Homogenization treatment and microstructure of semicontinous casting ingot of 2D70 heat-resistance aluminum alloy

被引：0
作者：
Li, Pei-Yue [1 ]
Xiong, Bai-Qing [1 ]
Zhang, Yong-An [1 ]
Li, Zhi-Hui [1 ]
Wang, Guo-Jun [1 ,2 ]
Wang, Feng [1 ]
Zhu, Bao-Hong [1 ]
机构：
[1] State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China
[2] Northeast Light Alloy Co., Ltd., Harbin 150060, China
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2010年 / 20卷 / 11期
关键词：
2d70 aluminum alloys - Dendritic microstructure - Energy dispersive X ray spectroscopy - Homogenization treatment - Non-equilibrium eutectic - Overheating temperatures - Semi-continuous casting - X-ray diffraction analyses (XRD);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The constituents of the semicontinuous casting ingot of 2D70 heat-resistance aluminum alloy and homogenization treatment were studied by optical microscopy (OM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), differential scanning calorimetry(DSC) and X-ray diffraction analysis (XRD). The results indicate that the semicontinuous casting ingot of 2D70 aluminum alloy presents a dendritic microstructure with severe segregation. The phases of the nonequilibrium eutectic are α(Al)+ θ(Al2Cu) + S(Al2CuMg) whose overheating temperature is 505.4°C. The volume fraction of hard dissolve phases such as Al7Cu2Fe, Al7Cu4Ni and Al9FeNi changes a little below 530°C. The reasonable homogenization treatment process of the alloy is (490°C, 16 h) +(520°C, 16 h).
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页码：2101 / 2105
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