Ni-金刚石复合镀层制备工艺及其性能研究

摘要

In order to study the composite electrodeposition process of diamond consolidated abrasive grinding discs, the preparation technology and properties of Ni-diamond composite coating are studied in this paper.The influences of diamond concentration, current density, temperature and deposition time on the quality of composite coating are studied by scanning electron microscopy, microhardness tester and friction and wear tester.A series of preferred Ni-diamond composite electrodeposition process parameters are obtained: diamond concentration 40 g/L, current density 3 A/dm2, temperature 50 ℃, deposition time 90 min.The surface of Ni-diamond composite coating is flat, the diamond powder has a uniform deposition, and the wear resistance of the composite coating is obviously improved compared with the traditional nickel layer.%为探究金刚石固结磨料研磨盘的复合电沉积制备工艺,对Ni-金刚石复合镀层制备工艺及其性能进行了研究.通过扫描电镜、显微硬度计、摩擦磨损试验机分析研究镀液金刚石浓度、电流密度、温度、沉积时间对复合镀层质量的影响.经试验得到最佳工艺参数:金刚石浓度40 g/L,电流密度3 A/dm2,温度50 ℃,沉积时间90 min.经检测Ni-金刚石复合镀层表面平整,且金刚石粉末沉积均匀,复合镀层的耐磨性能相较于传统的镍层明显提高.