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research-article

Impact and rolling abrasive wear behavior and hardening mechanism for hot rolled medium manganese steel

[+] Author and Article Information
Jian Wang

School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, China
278435056@qq.com

Qingliang Wang

School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, China
wql889@cumt.edu.cn

Xiao Zhang

School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, China
825506489@qq.com

Dekun Zhang

School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, China
dkzhang@cumt.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038414 History: Received June 22, 2017; Revised October 30, 2017

Abstract

The coupled impact and rolling wear behaviors of the medium manganese austenitic steel (Mn8) were studied by comparing with the traditional Hadfield (Mn13) steel. Scanning electron microscopy (SEM), X-ray diffractometer (XRD) and transmission electron microscope (TEM) were used to analyze the wear and hardening mechanisms. The experimental results show that the impact and rolling wear resistance of hot-rolled medium manganese steel(Mn8) is better than that of high manganese steel(Mn13) under condition of the low impact load. The better work hardening sensitivity effectively improves the wear resistance of medium manganese steel. Not only the coefficient of friction is low, but the weight loss and wear rate of the wear are lower than that of high manganese steel. After impact and rolling wear, a hardened layer with a thickness of about 600µm is formed on the wear surface. The highest micro-hardness of the sub-surface layer for Mn8 is about 594HV and the corresponding Rockwell hardness is about 55HRC, showing the remarkable work hardening effect. The wear-resistant strengthening mechanism of medium manganese steel is the compound strengthening ,including the deformation induced martensitic transformation, dislocation strengthening and twin strengthening. In initial stage of impact and rolling abrasion, the dislocation strengthening plays a major role. When the deformation reaches a certain extent, the deformation induced martensitic transformation and twinning strengthening begins to play a leading role.

Copyright (c) 2017 by ASME
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