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).

引用

页码：2101 / 2105