金刚石工具中金刚石与胎体结合力的提高方法

由于金刚石具有高硬度、高强度、高耐磨性等一系列优异的物理化学特性,被广泛地用来制备金刚石工具.但金刚石工具中存在的把持力不足、颗粒脱落、氧化、石墨化等问题,严重影响了工具的使用寿命和效率.文章介绍了提高金刚石工具中金刚石与胎体结合力的两大类方法:用表面金属化、表面粗化方法提高金刚石与胎体机械镶嵌力;用气相沉积法、化学镀而后热处理法、盐浴法使金刚石与金属形成化学键结合.通过实施以上方法可以有效地解决金刚石工具中颗粒的结合力问题.

Methods to enhance bonding strength between diamond and matrix in diamond tools

With a series of excellent physical and chemical properties such as high hardness, high strength, high wear resistance, diamond has been widely introduced into the composite matrix of diamond tools. But the poor retention, grain shedding, oxidation and graphitization have a serious impact on the service life and cutting efficiency of the tools. This paper summarizes the two main categories of methods to enhance bonding strength between diamond and matrix. One is to enhance the mechanical mosaic strength between diamond and the matrix by using diamond surface metallization or surface roughening techniques; the other is to acquire chemical bonding between diamond and metal by using diamond which is treated through techniques like chemical vapor deposition, electroless plating before heat treatment, and salt- bath plating. Through the implementation of the above methods, the bonding strength between diamond and matrix could be enhanced effectively.