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采用类端淬设备、电导率计、差示热扫描分析仪和透射电镜等并结合数字模拟研究了211Z型铝合金的淬透性能。结果表明:试样在≤40℃水温淬火的过饱和固溶程度、时效后的硬度均高于水温较高(50~60℃)时淬火的相应值,但淬透深度相反;试样时效处理后的硬度值受淬火敏感温度区间(140~380℃)的平均冷却速度影响,超过临界值后,硬度值基本保持不变,小于临界值,则随平均冷却速度的增加而增大。
The hardenability of 211Z aluminum alloy was studied by means of quasi-quenching equipment, conductivity meter, differential thermal scanning analyzer and transmission electron microscope combined with numerical simulation. The results show that the hardness of supersaturated solid solution after quenching at 40 ℃ is higher than that of quenching at higher water temperature (50-60 ℃), but the depth of penetration is opposite. The hardness value is affected by the average cooling rate in the quenching sensitive temperature range (140 ~ 380 ℃). After exceeding the critical value, the hardness value remains unchanged. When the value is less than the critical value, the hardness increases with the average cooling rate.