摘要
采用QU-100分别与NM500耐磨钢和0Cr18Ni9Ti不锈钢组成摩擦副,进行高温摩擦磨损实验,研究了温度对其干摩擦磨损性能的影响。结果表明:随着温度的升高,NM500的平均摩擦系数从常温的0.55降至600℃的0.41,磨损率从常温的1.23×10-4 mm3·N-1·m-1降至600℃的0.33×10-4 mm3·N-1·m-1;0Cr18Ni9Ti的平均摩擦系数从常温的0.306升至600℃的0.423,磨损率从常温的1.76×10-4 mm3·N-1·m-1降至600℃的0.81×10-4 mm3·N-1·m-1。高温形变和致密氧化膜的生成使NM500的摩擦系数和磨损率均随温度的升高而降低,而氧化膜的破坏导致0Cr18Ni9Ti的摩擦系数随温度的升高而升高。相同温度下NM500的磨损率小于0Cr18Ni9Ti,前者的耐磨性能优于后者。
An investigation on tribological properties of QU-100 sliding against NM500 or 0Cr18Ni9Ti was carried out using a high-temperature friction and wear tester.As the temperature rose from ambient temperature to 600 ℃,average friction coefficient and wear rate of NM500 decreased from 0.55 to 0.41 and from 1.23×10-4 mm3 · N-1 · m 1 to 0.33 × 10 4 mm3 · N-1 · m-1,respectively,while average friction coefficient and wear rate of 0Cr18Ni9Ti increased from 0.306 to 0.423 and decreased from 1.76 × 10-4 mm3 · N-1 · m-1 to 0.81× 10-4 mm3 · N-1 · m-1,respectively.The deformation at elevated temperature and the tribo-oxidation led to the decrease of NM500＇s friction coefficient and wear rate.In contrast,the friction coefficient would be suddenly increased while the oxide film was broken.The wear rate of NM500 is lower than 0Cr18Ni9Ti at the same temperature,thus the former possesses better wear-resistance than the latter.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第22期96-100,共5页
Materials Reports
