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通过真空感应熔炼制备了过饱和的CuCrZr合金,对该合金进行固溶处理后,在不同温度下进行时效处理。采用光镜和扫描电镜观察合金组织,检测该合金的强度及硬度,测量合金电导率。研究结果表明:CuCrZr合金的最佳热处理工艺是1 050℃固溶并保温1.5 h水淬后,再505℃时效并保温4 h。此状态下合金的硬度为196 HB,电导率为53MS/m。CuCrZr合金的强度主要通过时效析出来获得,且析出的粒子与位错、晶界的交互作用在提高合金强度的同时抑制合金的再结晶过程,使合金获得良好的性能。
The supersaturated CuCrZr alloy was prepared by vacuum induction melting. The alloy was solution treated and then aged at different temperatures. The microstructure of the alloy was observed under a light microscope and a scanning electron microscope. The strength and hardness of the alloy were measured and the conductivity of the alloy was measured. The results show that the optimal heat treatment process of CuCrZr alloy is solid solution at 1 050 ℃, water quenching after 1.5 h incubation, aging at 505 ℃ for 4 h. The hardness of this alloy is 196 HB and its conductivity is 53 MS / m. The strength of CuCrZr alloy is mainly obtained by aging precipitation, and the interaction between precipitated particles and dislocation and grain boundary can restrain the recrystallization of the alloy while improving the strength of the alloy, so that the alloy has good performance.