提出一种制作CVD金刚石厚膜焊接刀具的新工艺。采用电子辅助化学气相沉积法 (EACVD)制备直径10 0mm、厚度 0 8～ 1mm的金刚石厚膜 ;通过对金刚石刀头表面进行金属化处理 (化学气相沉积W膜 ) ,改善了金刚石的耐高温性及与低熔点合金焊料的浸润性 ,可在大气环境下实现金刚石刀头与刀架的焊接。车削试验结果表明 :用新工艺制作的金刚石刀具适用于精密加工 A new process of making CVD diamond thick film welding tool was proposed. A diamond thick film with a diameter of 10 mm and a thickness of 8 mm to 1 mm was prepared by electron assisted chemical vapor deposition (EACVD). The surface of the diamond saw blade was metallized (CVD W film) to improve the high temperature resistance of the diamond And with low melting point alloy solder infiltration, can be achieved in the atmospheric environment diamond blade head and the tool holder welding. Turning test results show that: with the new diamond cutting tools for precision machining