热轧高锰钢Mn13的冲滚磨料磨损性能

Impact and Rolling Abrasive Wear Properties of Hot Rolling Mn13 High Manganese Steel

在M2000摩擦磨损试验机上,研究以煤矸石为磨料时热轧高锰钢Mn13冲滚耦合的磨料磨损性能,利用XRD和SEM分析其组织转变及磨损机制。实验结果表明,在较高冲滚载荷下,热轧Mn13钢表现出更好的抗冲滚磨料磨损性能;冲滚磨料磨损表面存在一定厚度的硬化层,且随冲滚载荷的增加,磨损面硬度增加,硬化层厚度增大,形变孪晶和马氏体相变是其加工硬化和耐磨损性能改善的主要原因;低载荷冲击时,磨损机制主要表现为凿削磨损并伴随犁沟切削磨损,较高载荷冲击时,磨损机制凿削磨损和犁沟划伤过渡到疲劳剥落和凿削磨损。

The impact-rolling abrasive wear properties of hot rolling high manganese steel of Mnl3 were studied under the condition of coal gangue abrasive by the experimental machine of M2000.XRD and SEM were used to investigate the structural transformation and wear mechanism of Mnl3 steel.The results show that the hot rolled steel Mnl3 reveals the better resistance to impact-rolling abrasive wear properties under the high impact loads.The hardened layer with a certain thickness is formed in worn surface.The hardness and thickness of hardened layer are improved with the increasing of impact loads.The deformation twinning and martensite phase transformation are the main reasons to improve the work hardening and wear resistance of hot rolling high manganese steel of Mnl 3.At the low impact loads, the drilling and plowing wear are the main wear mechanism, and at the high impact loads, the wear mechanism changes to fatigue fracture and drilling wear.