摘要
对重型车辆轴承固定套进行了失效分析,并采用离子氮碳共渗-渗硫复合处理工艺对该45钢轴承固定套进行了表面改性处理。在MM-200型环-块式摩擦磨损试验机上考察了该复合渗层与对偶件———灰口铸铁对磨时的摩擦学性能,采用扫描电镜(SEM)对磨损表面进行了形貌分析。试验结果表明,复合渗层与灰口铸铁对磨时的摩擦系数比未经处理的45钢有明显降低,由于表层的硫化物具有优良的减摩性能,而次表层高硬度的氮碳化合物层具有抗塑变、抗磨粒磨损作用,使复合处理后的45钢的耐磨性明显提高。
Failure mechanism of 45 steel bearing , Academy of Armored Force Engineering, Beijing 100072, China） seating used in heavy vehicle wheel box was analyzed and surface modification was carried out on 45 steel with combined treatment of ion nitrocarburizing and ion sulphurizing. The friction and wear characteristics were tested in a block-ring friction tester, and the worn surfaces were observed under scanning electron microscopy（SEM）. The experimental results reveal that the friction coefficient of the combined treated 45 steel was lower than that of the untreated one against cast iron. The wear resistance of the composite layer was much higher than that of 45 steel because of the good friction-reduction capability of sulphides on surface and the good deformation and wear resistances of nitrocarbonides in the composite layer.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2007年第2期94-96,共3页
Heat Treatment of Metals
基金
武器装备"十五"预先研究项目(41327040202)
关键词
离子氮碳共渗
离子渗硫
轴承固定套
摩擦磨损
ion nitrocarburizing
ion sulphurizing
bearing seating
friction and abrasion
