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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。
The effects of aging temperature and time on the properties of Cu-1.5Ni-0.6Si alloy were studied. The rate of change of the new phase during the aging process was calculated from the relationship between the electrical conductivity and the amount of the new phase transformation through the change of electrical conductivity in the solution of Cu-1.5Ni-0.6Si alloy at 450 ℃. According to the empirical formula of Avrami, the phase change kinetic equation and conductivity equation of aging at this temperature are determined. The experimental results show that aging precipitates as the main strengthening method of Cu-1.5Ni-0.6Si alloy. After aging at different temperatures, the hardness and electrical conductivity of Cu-1.5Ni-0.6Si alloy increase rapidly at the initial stage of aging, and then slowly decrease after reaching the peak hardness, while the conductivity continues to rise. The calculated value obtained from the conductivity equation can be in good agreement with the experimental data, which provides a reference for the formulation of the alloy production process.