文摘要：

采用超高频感应连续钎焊工艺,在不同扫描速度条件下实现了立方氮化硼（CBN）磨粒、Ag-Tu-Ti合金以及基体三者之间的钎焊连接。采用扫描电子显微镜（SEM）和X射线能谱仪（EDX）观察钎焊后的CBN磨粒界面新生化合物形貌。结果表明：随着扫描速度的变化,在CBN磨粒表面生成颗粒状TiN化合物以及针状和六棱柱状的TiB2化合物。其中,TiN尺寸为100 nm左右,而TiB2尺寸小于200 nm。在超高频感应连续钎焊CBN磨粒表面首先生成颗粒状TiN层,然后在TiN层外围形成柱状TiB2层,最终形成CBN/TiN/TiB2/钎料结构。当扫描速度为0.5 mm/s时,可以获得较好的界面新生化合物层结构。

英文摘要：

Continuous brazing with ultra-high frequency induction was proposed to braze the cubic born nitride（CBN） grits and steel substrate based on Ag-Cu-Ti filler alloy. The new compounds morphologies were observed and analogized by scanning electron microscopy（SEM） and energy diffraction X-ray（EDX）. The results show that, with the variation of scanning speed, granular compounds Ti N about 100 nm in size, the needle-like and prismatic compounds Ti B2 less than 200 nm in size are observed, respectively. The theoretical analysis results reveal that, during continuous brazing by ultra-high frequency induction, granular Ti N layer forms on the surface of CBN firstly, and then, prismatic Ti B2 layer forms on the outside of the new Ti N layer. The joint is CBN/Ti N/Ti B2/filler structure, finally. A satisfactory interfacial structure can be obtained when scanning speed is 0.5 mm/s.