| 厚条带Mg-Al-Zn基合金的显微组织研究 |
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| 引用本文： | 赵红亮,郑飞燕,关绍康,周占霞,石广新.厚条带Mg-Al-Zn基合金的显微组织研究[J].材料科学与工程学报,2005,23(4):607-609. |
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| 作者姓名： | 赵红亮 郑飞燕 关绍康 周占霞 石广新 |
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| 作者单位： | 郑州大学材料工程学院,河南郑州,450002 |
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| 基金项目： | 河南省自然科学基金
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教育部重点项目 |
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| 摘 要： | 利用单辊低速旋铸方法制备出Mg-3%Al-i.2%Zn-0.2%Mn合金厚条带,估算了不同转速下条带的冷却速度,并重点研究了条带正面及其横截面的显微组织.结果表明:单辊低速旋铸条带(300转/分和500转/分)的冷却速度在104K/s和105K/s之间,厚条带的晶粒较铸态组织品粒细小.500转/分的镁合金条带的断面组织晶粒沿横截面分布比较均匀,并基本均为等轴晶区.300转/分条带的自由面出现部分柱状晶,而贴辊面及贴辊面和自由面之间的过度区都为等轴晶.
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| 关 键 词： | 厚条带 快速凝固 镁合金 显微组织 合金 组织研究 Melt Spinning Ribbons Alloy Based 等轴晶区 辊面 柱状晶 自由面 均匀 比较 面分布 横截面 断面 金条 织品 铸态 晶粒 结果 |
| 文章编号： | 1004-793X(2005)04-0607-03 |
| 修稿时间： | 2004年9月20日 |
Microstructure of Mg-Al-Zn Based Alloy Thick Ribbons Prepared by Melt Spinning |
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| ZHAO Hong-liang,ZHENG Fei-yan,GUAN Shao-kang,ZHOU Zhan-xia,SHI Guang-xin.Microstructure of Mg-Al-Zn Based Alloy Thick Ribbons Prepared by Melt Spinning[J].Journal of Materials Science and Engineering,2005,23(4):607-609. |
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| Authors: | ZHAO Hong-liang ZHENG Fei-yan GUAN Shao-kang ZHOU Zhan-xia SHI Guang-xin |
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| Abstract: | In this paper, the technology of rapidly solidified (RS) ribbons in Mg-3%Al-1%Zn-0.2%Mn alloy has been investigated using melt spinning technique with low speed. Cooling rate of the as-spun ribbons prepared at different wheel speed is estimated. Microstructures of as-spun ribbons are studied. The result indicates that the cooling rate of the as-spun ribbons with low speed is from 10~4 K/s to 10~5K/s. The grains of as-spun ribbons are smaller than the as-cast ingots'. The microstructure of the as-spun ribbon at 500 rpm along the cross section is uniform. While in the as-spun ribbon at 300 rpm, equiax crystals are found near the roller surface side, and near the unconfined flow surface, column crystals appear. |
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| Keywords: | thick ribbons rapid solidification magnesium alloy microstructure |
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