烧结温度对Fe-Cu-Mo-C合金组织和性能的影响

采用机械球磨混粉和真空烧结相结合的方法制备了Fe-Cu-Mo-C合金,研究了不同烧结温度对粉末冶金Fe-Cu-Mo-C合金材料的显微组织、密度、抗拉强度和摩擦磨损性能的影响。结果表明:随着烧结温度由1 000℃升高到1 100℃,Fe-Cu-Mo-C合金烧结体组织孔隙数量减少、孔隙尺寸明显降低;当烧结温度提高到1 150℃时,烧结体组织中孔隙尺寸增大。随着烧结温度升高,烧结体的密度、硬度、抗拉强度和伸长率先增大后减小,磨损量先降低后升高。最佳烧结温度为1 100℃,此时烧结体的密度为6.90 g/cm3,抗拉强度为319 MPa,洛氏硬度为34.7 HRC,磨损量为0.087 g。

Influence of sintering temperature on microstructure and properties of Fe-Cu-Mo-C alloys

Fe-Cu-Mo-C alloys were prepared by mechanical milling and vacuum sintering. The effect of sintering temperature on the microstructure,density,tensile strength,friction and wear properties of the Fe-based powder metallurgy Fe-Cu-Mo-C was studied. Results show that the pores reduce and its size decreases when sintering tem-perature increases from 1 000℃to 1 100℃;while the pore size increases when sintering temperature increases to 1 150℃. The relative density,hardness,tensile strength and elongation of the sintered body increase firstly and then decrease with the increase of sintering temperature. The mass wear of as-sintered sample decreases firstly and then increases with the increase of sintering temperature. The optimum performance is obtained for samples sin-tered at 1 100℃,with sintered density of 6.90 g/cm3,tensile strength of 319 MPa,hardness of 34.7 HRC and mass loss of 0.087 g.