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将机械合金化所制得的铜铬合金粉末,采用热压烧结法制备成石墨/铜铬复合材料,并着重分析了其组织性能。结果表明,随着铬含量的增加,复合材料的相对密度和电导率逐渐降低,硬度逐渐升高,抗弯强度先升后降且于铬含量为1%时达到最大。其中含1%Cr和2%C复合材料的相对密度为99.82%,电导率为85.57%IACS,硬度为HBS 69.34,抗弯强度为330MPa。与常规冷压烧结法相比,热压烧结法所制备复合材料的晶粒更加细小,增强相分布更加均匀,故其综合性能更加优异。
The mechanical alloying copper-chromium alloy powder prepared by hot pressing sintering graphite / copper-chromium composite material, and its organization and performance was analyzed. The results show that with the increase of chromium content, the relative density and electrical conductivity of the composites decrease gradually, the hardness gradually increases, the flexural strength first increases and then decreases, and reaches the maximum when the content of chromium is 1%. The relative density of 1% Cr and 2% C composites was 99.82%, the electrical conductivity was 85.57% IACS, the hardness was HBS 69.34 and the flexural strength was 330 MPa. Compared with the conventional cold-pressed sintering method, the composite grains prepared by the hot-pressing sintering method are more fine grains and more uniform phase distribution, so that the overall performance is more excellent.