超声铸造2219铝合金均匀化工艺及第二相演变
发布时间：2018-09-17 07:19
【摘要】：采用DSC、金相、扫描电镜及能谱分析等方法,研究超声铸造2219铝合金均匀化工艺及合金铸锭中的第二相在不同均匀化制度处理过程中的演变规律。研究结果表明:超声铸造2219铝合金铸锭中存在大量非平衡凝固共晶体,其中的低熔点非平衡共晶相为Al_2Cu相,其过烧温度为560.79℃;在均匀化热处理过程中,该非平衡凝固共晶体不断向合金基体溶解,其数量、形态和分布均发生很大变化;铸锭中还存在少量长条状含铁相,该相在某些均匀化制度处理下变得粗大;该合金较合理的均匀化制度为550℃,24 h。
[Abstract]:By means of DSC, metallography, SEM and EDS, the homogenization process of 2219 aluminum alloy in ultrasonic casting and the evolution of the second phase in the alloy ingot in different homogenization systems were studied. The results show that there are a large number of non-equilibrium eutectic in ultrasonic casting 2219 aluminum alloy ingot, in which the low melting point non-equilibrium eutectic phase is Al_2Cu phase and its overburning temperature is 560.79 鈩，
本文编号：2245137
[Abstract]:By means of DSC, metallography, SEM and EDS, the homogenization process of 2219 aluminum alloy in ultrasonic casting and the evolution of the second phase in the alloy ingot in different homogenization systems were studied. The results show that there are a large number of non-equilibrium eutectic in ultrasonic casting 2219 aluminum alloy ingot, in which the low melting point non-equilibrium eutectic phase is Al_2Cu phase and its overburning temperature is 560.79 鈩，
本文编号：2245137
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