Institutional Repository of Coll Mat Sci & Engn
Microstructure analysis of ZA alloy rod directionally solidified by heated mold continuous casting | |
Ma, Ying; Hao, Yuan; Yan, Feng-Yun; Liu, Hong-Jun | |
2004 | |
会议名称 | 2004 TMS Annual Meeting |
会议录名称 | TMS Annual Meeting |
页码 | 261-268 |
会议日期 | March 14, 2004 - March 18, 2004 |
会议地点 | Charlotte, NC, United states |
出版者 | Minerals, Metals and Materials Society |
摘要 | The as-cast and heat treatment microstructure of ZA alloy rod directionally solidified by continuous casting has been analyzed. The results show that the microstructure of the ZA alloy line is the parallel directional dendritic columnar crystal. Each dendritic crystal of eutectic alloy ZA5 is composed of many layer eutectic β and η phases. The microstructure of hyper eutectic ZA alloys is primary dendritic crystal and interdendritic eutectic structure. The primary phase of ZA8 and ZA12 is β phase, while the primary phase of ZA22 and ZA27 is α phase. The technique of heated mold continuous casting, that is OCC, was invented by Ohno A[1-3]. The main difference between this method and traditional continuous casting is that it have changed the cooling mold of traditional continuous casting into the heated mold, to avoid the surface solidification of molten metal on the inner mold. During the solidification of heated mold continuous technique, heat of molten metal transfers alone the one dimension of solidified solid phase to form the directional solidified condition. The solidified structure of casting is determined by the heat and quantity transfer and the composition of alloy together. Having entered into the stable growth stage of crystal, only the crystal with a parallel direction to heat flow can growth well. Therefore, the rod made by heated mold continuous casting is the directional continuous columnar structure. Alloy composition determines the solidification structure and the forming tendency of phase structure. The alloy with a different composition has a different solidification character. The microstructure of alloys with a columnar structure but different composition has an obvious difference. Hence, authors have observed and analyzed the structure of heated mold continuous casting ZA alloy rod in order to find an effect method to increase the properties of ZA alloy. |
关键词 | Aluminum alloys Continuous casting Heat treatment Microstructure Molds Phase transitions Solidification Surface chemistry Columnar steel Heated mold Lanzhou University of Technology Zinc-aluminium alloy |
收录类别 | EI |
语种 | 英语 |
EI入藏号 | 2005339299395 |
EI主题词 | Zinc alloys |
来源库 | Compendex |
分类代码 | 801.4 Physical Chemistry - 546.3 Zinc and Alloys - 541.2 Aluminum Alloys - 802.3 Chemical Operations - 537.1 Heat Treatment Processes - 534.2 Foundry Practice - 531.2 Metallography - 535.2.1 Metal Forming Machines |
文献类型 | 会议论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/117129 |
专题 | 材料科学与工程学院 国际教育学院 |
作者单位 | State Key Laboratory of Advanced Non-Ferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China |
第一作者单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Ma, Ying,Hao, Yuan,Yan, Feng-Yun,et al. Microstructure analysis of ZA alloy rod directionally solidified by heated mold continuous casting[C]:Minerals, Metals and Materials Society,2004:261-268. |
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