【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1119MPa,导电率(vsIACS)达到76%。更多还原

【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).更多还原