固溶处理对7B04铝合金组织及性能的影响
发布时间：2019-01-16 02:47
【摘要】：利用金相组织观察(OM)、扫描电镜分析(SEM)、透射电镜观察(TEM)以及硬度测试,研究固溶处理对7B04铝合金显微组织及硬度的影响。结果表明:实验合金中的η相(Mg Zn_2)为易溶相,S相(Al_2Cu Mg)为难溶相,含Fe杂质相为不溶相;进行单级固溶处理时,随着固溶温度的升高,实验合金的固溶程度、再结晶程度和再结晶晶粒尺寸增加,当温度超过480℃时,出现过烧现象,力学性能恶化,7B04铝合金淬火敏感性较高;双级固溶可有效抑制合金再结晶、降低合金淬火敏感性,实验条件下较好的双级固溶工艺为(450℃,0.5 h)+(490℃,0.5 h),抑制合金再结晶效果最佳,经120℃时效24 h后,硬度达到最大值,为204HV1。
[Abstract]:(OM), scanning electron microscope (SEM) was used to observe the microstructure and hardness of 7B04 aluminum alloy. The effect of solution treatment on the microstructure and hardness of 7B04 aluminum alloy was studied by means of (SEM), transmission electron microscope (TEM) and hardness test. The results show that 畏 phase (Mg Zn_2) is soluble phase, S phase (Al_2Cu Mg) is difficult to dissolve and Fe impurity phase is insoluble phase. With the increase of solution temperature, the degree of solid solution, the degree of recrystallization and the grain size of recrystallization increase. When the temperature exceeds 480 鈩，
本文编号：2409383
[Abstract]:(OM), scanning electron microscope (SEM) was used to observe the microstructure and hardness of 7B04 aluminum alloy. The effect of solution treatment on the microstructure and hardness of 7B04 aluminum alloy was studied by means of (SEM), transmission electron microscope (TEM) and hardness test. The results show that 畏 phase (Mg Zn_2) is soluble phase, S phase (Al_2Cu Mg) is difficult to dissolve and Fe impurity phase is insoluble phase. With the increase of solution temperature, the degree of solid solution, the degree of recrystallization and the grain size of recrystallization increase. When the temperature exceeds 480 鈩，
本文编号：2409383
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