摘要
采用自行改制的MM-200型摩擦磨损试验机研究了Bi对A390过共晶高硅铝合金摩擦磨损性能的影响规律.结果表明,由于Bi的熔点只有270℃,在摩擦过程中容易熔化渗出,并在磨损表面形成铋润滑膜而起到自润滑作用,从而降低合金的摩擦系数,改善其摩擦性能的稳定性,使合金的磨损量及摩擦表面温度降低.当Bi含量为2%-3%时,合金的减摩耐磨性能最佳,其摩擦系数为0.386,磨损量为22.5 mg.
Influence of Bi element on the frictional behavior of A390 alloy was investigated in this paper. It was found that addition of Bi element improved the frictional performance of A390 alloy greatly. Because the melt point of Bi element is low than 270℃, it melted out during friction, then formed effective ＂lubricant monolayer＂ at the friction surface. Consequently, it reduced the friction coefficient and enhanced the stability of friction performance, it also reduced both the wear value and the temperature of the frictional surface, and it so prolonged wear life of A390 alloy. The optimal addition of Bi element is between 2% -3%. When the optimal addition of Bi element is 3%, the alloy exhibited the best wear resistance and antifriction performance. While friction coefficient was 0. 386 and wear volume was 22.5 mg.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2007年第3期284-288,共5页
Tribology
基金
上海市科委专利再创新基金资助项目(04DZ52037)
