CAJ | 학술논문

　　对普通中锰钢Mn7进行Ce变质处理和Cr、Ni、Mo和Nb元素合金化，通过销盘式摩擦磨损试验研究Ce变质处理和合金化对中锰钢摩擦磨损性能的影响。结果表明：经过Ce变质处理和合金化后，Mn7钢的晶粒明显细化且基体中弥散分布有较多网状碳化物，其耐磨性是普通Mn7钢的2.5～3倍，且合金发生严重磨损的临界载荷超过了6.63 MPa （≥120 N）。在中低载荷下2种锰钢的磨削机制为切削磨损和塑变磨损；在高载荷下，普通Mn7钢的磨损机制为氧化磨损和塑变磨损，而变质并合金化Mn7钢磨损表面出现了一些氧化物，但仍以塑变磨损机制为主。
　　대보통중맹강Mn7진행Ce변질처리화Cr、Ni、Mo화Nb원소합금화，통과소반식마찰마손시험연구Ce변질처리화합금화대중맹강마찰마손성능적영향。결과표명：경과Ce변질처리화합금화후，Mn7강적정립명현세화차기체중미산분포유교다망상탄화물，기내마성시보통Mn7강적2.5～3배，차합금발생엄중마손적림계재하초과료6.63 MPa （≥120 N）。재중저재하하2충맹강적마삭궤제위절삭마손화소변마손；재고재하하，보통Mn7강적마손궤제위양화마손화소변마손，이변질병합금화Mn7강마손표면출현료일사양화물，단잉이소변마손궤제위주。
Conventional Mn7 steel was modified by Ce and alloyed by Cr,Ni,Mo and Nb. The effects of Ce modification and alloyment on the wear resistance of medium-manganese steel were investigated under different loads by pin-disKfriction testing machine. The results show that the grain of the Ce modified and alloyed Mn7 steel is refined and the dispersion carbide is observed. The wear-resistance of Ce modified and alloyed Mn7 steel is 2.5 to 3 times higher than the conventional Mn7 steel,the critical load that severe wear happened exceeds 6.63 MPa(≥120 N). Under a low or medium load,the main wear mechanism of 2 series manganese steel is micro-cutting and plastic deformation;under a high load,the main wear mechanism of conventional Mn7 steel is oxidational wear and plastic deformation,and the main wear mechanism of Ce modified and alloyed Mn7 steel is still the plastic deformation though some oxide is observed on the surface after sliding friction.