Ni-P-纳米金刚石粉复合电刷镀层的耐磨性研究
Study on Wear-resistance of Ni-P-diamond Composite Coating Prepared by Brush Plating
匡建新, 汪新衡, 刘安民
点击：3539次 下载：0次
作者单位：(湖南工学院 机械工程系, 湖南 衡阳 421002)
中文关键字：纳米金刚石； 电刷镀； 复合镀层； 耐磨性
英文关键字：nano-diamond; brush plating ;composite coating; wear-resistance
中文摘要：研究了纳米金刚石粉对复合电刷镀镀层形成速率、显微硬度和耐磨性的影响；测试了在不同的热处理温度、 载荷及金刚石粉含量下复合刷镀层的耐磨性能； 分析了复合镀层的磨损机理。 结果表明：镀层的磨损体积损失均随热处理温度的升高而下降， 并在400 ℃时达到最小值；载荷增大， 磨损体积损失增大；当纳米金刚石加入量为20～30 g/L时，镀层的耐磨性最好。复合镀层提高耐磨性的原因在于复合粒子在基体金属表面形成突起,起到了支撑载荷、避免粘着磨损及减小摩擦系数的作用。
英文摘要：The effect of nano-diamond powder on the forming speed, microhardness and wear-resistance of compound brush plating Ni-P coating, the wear-resistance of brush plating Ni-P coating, Ni-P nano-diamond composite coating and Ni-P micro-diamond composite coating was tested. The mechanism of improving wear-resistance by of composite coating was analyzed. The results show that the wear-resistance of the coatings decreases with heat-treatment temperature increasing, and the best temperature is 400 ℃. The wear volume loss increases with load increasing; the wear-resistance of the composite coating is best when adding 20 ～ 30 g/L nano-diamond. The wear-resistance of the composite coating improves by sticking out of the base metal, so that it can sustain pressure, avoid adhesion and decrease friction coefficient.