Fe-Mo-(Ni/Cu)-石墨粉末冶金复合材料的制备及组织性能研究

Research on microstructure and properties of Fe-Mo-(Ni/Cu)-graphite composite prepared by powder metallurgy technology

摘要: 采用粉末冶金方法制备了Fe-Mo-Ni-石墨（Fe-Mo-Cu-graphite，FMNG）和Fe-Mo-Cu-石墨（Fe-Mo-Cu-graphite，FMCG）材料，对比研究了Ni及Cu组元对Fe-Mo-石墨材料组织、物相、硬度及抗压强度等的影响。结果表明：烧结态FMNG、FMCG材料组织主要由珠光体、铁素体、贝氏体、石墨及夹杂分布的强化相Mo₂C、Fe₃Mo₃C组成；热处理提高了FMCG/FMNG材料的硬度及抗压强度；FMCG材料的抗压强度高于FMNG材料；FMCG材料的硬度低于FMNG材料。

Abstract: Fe-Mo-Ni-graphite (FMNG) and Fe-Mo-Cu-graphite (FMCG) composites were fabricated by powder metallurgy technology. The effects of Ni and Cu elements on microstructure, composition, hardness, and compressive strength of the prepared composite were investigated. Experimental results show that, the composites are mainly composed of pearlite, ferrites, bainite, Mo₂C and Fe₃Mo₃C strengthening phases, and clustered graphite. The hardness and compressive strength are improved by heat treatment. The hardness of FMCG is lower than that of FMNG. The compressive strength of FMCG is higher than that of FMCG. It is suggested that, the addition of Ni and Cu and the heat treatment can affect the microstructure and properties of the materials.