| Partial Remelting of Thixotropic Magnesium-Rare Earth Alloy from Near Non- Equilibrium- Liquidus Casting |
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| 作者姓名： | 乐启炽 王忠军 崔建忠 徐宝勤 |
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| 作者单位： | Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University,Shenyang 110004, China |
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| 基金项目： | Liaoning Province Science and Technology Fundof China，国家科技攻关项目 |
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| 摘 要： | After the investigation on partial remelting of thixotropic magnesium serial alloys （ZK60） by near non-equilibrium liquidus casting （NNLC）, the primary solid grains of ZK60-2Ca alloy spheroidized notably during partial remelting processing, however, coarsening and polygonization as occurred holding time prolonged. The refining and globularity of the thixotropic alloys are promoted after further alloyed by Y, RE, Nd and/or Ag, and the results vary with those addition. The remelting structure of ZK60-2Ca-1Y alloy is finer than its base alloy. And the effect of RE, especially Ag, on the refinement of microstrueture is notable, but Nd does nothing on it. There is little impact of remelting temperature fluctuation on partial remelted microstrueture as holding time in general. On the contrary, it is more sensitive at longer holding time. The quality thixotropic silver-contained alloy can be achieved by remelted partially at 600℃ for 10 min.
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| 关 键 词： | 非平衡液相线铸造 镁合金 触变铸造 稀土 半固态加工 |
| 文章编号： | 1002-0721（2005）06-0737-05 |
| 收稿时间： | 2004-08-25 |
| 修稿时间： | 2004-12-10 |
Partial Remelting of Thixotropic Magnesium-Rare Earth Alloy from Near Non- Equilibrium- Liquidus Casting |
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| Le Qichi,Wang Zhongjun,Cui Jianzhong,Xu Baoqin.Partial Remelting of Thixotropic Magnesium-Rare Earth Alloy from Near Non- Equilibrium- Liquidus Casting[J].Journal of Rare Earths,2005,23(6):737-741. |
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| Authors: | Le Qichi Wang Zhongjun Cui Jianzhong Xu Baoqin |
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| Abstract: | After the investigation on partial remelting of thixotropic magnesium serial alloys (ZK60) by near non-equilibrium liquidus casting (NNLC), the primary solid grains of ZK60-2Ca alloy spheroidized notably during partial remelting processing, however, coarsening and polygonization as occurred holding time prolonged. The refining and globularity of the thixotropic alloys are promoted after further alloyed by Y, RE, Nd and/or Ag, and the results vary with those addition. The remelting structure of ZK60-2Ca-1Y alloy is finer than its base alloy. And the effect of RE, especially Ag, on the refinement of microstructure is notable, but Nd does nothing on it. There is little impact of remelting temperature fluctuation on partial remelted microstructure as holding time in general. On the contrary, it is more sensitive at longer holding time. The quality thixotropic silver-contained alloy can be achieved by remelted partially at 600 ℃ for 10 min. |
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| Keywords: | magnesium alloy semi-solid slurrying near non-equilibrium liquidus casting partial remelting |
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