Cu-Fe复合材料具有低廉的成本、良好的变形能力和优异的强化效果，从而得到国内外研究者广泛的关注，但Fe在Cu基体中有很高的固溶度，且在低温下很难析出。研究了1000℃均匀化热处理对Cu-20％(质量分数)Fe复合材料微观组织、力学和导电性能的影响规律。均匀化热处理使发达 Fe 枝晶发生断裂和球化，这使得在随后的形变过程中Fe纤维的尺寸减小，纤维间距细化14％~24％。经均匀化热处理的试样的强度和导电率都比未经处理的试样高4％~10％，这主要是由于均匀后热处理使得Fe枝晶球化并促进了Fe的析出。
Abstact:Cu-Fe composite was paid attention because of the low price,good deformability and strengthening. However,Fe has high solubility in Cu matrix and it is hard to precipitate at low temperature.Effects of homog-enization treatment on microstructure,and mechanical properties Cu-20wt%Fe composites were investigated in this paper.Homogenization treatment induced well-developed Fe dendrites to break and spheroidize.This re-fined the size and decreased the spacing of Fe fiber by 14%-24% during the cold drawing.Both ultimate tensile strength and electrical conductivity of Cu-20%Fe composite with homogenization treatment were increased by 4%-10%.It was resulted from the spheroidized Fe dendrite and the precipitation of Fe from Cu matrix.
参考文献
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