Cu-5%Cr复合材料变形后热处理工艺的研究

Stndy on Heat Treatment Process of Deformed Cu-5%Cr Composite Material

用机械球磨制粉、冷压制坯、高温烧结和热挤压可以得到致密的亚微米晶Cu-5%Cr复合材料,对这类材料冷变形后进行了热处理工艺的研究,并分析了其组织和性能。结果表明,拉拔后Cu-5%Cr材料的再结晶温度为500～520℃。冷变形和退火处理促进了材料中Cr粒子的析出,提高了材料的强度和导电性能。对拉拔变形后的丝材进行退火处理后,发现丝材具有较好的热稳定性。

The Cu-5%Cr composite material with fine microstructure was prepared by mechanical milling, solid state sintering and hot extrusion .The heat treatment process was studied alter cold drawing, and the microstructure and property of the heat treated wire was analyzed. The results show that the recrystallizing temperature of Cu-5%Cr wire is 500-520℃ alter cold drawing. The strength and conductivity of the material increase due to the precipitation of Cr particles alter cold deformation and heat treatment. The result of annealing treatment shows that Cu-5wt%Cr wire has good thermal-stability.