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研究了Cu-12.8%Fe复合材料形变热处理时退火温度和形变量对复合材料微观组织、导电率及抗拉强度的影响。结果表明,退火温度的升高,Fe纤维逐渐出现弯曲、断开等再结晶现象,退火处理后进一步拉拔可以增加纤维的连续性,恢复纤维的拉拔特征,且Fe纤维较退火处理后纤维细小;随形变量的增加,复合材料的抗拉强度逐渐增加,导电率逐渐降低,450℃×1 h退火处理后复合材料的加工硬化率增加最为显著,且450℃退火处理后形变至减面率为81.6%时,抗拉强度与导电率分别增加了10%和5%。对比研究表明450℃是较好的退火处理温度,获得的较优综合匹配性能分别为615 MPa/59.5%IACS(450℃×1 h,η=8.19)、1008 MPa/53.3%IACS(450℃×1 h,η=9.93),并分析了其原因。
The effects of annealing temperature and amount of deformation on the microstructure, electrical conductivity and tensile strength of Cu-12.8% Fe composites were investigated. The results show that the recrystallization of the Fe fibers gradually occurs after the annealing, such as bending and breaking. The further drawing after the annealing treatment can increase the continuity of the fibers and recover the drawing characteristics of the fibers, and the Fe fibers are slightly harder than the annealed fibers The tensile strength of the composites increases gradually and the electrical conductivity decreases gradually with the increase of the deformation variables.The work hardening rate of the composites increases most significantly after annealed at 450 ℃ for 1 h, At a rate of 81.6%, tensile strength and electrical conductivity increased by 10% and 5%, respectively. The comparative study shows that the optimum annealing temperature is 450 ℃, and the optimal comprehensive matching performance is 615 MPa / 59.5% IACS (450 ℃ × 1 h, η = 8.19), 1008 MPa / 53.3% IACS 1 h, η = 9.93), and analyzed the reason.