| 7075合金液相线半连续铸造与二次加热的合金组织 |
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| 引用本文： | 路贵民,董杰,崔建忠.7075合金液相线半连续铸造与二次加热的合金组织[J].中国有色金属学报,2001,11(2):211-215. |
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| 作者姓名： | 路贵民 董杰 崔建忠 |
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| 作者单位： | 东北大学 材料与冶金学院, |
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| 基金项目： | 国家自然科学基金资助项目(599740 09) |
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| 摘 要： | 提出了液相线半连续铸造制备铝合金半固态浆的新工艺，研究了液相线半连续铸造7075合金的微观组织及其在二次加热过程中的变化，在液相线温度下（908K）半连续铸造的7075合金组织为均匀、细小的蔷薇状组织，晶粒平均等积圆直径为29.7um，晶粒平均圆度为1.87。经二次加热后，铸造组织逐渐转变为等轴晶，在849K下加热60min后，晶粒平衡等积圆直径为57.6um，平均圆度为1.49,在869K下加热30min后，晶粒平均等积圆直径为47.2um，平均圆度为1.54。结果表明，液相线半边疆铸造可以获得理想的7075合金半固态浆料。
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| 关 键 词： | 液相线铸造 半连续铸造 铝合金 二次加热 组织 |
| 文章编号： | 1004-0609(2001)02-0211-05 |
| 修稿时间： | 2000年4月10日 |
Casting and remelted microstructures of 7075 alloy cast by
liquidus semi-continuous casting |
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| LU Gui-min,DONG Jie,CUI Jian-zhong.Casting and remelted microstructures of 7075 alloy cast by
liquidus semi-continuous casting[J].The Chinese Journal of Nonferrous Metals,2001,11(2):211-215. |
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| Authors: | LU Gui-min DONG Jie CUI Jian-zhong |
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| Abstract: | A new process， liquidus semi-continuous casting(LSC) to produce semi-solid slurries of aluminum alloy, was presented. The casting and remelted microstructures of 7075 alloy cast by LSC were studied. The microstructures cast at liquidus temperature(908K) by LSC is uniform， fine and rose flowered. The average equal-area-circle grain diameter is 29.7μm and the average roundness is 1.87. The casting microstructures are gradually turned into equiaxed grains by being remelted. After the casting billet are soaked at 849K for 60min， the average equal-area-circle grain diameter is 57.6μm and the average roundness is 1.49. After the casting billet is soaked at 869K for 30min， the average equal-area-circle grain diameter is 47.2μm and the avege roundness is 1.54. The results show that fine semi-solid slurries of 7075 alloy can be obtained by LSC. |
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| Keywords: | liquidus casting semi-continuous casting semi-solid Al alloy non-dendrite |
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