Evolution of Fretting Wear Behaviors and Mechanisms of 20CrMnTi Steel after Carburizing

被引:20
作者
Tang, Jinchi [1 ,2 ]
Hu, Xiongfeng [3 ]
Lai, Fuqiang [3 ,4 ]
Guo, Xiaolong [1 ,2 ]
Qu, Shengguan [3 ]
He, Ruiliang [3 ]
Qin, Shunshun [1 ,2 ]
Li, Jianwen [1 ,2 ]
机构
[1] State Key Lab Engine Reliabil, Weifang 261061, Peoples R China
[2] Weichai Power Co Ltd, Weifang 261061, Peoples R China
[3] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510641, Peoples R China
[4] Fuzhou Univ, Sch Mech Engn & Automat, Qishan Campus, Fuzhou 350108, Peoples R China
关键词
valvetrain; carburizing; fretting wear; 20CrMnTi steel; ELECTRONIC-STRUCTURE; FRACTURE-TOUGHNESS; FRICTION; RESISTANCE; CEMENTITE; FATIGUE; CHROMIUM; LOAD;
D O I
10.3390/met10020179
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, the fretting wear properties of 20CrMnTi steel, a common material for a rocker bracket, was discussed for the first time after it was suffered carburizing treatment. Subsequently, the fretting wear behaviors of virgin, quenched, and carburized states were studied. The effect of loads (corresponding to different engine power output) and reciprocating frequencies (corresponding to different engine speed) on wear behaviors and mechanisms of carburized specimen were further discussed. The results showed that the coefficient of friction (CoF) and wear volume loss (WVL) of the carburized specimens were significantly lower than that of virgin and quenched states. During the wear test, the surface CoF decreased gradually with the increase of applied load, while the linear correlation trend was not observed with the increase of fretting frequency as it showed an increase first and then a decrease. It was observed that the WVL increased gradually with the increase of load and frequency. With an increase of the load, the wear mechanism gradually deteriorated from the initial adhesive wear to the mixed wear mechanism. When the load was high, the oxidative wear became more severe. However, no significant effect of frequency was observed on the wear mechanism.
引用
收藏
页数:16
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