Ce变质和合金化对中锰钢耐磨性的影响  

Effect of Ce Modification and Alloyment on the Wear Resistance of Medium-Manganese Steel

作　　者：杨坤[1] 罗丰华[1] 姚萍屏[1] 黄小琴[1] 付晓虎[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《润滑与密封》2013年第7期22-27,共6页Lubrication Engineering

摘　　要：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6.63MPa(≥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。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.

关 键 词：稀土变质处理 合金化 奥氏体中锰钢 磨粒磨损 氧化磨损 

分 类 号：TG142.25[一般工业技术—材料科学与工程]