高合金含量的Al Mn,Al Cr合金(质量分数大于10%)中Mn,Cr含量高,传统铸造组织十分粗大,力学性能很差,不能应用.本文采用固液混合铸造技术制备了Al 20%Mn,Al 10%Cr合金.实验结果表明,合金的显微组织明显细化,其平均晶粒尺寸都能控制在10μm以下,且晶粒呈球形或近球形,压铸材料的力学性能为:σb=100～110MPa,σ0.2=70～80MPa.随着粉末加入量的增加,合金晶粒逐渐细化.这两种合金可以应用为耐磨、耐蚀材料. The high content of Mn and Cr in AlMn and AlCr alloy (mass fraction> 10%) is high, the traditional casting structure is very coarse, the mechanical properties are poor and can not be applied.In this paper, Al 20% Mn, Al 10% Cr alloy.The experimental results show that the microstructure of the alloy is obviously refined, the average grain size can be controlled below 10μm, and the grains are spherical or nearly spherical, the mechanical properties of the die-cast material are: σb = 100 ~ 110MPa, σ0.2 = 70 ~ 80MPa.With the increase of the amount of powder, the grain of the alloy is gradually refined.These two kinds of alloys can be used as wear-resistant, corrosion-resistant materials.