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采用冷变形+中间热处理方法制备Cu-15Cr-0.1Zr原位复合材料。这种Cr纤维原位强化复合材料的强度为1200MPa,导电率为73%IACS。研究了不同应变量下材料的微观组织演变和力学性能。随应变量的增加,强度增加,Cr相形态由枝晶演变为细小丝带状。研究不同中间退火工艺对材料性能的影响,结果表明,通过冷变形及适当的中间热处理可获得强度和导电率的较好组合。
Cu-15Cr-0.1Zr in-situ composites were prepared by cold deformation and intermediate heat treatment. The strength of this Cr-fiber in-situ reinforced composite was 1200 MPa with a conductivity of 73% IACS. The microstructural evolution and mechanical properties of the materials under different amounts of strain were studied. With the increase of strain, the strength increases, and the morphology of Cr phase evolves from dendrites to tiny ribbons. The effects of different intermediate annealing processes on the properties of the materials were investigated. The results show that a good combination of strength and electrical conductivity can be obtained by cold deformation and appropriate intermediate heat treatment.