Thermal shock of subsurface material with plastic flow during scuffing  

作　　者：Chuanwei ZHANG Han ZHAI Dong SUN Dezhi ZHENG Xiaoli ZHAO Le GU Liqin WANG 

机构地区：[1]MIIT Key Laboratory of Aerospace Bearing Technology and Equipment,Harbin Institute of Technology,Harbin 150001,China [2]State Key Laboratory of Robotics and System,Harbin Institute of Technology,Harbin 150080,China

出　　处：《Friction》2023年第1期64-75,共12页摩擦（英文版）

基　　金：We acknowledge the funding from the National Key R&D Program(No.2018YFB 2000301);the National Natural Science Foundation of China(No.U1737204);the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.51571003).

摘　　要：The thermal shock of subsurface material with shear instability and severe plastic flow during scuffing was investigated.The scuffing damage of M50 steel was tested using a high-speed rolling-sliding contact test rig,and the transient temperature during scuffing was calculated using the Fourier transform method considering the effects of both frictional heat and plastic work.The results show that a thermal shock with a rapid rise and subsequent rapid decrease in the contact temperature is generated in the subsurface layers.The frictional power intensity generates a high temperature rise,leading to the austenitization of the subsurface material.Consequently,the plastic flow is generated in the subsurface layer under the high shear stress,and the resulting plastic strain energy generates a further temperature increase.Subsequently,a rapid decrease in the contact temperature quenches the material,resulting in clear shear slip bands and retained austenite in the subsurface layers of the M50 steel.

关 键 词：SCUFFING thermal shock high temperature plastic flow 

分 类 号：TH117[机械工程—机械设计及理论]