用强氧化技术提高电镀金刚石工具的使用性能

Improving the properties of electroplated diamond tools by strong oxidation treatment

分别用经强氧化处理和未经强氧化处理的金刚石制备了电镀金刚石工具。对陶瓷材料进行钻削加工,来测试两种不同金刚石制备工具的使用寿命及性能。通过扫描电子显微镜观察金刚石工具的表面形貌,结果表明,经强氧化处理的金刚石颗粒表面存在有较大粗糙的凹坑,金刚石颗粒表面的凹坑提高了镀层对金刚石颗粒的把持力,增强了"机械锚链"效应,工具表面镍瘤现象大为改善,镍瘤的减少提高了金刚石的加工效率和加工精度;其氧化铝陶瓷材料去除体积是未经强氧化处理金刚石电镀钻头的1.3倍,明显提高了电镀金刚石工具的磨削性能和使用寿命。

Two different kinds of diamond tools were prepared using ordinary diamond and special diamond treated by strong oxidation method. Their properties and service life were tested through an granite cutting experiment. The morphology of the tools was observed by SEM. The results show that the contact area and mechanical interlocking between diamond grains and matrix were improved due to lots of concaves appearing on the surface of diamond grains after surface strong oxidation treatment. The cutting efficiency and precision were greatly increased due to the decrease of nodules on the surface of diamond tools. The material removal amount of improved diamond tool using surface treated diamond is 1.3 times that of the tools prepared with ordinary diamond. The properties and service life of electroplated diamond tools were obviously improved by the surface treatment technology.