【摘要】 采用大气熔铸与形变原位复合的方法制备了Cu-15%Cr形变原位复合材料,测定了不同应变量和中间热处理温度下的显微硬度、抗拉强度和电导率,并研究了Cu-15%Cr原位复合材料的显微组织。结果表明,大气熔铸与真空熔铸制备的Cu-15%Cr复合材料铸态组织没有明显差别;通过改变应变量以及调整中间热处理,可以获得不同的显微硬度、强度和电导率的组合;中间热处理温度在480℃以下,可以获得抗拉强度>1000MPa、电导率>71%IACS的Cu-15%Cr形变原位复合材料,其综合性能与真空熔铸制备的形变Cu-15%Cr原位复合材料相当。更多还原

【Abstract】 Cu-15%Cr in-situ deformation composite was prepared using melting and forging in air and the in-situ production technique, the mircrohardness, tensile strength and electrical conductivity under different strain capacity and different intermediate heat treatment temperature were tested, and the microstruture of Cu-15%Cr in-situ deformation composite was studied. The results show that there isn’t obvious distinction between the as-cast structure of Cu-15%Cr composite prepared by melting-forging in air and in vacuum; Cu-15%Cr composite which have different combination of mircrohardness, strength and electrical conductivity can be obtained through controlling strain capacity and adjusting intermediate heat treatment; while intermediate heat treatment temperature is below 480℃, Cu-15%Cr in-situ deformation composite can be obtained with tensile strength>1 000MPa and electrical conductivity>71%IACS.Its synthetic properties are similar to the composite prepared by melting-forging in vacuum.更多还原