(中国科学院 金属研究所，沈阳 110016)
摘 要: 研究了熔铸法制备的CuCr25合金的形变和热处理过程及在不同的冷轧与热处理制度下合金显微组织的特点。试验结果表明，熔铸法制备的CuCr合金具有良好的塑性变形能力，冷轧形变量可达95%以上。当冷轧形变量达到70%以上时，合金中第二相Cr开始产生形变；形变量达95%以上时，Cr粒子产生大量形变，并呈纤维状分布。形变合金在1073K退火1h后，纤维状Cr相发生显著细化和球化，平均半径小于10μm。因而，采用合适的形变与热处理方法可以细化合金中的第二相Cr粒子。
关键字: CuCr合金；形变；热处理；显微组织
refinement of CuCr25 alloy
（Institute of Metal Research，Chinese Academy of Sciences，
Shenyang 110016，China）
Abstract:The deformation and heat treatment of casting CuCr25 alloy were studied for the finer Cr particles in the microstructure. The characteristics of the alloy under different cold rolling reduction and heat treatment temperature were investigated. The results show that，the plasticity of CuCr25 alloy is excellent. The reduction of the casting alloy can be as high as 95% in cold rolling at room temperature. When the reduction is more than 70%，the second phase Cr particles begin to deform，and when the reduction is up to 95%，Cr particles are deformed heavily and form a fiber morphology. After annealing at 1073K for one hour，the fiber of Cr in the microstructure is broken into some short-rod particles，and tend to turn into spherical morphology. The average Cr particle size is less than 10μm. According to these results，the processing of the deformation and heat treatment for the casting CuCr25 alloy is suggested to obtain a finer Cr phase in the microstructure.
Key words: CuCr alloy；deformation；heat treatment；microstructure
