活性钎料真空单层钎焊金刚石

Monolayer Diamond Tools Brazed with Active Filler

应用真空钎焊技术,分别采用含有强碳化物形成元素Cr,Ti的BNi2,CuSnNiTi活性钎料进行金刚石的单层钎焊,通过微分扫描式热分析(DSC)及界面能谱分析(EDS)表明,在一定的钎焊温度、时间及真空度下,金刚石与钎料及基体之间均可形成化学冶金结合,但结合的状况及锯切性能随钎料的不同而改变。磨削试验表明CuSnNiTi钎料制成的磨轮具有较高的锋利度和工作寿命。

Using a commercially available alloy such as BNi2 which contains the active elernents Ti and Cr, and a self-made CuSnNiTi alloy as an active filler materials, a monolayer brazing diamond grinding wheel has been made in a vacuum furnace. Using thermal analysis (DSC) and EDX, it was shown that at appropriate an brazing temperature, duration and vacuum level, chemical bonding takes place among the diamond, brazing alloy and substrate, and that different bonding strengths and performance accompany the use of various brazing filler alloys. Since CuSnNiTi alloy wets the diamond surface, the brazing temperature can be reduced and the bond strength can be enhanced greatly. Grinding tests show that the matrix with this particular filler strongly retains the diamond, and that the cutting efficiency is increased at constant cutting life.