Comparison on wear resistance of nanostructured bainitic bearing steel with and without residual cementite
作者机构：State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao066004HebeiChina National Engineering Research Center for Equipment and Technology of Cold Rolled StripYanshan UniversityQinhuangdao066004HebeiChina
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2022年第29卷第2期
页 面：339-349页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：The authors acknowledge financial support from the National Key R&D Program of China(2017YFB0304501) the National Natural Science Foundation of China(Nos.51831008,51871192 and 52001275) the Natural Science Foundation of Hebei Province(E2020203058,E2018203271) the Innovation Funding Project for Postgraduate of Hebei Province(CXZZBS2020058).
主 题：Cementite Nanostructured bainite Bearing steel Microstructure Wear resistance
摘 要：The sliding wear property of high-carbon nanostructured bainitic bearing steel with the equal initial hardness and different microstructures was investigated,and the reasons for the difference of wear resistance between the cementite-bearing(CB)and cementite-free(CF)specimens were analyzed.The results show that CF specimens have lower mass loss and surface roughness and shallower wear depth than CB specimens during wear process.Compared with CB specimen,CF specimen presents superior wear resistance.This is due to two reasons:(1)a lot of retained austenite in CF specimen is easy to produce TRIP effect and be transformed into martensite during wear process,which notably increased the surface hardness of worn specimen;(2)there is a nondestructive oxide layer in the surface of cementite-free worn specimen,which can protect the surface of worn specimen from destruction.Under the combined effect of retained austenite and oxide layer,the loss of matrix is reduced.Thus,CF specimen exhibits high wear resistance.It reveals that the wear mechanism of high-carbon nanostructured bainitic bearing steel with different microstructures can provide a reference for improving the wear resistance in high-carbon nanostructured bainitic bearing steel in future.
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