钼加入量对 Fe-2Cu-0．8C 系烧结合金组织和性能的影响

摘要

采用粉末冶金方法制备了 Fe-2Cu-x Mo-0．8C(x 为0．2~1．2,质量分数/％)合金,研究了钼元素加入量对其显微组织和力学性能的影响.结果表明：随着钼加入量的增多,合金的密度、抗拉强度和伸长率均先增大后减小,当钼质量分数为0．8％时达到最大,分别为6．9 g·cm－3,318 MPa和3．9％,此时合金具有良好的综合性能；钼可促进合金烧结体的致密化,随钼加入量增多,烧结体的孔隙率减小.%The Fe-2Cu-x Mo-0.8C (x changes between 0.2wt% - 1.2wt%)alloys were prepared by powder metallurgy and the effect of molybdenum addition on the microstructure and mechanical properties of the alloy was investigated.The results show that with the increase of molybdenum addition,the sintered density,tensile strength and elongation of the alloy firstly increased then decreased,and reached the maximum value of 6.9 g·cm-3 , 318 MPa,3.9% respectively with molybdenum addition of 0.8wt%,and then obtained excellent comprehensive performance.Molybdenum can promote the densification of Fe-0.5Mn-0.5C compacts.The porosity of the sintered body decreased with the increase of molybdenum addition.