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研究了形变热处理及时效对Cu-1.0Cr-0.2Zr合金组织和性能的影响。结果表明:合金在960℃固溶2 h,经60%冷变形再在450℃时效4 h的综合性能最佳,合金的抗拉强度和伸长率分别为527.4 MPa和12.3%,电导率为82.1%IACS。合金的综合性能最佳归结于在基体上析出了两种细小且弥散分布的第二相,第一种相为铬相并以六边形和球状两种形态存在,第二种相为CrCu2Zr相,且这些弥散分布的第二相减缓了回复及随后的再结晶过程。析出相的逐渐析出,导致基体贫化并减弱了基体对电子散射的作用,使电导率恢复到较高的水平。
The effect of deformation heat treatment and aging on microstructure and properties of Cu-1.0Cr-0.2Zr alloy was studied. The results show that the alloy has the best comprehensive properties after solution treatment at 960 ℃ for 2 h, 60% cold deformation and 450 ℃ for 4 h. The tensile strength and elongation of the alloy are 527.4 MPa and 12.3% respectively, and the conductivity is 82.1 % IACS. The best overall performance of the alloy due to the precipitation of two fine and dispersed in the matrix of the second phase, the first phase is chromium and hexagonal and spherical two forms exist, the second phase is CrCu2Zr phase , And these dispersedly dispersed second phases slow the recovery and the subsequent recrystallization process. Precipitation of the precipitated phase results in depletion of the matrix and weakening of the matrix’s effect on electron scattering, resulting in the recovery of electrical conductivity to a higher level.