(1. 河南科技大学 材料科学与工程学院，洛阳471003;
2. 河南科技大学 河南省有色金属材料科学与加工技术重点实验室，洛阳 471039)
摘 要: 采用真空熔铸与形变相结合的方法制备高强高导Cu-Cr-Zr原位复合材料，利用SEM和TEM分析材料在铸态及变形态的显微组织，研究不同变形量和中间热处理对Cu-Cr-Zr原位复合材料的抗拉强度和导电率的影响。结果表明：Cu-Cr-Zr合金经室温冷变形，Cr相由铸态树枝状转变为纤维状；中间热处理能够明显提高材料的导电率；采用500 ℃中间热处理并结合冷变形，能得到具有较好综合性能的Cu-Cr-Zr原位复合材料，其抗拉强度达到1 119 MPa，导电率(vs IACS)达到76%。
关键字: Cu-Cr-Zr合金；原位复合材料；高强度；高导电；显微组织
（1. School of Materials Science and Engineering, Henan University of Science and Technology,
Luoyang 471003, China;
2. Henan Key Laboratory of Advanced Non-ferrous Metals,
Henan University of Science and Technology, Luoyang 471039, China）
Abstract:The Cu-Cr-Zr in-situ composites with high strength and high electrical conductivity were prepared by melting in vacuum combined with the deformation. The microstructures of the composites in the as-cast and deformation were examined by SEM and TEM. The effects of the deformation and the intermediate heat treatment on the tensile strength and electrical conductivity of the Cu-Cr-Zr in-situ composites were investigated. The results show that the Cr dendrites in the as-cast Cu-Cr-Zr alloy are drawn into fibers by the cold deformation at room temperature. The electrical conductivity of the Cu-Cr-Zr in-situ composites can be increased by the intermediate heat treatment. After the intermediate heat treatment at 500 ℃ and the cold deformation, the Cu-Cr-Zr in-situ composites show an excellent combination of the tensile strength of 1 119 MPa and electrical conductivity of 76% (vs IACS).
Key words: Cu-Cr-Zr alloy; in-situ composite; high strength; high electrical conductivity; microstructure
