【摘要】 为阐明Cu-Cr-Zr合金时效过程中的组织性演化规律,本文对经过连续铸造、固溶和冷拉拔的Cu-1.5Cr-0.2Zr合金进行时效处理,研究了时效温度和时效时间对该合金组织和性能的影响,并对该合金在不同温度下的时效行为进行了分析。结果表明:对Cu-Cr-Zr合金施以450℃/3 h时效可获得最佳的性能组合,其显微硬度和导电率分别为241 HV和72.5%IACS。时效时合金化元素的脱溶使合金基体的过饱和度降低,发生了合金化元素再分配过程。时效态Cu-Cr-Zr合金的断裂机制为微孔聚集型延性断裂。更多还原

【Abstract】 In order to illuminate the evolution law of microstructures and properties of Cu-Cr-Zr alloy during aging, effects of aging temperature and aging time on microstructures and properties of Cu-1.5Cr-0.2Zr alloys which are produced by continuous casting, solution-treated and cold drawing process are investigated in this paper, and the aging behavior of the alloy is analyzed.Results show that a better combination of properties is obtained for the Cu-Cr-Zr alloy aged at 450 ℃ for3 h, the micro-hardness and electrical conductivity of the alloy are 241 HV and 72.5% IACS. The alloying elements desolvation leads to the supersaturation reducing in the matrix and the alloying elements redistribution process occurs by aging treatment. The fracture mechanism of Cu-Cr-Zr alloy after aging is the microporous coalescence fracture.更多还原