固溶态Cu-1.5Ni-0.6Si合金时效析出动力学研究
Study on Dynamics of Cu-1.5Ni-0.6Si Alloy As-solutioned During Aging Precipitation
肖翔鹏1, 黄国杰1, 程 磊1, 梁琦明2
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作者单位：(1. 北京有色金属研究总院 有色金属材料制备加工国家重点实验室, 北京 100088; 2. 中色奥博特铜铝业有限公司，山东 临清 252600)
中文关键字：Cu-1.5Ni-0.6Si合金； 时效； 电导率； 相变动力学； 相变方程
英文关键字：Cu-1.5Ni-0.6Si alloy; aging; electrical conductivity; transformation kinetics; equations of phase change
中文摘要：研究了时效温度和时间对Cu-1.5Ni-0.6Si合金性能的影响。通过对固溶态Cu-1.5Ni-0.6Si合金450 ℃时效过程中的电导率的变化，根据电导率与新相的转变量之间的关系计算时效过程中新相的变化率。根据Avrami经验公式确定该温度下时效的相变动力学方程及电导率方程。实验结果表明，时效析出为Cu-1.5Ni-0.6Si合金的主要强化手段。Cu-1.5Ni-0.6Si固溶后经不同温度时效后，时效初期硬度和电导率快速上升，随后硬度到达峰值后缓慢下降，而电导率继续上升。由该电导率方程所得的计算值能较好地与实验值相符，为该合金的生产工艺的制定提供参考依据。
英文摘要：The effects of aging temperature and aging time on properties of Cu-1.5Ni-0.6Si alloy were studied. The transformation ratio of new phase in Cu-1.5Ni-0.6Si alloy was calculated when aging at 450 ℃ by measuring the electrical conductivity and the relation between the electrical conductivity and the quantity of new phase. The equation of the phase transformation kinetics and electrical conductivity equation was determined according to Avrami empirical formula. The results show that aging precipitation is the main strengthening methods for the Cu-1.5Ni-0.6Si alloy. The initial hardness and electrical conductivity increases rapidly after different solution-aging processes. Hardness declines slowly then reachs the peak, while the electrical conductivity continues to rise. The calculated values of electrical conductivity well consistent with those of experiment, which can provide reference on the alloy of production process.