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中文摘要：
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。
英文摘要：
Cu-15Cr-0.1Zr in situ composite was fabricated by cold drawing and intermediate heat treatment.Results of experiments demonstrate ultimate tensile strength of the in situ Cr fiber reinforced composite reaches 1200 MPa,electric conductivity reaches 73% IACS.The evolution of microstructure and mechanical properties of the material with different drawing ratio were investigated.With increasing drawings ratio,the dendrite chromium phase with a discontinuous distribution develops into fine fibrous bundles to result in the increase of strength.The influence of different intermediate heat treatment on properties was studied,and the results suggest that Cu-15Cr0.1Zr in situ composite which exhibits a good combination of strength and conductivity can be obtained by controlling draw ratio and proper intermediate heat treatment.
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