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对工业纯铝在室温和0.4%～8%小变形度范围内,退火温度与再结晶后晶粒的关系进行了研究.试验结果表明,在相同小变形度条件下,随着退火温度升高,再结晶后晶粒尺寸倾向于减小,并且随退火温度升高,临界变形度减小.观察变形度为3%,遇火温度为560℃和600℃的再结晶过程,并测定其平均形核率(N)和长大速度(G)的结果显示,N/G值随着退火温度升高而增加.按d=C〔G/N〕~(1/4)公式可理解为在小变形度范围内,随着退火温度升高,因〔N/G〕值的增加而导致再结晶后晶粒尺寸的减小.通过激活能计算表明,工业纯铝在小变形的范围内,再结晶形核率的激活能大于长大速度的激活能.
The relationship between the annealing temperature and the recrystallized grains in the range of 0.4% ~ 8% deformation of commercial pure aluminum was studied.The experimental results show that with the same small deformation, with the increase of annealing temperature , The grain size tends to decrease after recrystallization, and the critical deformation decreases with the increase of annealing temperature.The recrystallization process with the deformation degree of 3%, the temperature of 560 ℃ and 600 ℃ is observed, and the average The results of the nucleation rate (N) and growth rate (G) show that the N / G value increases with the increase of the annealing temperature. According to the formula d = C [G / N] Within the range of small deformation, as the annealing temperature increases, the grain size decreases after recrystallization due to the increase of [N / G] value.According to the calculation of activation energy, it is shown that in the range of small deformation, The activation energy of recrystallization nucleation rate is greater than the activation energy of growth rate.