Abstract: Aimed at the problems of the austenitic manganese steel, such as the thermal conductivity is poor, the heat is not easy to export and the workpiece is easy to heat deformation, which leads to the processing precision is difficult to guarantee, and the cutting speed cannot be improved, we study the effects of Cr, Mo and rare earth alloy elements on thermal conductivity and wear resistance of the austenitic manganese steel herein. The results showed that the thermal conductivity can be enhanced of 19.6%, the wearing rate is reduced by 54.5%, and crystal grain is improved from grade 3 to 5 comparing austenitic medium manganese steel to the traditional high manganese, when the Cr content is about 1%(?), the content of Mo is about 2%(?), and 0.15%(?) of the rare earth is added.

Key words: austenitic, manganese steel, alloying, rare earth, thermal conductivity, wear resistance

摘要： 针对目前奥氏体中锰钢导热性差、加工时热量不易导出、工件易受热变形而导致加工精度难以保证和切削速度不能提高等问题，研究了Cr, Mo及稀土等合金元素对奥氏体中锰钢热导率及耐磨性能的影响. 结果表明，Cr含量约为1%(?)及Mo含量控制在2%(?)左右、并加入0.15%(?)稀土能使奥氏体中锰钢比传统高锰钢的热导率提高19.6%，磨损率降低54.5%，晶粒度由3级提升至5级.

关键词: 奥氏体, 锰钢, 合金化, 稀土, 热导率, 耐磨性能