Impact Wear and Hardening Mechanism of Explosion Hardening of ZGMn13Cr2 Steel Surface
BA Qinan1, SONG Renbo1, FENG Yifan1, LI Lun2
1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 2 East Anshan Sintering Plant, Anshan Steel Group Corporation Limited, Anshan 114041
Abstract: The surface of ZGMn13Cr2 steel was subjected to an explosion treatment, its impact wear performance and microstructure with different har-dening depths were observed, and the hardening mechanism was analyzed. The results indicate that the hardness of ZGMn13Cr2 steel after explosion treatment decreased with the increase of hardening depth, and the wear resistance is improved by 1.32—1.41 times. Its worn surfaces consist of peeling pits, grooves and a small amount of broken pits. A large number of the deformation twins (hardened layer), domain boundary with high density dislocations (explosion surface), Taylor lattice (10 mm from explosion surface) and parallel slip bands and the intersections of slip bands (20 mm from explosion surface) were observed in the test steel surface with different hardening depths, but there was no martensite, the austenite matrix was mainly observed. Therefore, hardening mechanism of ZGMn13Cr2 steel is mainly dislocation hardening and twins hardening.
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2019, Vol. 33 
