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采用室温拉伸性能测试、示差扫描量热分析、金相分析以及透射电镜分析,研究了2124铝合金热轧厚板在不同固溶温度与固溶时间处理下的拉伸力学性能、显微组织及其变化规律。结果表明:适当升高固溶温度或延长固溶时间,晶粒中未溶第二相较少,可提高合金的固溶程度,从而提高合金的强度,但过高固溶温度或过长固溶时间会使晶粒有长大的倾向,使合金的伸长率降低。根据试验结果确定了该合金的最佳固溶温度为498℃,固溶时间为80 min。
Tensile mechanical properties of 2124 aluminum alloy hot-rolled thick plate under different solid solution temperature and solution treatment time were investigated by tensile testing at room temperature, differential scanning calorimetry, metallographic analysis and transmission electron microscopy. The microstructure And its variation. The results show that increasing the solid solution temperature or prolonging the solid solution time can decrease the undissolved second phase in the grains and increase the solid solution degree of the alloy, thus increasing the strength of the alloy. However, the solution temperature is too high The dissolution time will tend to grow grains, reducing the elongation of the alloy. According to the test results, the optimum solution temperature of this alloy is 498 ℃ and the solution time is 80 min.