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Research Article | Open Access

Effects of impact energy on the wear resistance and work hardening mechanism of medium manganese austenitic steel

Hui CHEN1,2, Dong ZHAO1, Qingliang WANG1(), Yinghuai QIANG1, Jianwei QI1
 School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou 221116, China
 Jiangsu Key Laboratory of Large Engineering Equipment Detection and Control, Xuzhou Institute of Technology, Xuzhou 221111, China
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Abstract

Medium manganese austenitic steel (MMAS) fabricated through the hot rolling process has been used in the mining, military, and mechanical industries. In this paper, the abrasion performance and hardening mechanism were measured under a series of impact energies. The impact wear was tested at different impact energies from 0.5 J to 6 J using a dynamic load abrasive wear tester (MLD-10). Microstructure and surface morphologies were analyzed using scanning electron microscopy, X-Ray diffraction, and transmission electron microscopy. The results suggest that MMSA has the best wear resistance at 3.5 J and the worst wear resistance at 1.5 J. Furthermore, the wear mechanism and worn surface microstructure change with different impact energies. There are small differences between a large amount of martensite on the worn surfaces under different impact energies and the shapes of dislocation and twins change with different impact energies.

Keywords

medium manganese steelimpact abrasion wearwork hardeningtwinmartensitedislocation

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Friction
Volume 5 Issue 4,
December 2017
Pages 447-454
DOI: 10.1007/s40544-017-0158-6
Cite this article:
CHEN H, ZHAO D, WANG Q, et al. Effects of impact energy on the wear resistance and work hardening mechanism of medium manganese austenitic steel. Friction, 2017, 5(4): 447-454. https://doi.org/10.1007/s40544-017-0158-6
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10.1007/s40544-017-0158-6.T001Chemical composition of MMAS steel (wt%).

CMnSiCrVMoSP
0.990.620.150.3< 0.02< 0.02

10.1007/s40544-017-0158-6.T002The amount of martensite on worn surfaces.

Condition0.5 J1 J1.5 J2.5 J3.5 J4 J5 J6 J
Amount of martensite%31.332.133.833.235.535.934.735.2