蒸馏水中TC4合金微动磨损特性

Fretting wear characteristics of TC4 alloy in distilled water

针对TC4合金在蒸馏水中的微动磨损行为,采用典型微动磨损试验分析不同摩擦配副材料下法向载荷与磨损形貌、摩擦因数和磨损性能的关系。研究结果表明:蒸馏水中TC4合金微动磨损机制是疲劳脱层、磨粒磨损;蒸馏水中的摩擦因数曲线呈上下持续波动;在蒸馏水中GCr15/TC4摩擦因数比Si_3N_4/TC4的大,而且后者摩擦因数曲线突变的峰值远比前者的大;载荷增加磨损体积和磨损率均会增大,并且两者的变化趋势与摩擦因数的变化趋势一致;在50,80和100 N这3种载荷下,GCr15/TC4磨损体积和磨损率均比Si_3N_4/TC4的大,Si_3N_4/TC4耐磨性比GCr15/TC4的耐磨性强,蒸馏水中Si_3N_4球作摩擦副材料时耐磨性较强;蒸馏水中TC4合金的腐蚀和磨损交互作用的比率非常小且为负值,说明蒸馏水只有润滑作用,TC4合金的材料流失量主要由机械磨损控制。

The characteristic of fretting wear of TC4 alloy in distilled water were studied and typical fretting wear experiments were made to analyze the relationship between loading,wear scars,the friction coefficient and the wear resistance under different friction counterparts.The results show that the wear mechanism is fatigue delamination and abrasive wear.The friction coefficient curves fluctuate in distilled water.The friction coefficient of GCr15/TC4 is larger than that of Si 3 N 4/TC4 and the peak mutation of Si 3 N 4/TC4 is greatly higher than that of GCr15/TC4 in distilled water.The wear rate and wear volume increases with the increase of load and their variation trend is consistent with that of friction coefficient curve.The wear rate and wear volume of GCr15/TC4 is larger than that of Si 3 N 4/TC4 under different loads(50,80 and 100 N),which means that the abrasion performance of Si 3 N 4/TC4 is better than that of GCr15/TC4,and Si 3 N 4 ball performs the best wear properties in distilled water.The interaction ratio between corrosion and wear in distilled water is negative and accounts for a very small proportion,which indicates that distilled water only acts as lubrication and the material losses of TC4 alloy are determined by mechanical wear.