Microstructures and Wear Resistance in Si-Cr Alloyed High-carbon Steel by Low-temperature Isothermal Quenching Process

2nd International Conference on Frontiers of Materials Synthesis and Processing

Yang, Jing^1^2^3 ; Pan, Mingjian^2 ; Chen, Mingju^2 ; Ma, Xuejiao^2

School of Materials Science and Engineering, Northeastern University, Shenyang, China^1

School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, China^2

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China^3

关键词: Bainitic ferrite;    Bainitic microstructures;    High carbon steels;    Isothermal quenching;    Low temperatures;    Martensitic microstructure;    Retained austenite;    Worn surface morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/493/1/012064/pdf
DOI  :  10.1088/1757-899X/493/1/012064

来源: IOP

【 摘 要 】

The Si-Cr alloyed high-carbon steel was isothermal processed at 200 °C for 8 h after austenizing at 870 °C and 950 °C, respectively, obtaining low temperature bainitic microstructure, which was composed of lath-like bainitic ferrite and film-like retained austenite. The dry sliding wear resistance was measured under the load of 100 N at a rotation rate of 200 r/min. Worn surface morphologies and microstructures of the isothermal transformed samples were analyzed by means of scanning electron microscopy (SEM), optical microscopy (OM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The results show that the wear resistance of the Si-Cr alloyed steel with low-temperature bainitic microstructure is better than that of tempered martensitic microstructure.