轴承钢表面镍基纳米金刚石的复合电镀

为提高滚动轴承表面硬度、耐磨性和使用寿命，按均匀试验设计，使用镍基复合电镀技术，探索了纳米金刚石微粒大小、质量浓度、电镀电流密度、镀液成分、温度及pH值等8个因素的各6个水平在不同组合下对轴承表面质量、硬度、结合力和金相组织等镀层性能的影响．试验表明：合适的纳米金刚石微粒大小、质量浓度、电镀电流密度、镀液成分、温度及pH值组合，可以有效提高轴承的表面硬度和耐磨性，表面金相组织均匀致密，从而达到提高轴承使用寿命的目的．

Experimental research of electroplated nickel-nanodiamond composites on bearing steel surface

In order to enhance the surface hardness of steel for bearings, and to improve the wear-resistance to increase the life span of these parts, the influences with respect to bearing surface quality, degree of hardness, binding force and microstructurc of the material are studied by experiments evenly designed, through Nickel base compound electroplating technology. 6 factors with each 6 levels of values are applied, which are nanodiomond particle size, the mass concentration, the electroplating current density, platting fluid ingredient, the temperature, the PH value and so on. The experiment indicates that with proper combination of specific values of the 6 factors it may effectively enhance the bearing surface hardness and improve the wearresistance. The superficial structure is more even and dense. Thus it achieved the goal of increasing the bearing life span.