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研究2026铝合金在温度为300-450°C和应变速率为0.01-10s-1的变形条件与固溶时效热处理后微观组织之间的关系。结果表明:热处理后的再结晶和析出特性与热变形时的温度补偿应变速率Z有关。在低Z条件下,热处理后会形成少量细小的再结晶晶粒,热变形过程产生的高角度亚晶粒和粗大析出物被保留下来;高Z条件下,热处理后会产生大量细小等轴晶再结晶晶粒,热变形过程产生的高密度晶胞和相对细小的动态析出物被热处理后完整的亚晶粒和相对粗化的析出物所替代。热处理后的平均再结晶晶粒尺寸随着Z值的增加而减小。建立两者的定量关系式。
The relationship between the deformation conditions of 2026 aluminum alloy at temperature of 300-450 ° C and the strain rate of 0.01-10s-1 and the microstructure after solution aging treatment was studied. The results show that the recrystallization and precipitation behavior after heat treatment is related to the temperature-compensated strain rate Z during thermal deformation. At low Z, a small amount of fine recrystallized grains are formed after heat treatment, and the high-angle subgrains and coarse precipitates generated during thermal deformation are retained. Under high-Z conditions, a large number of fine equiaxed grains Recrystallized grains, hot deforming process produces high-density unit cells and relatively small dynamic precipitates after heat treatment complete subgrains and relatively coarse precipitates replaced. The average recrystallization grain size after heat treatment decreases with the increase of Z value. Establish a quantitative relationship between the two.