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.
Highlights
Since Sir Robert Hadfield invented Hadfield’s steel in 1882, high manganese austenitic steel has been used in the mining, military, and mechanical industries as a wear-resistant steel, given its excellent work hardening properties under high impact energy conditions [1]
Jing and Jiang [8] discovered that the high-rate work hardening of medium manganese steel under impact abrasion wear is due to the transformation of strain-induced martensite, but they did not research the effect of different impact energies on the work hardening mechanism and degree
The different wear performances of medium manganese austenitic steel (MMAS) are attributed to the synthetic actions of surface hardness, work hardening degree, and wear mechanism influenced by the impact energy
Summary
Since Sir Robert Hadfield invented Hadfield’s steel in 1882, high manganese austenitic steel has been used in the mining, military, and mechanical industries as a wear-resistant steel, given its excellent work hardening properties under high impact energy conditions [1]. In 1963, to improve the work hardening properties under low impact energy conditions, the American Metal Climax company introduced a modified medium manganese wear-resistant steel [5]. Compared with Hadfield steel, medium manganese steel has a higher work-hardening capacity and a better wear-resistant performance under low-stress abrasive conditions [6]. The work hardening ability and the wear-resistant performance of austenitic medium manganese steel increase by 60%−120% (the highest surface hardness is up to 700 HV) and 50%−140%, respectively [7]. The work hardening mechanism and performance of medium manganese austenitic steel have been studied. To increase the surface hardness of medium manganese austenitic steel (MMAS), Xu [10]
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