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采用真空熔炼、轧制和固溶处理,然后冷加工75%制备Au Ag Cu35-5合金片材。研究合金固溶和时效处理对组织和力学性能的影响。结果表明:500℃固溶处理时,合金组织为纤维状回复再结晶结构。随固溶温度增加,组织发生完全再结晶并长大,形成贯穿晶粒的完整退火孪晶。炉冷和时效处理时,组织为等轴细小的球形晶粒。合金的硬度随固溶温度升高而降低,时效硬度随温度升高而增大。300℃时效时,硬度在3 h时效时达到峰值,然后随时间增加,缓慢降低。
Au Ag Cu35-5 alloy sheets were prepared by cold melting, rolling and solution treatment followed by 75% cold working. The effects of solution treatment and aging treatment on the microstructure and mechanical properties were investigated. The results show that the microstructure of the alloy is fibrous recrystallized structure at 500 ℃. With the increase of solution temperature, the structure completely recrystallizes and grows to form a complete annealing twins that penetrate the grains. Furnace cooling and aging treatment, the organization of fine equiaxed spherical grains. The hardness of the alloy decreases with the increase of solution temperature, and the hardness of aging increases with the increase of temperature. 300 ℃ aging, the hardness peaked at 3 h aging, and then increased with time, slowly decreased.