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
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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.