论文部分内容阅读
采用电刷镀方法制取了含Cu量分别为1.7、5.7和11.5％(wt,下同)的3种Pb-Sn-Cu三元镀层,以及Sn、Pb两种单金属镀层,并在MM-200型摩擦磨损试验机上于20号机油滴油润滑下就这些软金属镀层的摩擦磨损性能作了对比试验,且对含Cu量为1.7％的Pb-Sn-Cu镀层的摩擦学特性随其厚度的变化作了进一步的研究。结果表明,在载荷为20MPa和滑动速度为0.6m/s的条件下,含Cu量为1.7％之三元镀层的摩擦磨损性能最好,而以含Cu量为11.5％之三元镀层的最差;在载荷为12.5MPa和滑动速度为0.6m/s的条件下,只有当厚度较大(>10μm)时,软金属镀层才具有低的摩擦系数和较长的磨损寿命。在Pb-Sn合金中添加适量(如1.7～5.7％)的Cu,可以提高镀层的耐磨性、承载能力和润滑性,但Cu含量太高(如11.5％)却会使镀层的润滑性和耐磨性变差。
Three kinds of Pb-Sn-Cu ternary coatings with Cu contents of 1.7, 5.7 and 11.5% (wt, the same below) and Sn and Pb single metal coatings were prepared by brush plating. -200 friction and wear testing machine on the 20th oil drip lubrication of these soft metal coating friction and wear properties were compared, and for the amount of 1.7% of the Pb-Pb-Sn-Cu coating tribological properties with its Thickness changes for further study. The results show that under the condition of 20MPa load and 0.6m / s sliding speed, the tribological properties of the ternary coating containing 1.7% Cu is the best, while the ternary coating containing 11.5% Cu Poor; under the conditions of 12.5MPa load and 0.6m / s sliding speed, the soft metal coating has low friction coefficient and long wear life only when the thickness is larger (> 10μm). Adding appropriate amount of Cu (such as 1.7-5.7%) to Pb-Sn alloy can improve the abrasion resistance, bearing capacity and lubricity of the coating, but too high Cu content (such as 11.5%) will make the coating lubricity and Abrasion resistance deteriorates.