复合镀覆Ti-Ni金刚石的钎焊应用

Brazing of Ti - Ni Coated Diamonds

镀覆技术的研究进展表明：经过真空微蒸发镀钛、钨的金刚石单晶或聚晶，可以采用化学镀或电镀的方法在钛或钨镀层上进一步镀覆镍、钴、铬等金属，这种复合镀层与金刚石界面强力冶金结合，并且可以采用各种钎焊方法实现金刚石与多种金属基体的焊接。复合镀覆的金刚石可用于各类表镶工具的制造，获得高出刃、高磨粒结合强度，使金刚石表镶工具的使用寿命和加工效率大幅度提高。

Latest developments of coating technology show that, when diamond crystal or PCD is coated with Ti or W by vacuum slow vapor deposition process, it can be further coated with Ni, Co or Cr by electroless plating or electroplating so as to form a composite coating on its surface. Due to the strong metallurgical adhesion between diamond and coating, diamond is easily brazed onto different metal substrate. Composite-coated diamond is mainly used for making surface-set tool to obtain high protrusion height of diamond grit and strong interface adhesion. Thus tool's lifetime and efficiency are improved greatly.