稀土钇细化半固态铝合金初生α相的机制研究

doi:10.11890/1006-7191-104-277

Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (4): 277-284.DOI: 10.11890/1006-7191-104-277

稀土钇细化半固态铝合金初生α相的机制研究

刘政,刘小梅,胡咏梅

江西理工大学

收稿日期:2009-12-29 修回日期:2010-05-11 出版日期:2010-08-25 发布日期:2010-08-11
通讯作者: 刘政

Refining mechanism of yttrium on primary α-Al semi-solid Al alloy

Zheng LIU^1,2, Yongmei HU^2,3,Xiaomei LIU¹

1. Faculty of Mechanical and Electronic Engineering, Jiangxi University of Science and Technology,Ganzhou 341000, China
2. Jiangxi Nonferrous Metal Processing Engineering Research Center, Ganzhou 341000, China
3. Engineering Institute, Jiangxi University of Science and Technology, Ganzhou 341000, China

Received:2009-12-29 Revised:2010-05-11 Online:2010-08-25 Published:2010-08-11
Contact: ZhengLIU

摘要/Abstract

摘要：

利用稀土Y对液态Al7Si0.3Mg合金进行了细化处理，并用低温浇注技术制备了半固态Al7Si0.3Mg合金浆料。研究了稀土钇细化晶粒对所制备Al7Si0.3Mg合金的半固态初生α-Al形貌和尺寸的影响。研究结果表明，稀土钇细化处理的Al7Si0.3Mg合金经低温浇注可制备具有颗粒状和蔷薇状初生α-Al的半固态浆料，稀土Y可显著改善Al7Si0.3Mg合金中初生α-Al的晶粒尺寸和颗粒形貌。探讨了稀土Y对半固态Al7Si0.3Mg合金中初生α-Al的形貌和晶粒尺寸的细化机制。

关键词: 半固态, 钇, Al7Si0.3Mg合金, 细化机制

Abstract:

Semi-solid Al7Si0.3Mg alloy slurry, which is grain-refined by yttrium, is manufactured by low temperature pouring. The effects of grain-refined by yttrium on the morphology and the grain size of the primary α-Al in semi-solid Al7Si0.3Mg alloy are researched. The results indicate that semi-solid Al7Si0.3Mg alloy with particle-like and rosette-like primary α-Al can be prepared by low temperature pouring from liquid Al7Si0.3Mg alloy grain-refined by yttrium. The grain size and particle morphology of primary α-Al in Al7Si0.3Mg alloy are markedly improved by 0.5 wt pct Y. The refining mechanism of Y on the morphology and the grain size of the primary $\alpha$-Al in semi-solid Al7Si0.3Mg alloy are delved.

Key words: Semi-solid, Yttrium, Al7Si0.3Mg alloy, Refining mechanism

刘政刘小梅胡咏梅. 稀土钇细化半固态铝合金初生α相的机制研究[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(4): 277-284.

Zheng LIU, Yongmei HU,Xiaomei LIU. Refining mechanism of yttrium on primary α-Al semi-solid Al alloy[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(4): 277-284.

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稀土钇细化半固态铝合金初生α相的机制研究

Refining mechanism of yttrium on primary α-Al semi-solid Al alloy

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