| 电磁场频率对电磁铸造7075铝合金微观组织的影响 |
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| 引用本文： | 张北江,崔建忠,路贵民,张勤,班春燕.电磁场频率对电磁铸造7075铝合金微观组织的影响[J].金属学报,2002,38(2):215-218. |
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| 作者姓名： | 张北江 崔建忠 路贵民 张勤 班春燕 |
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| 作者单位： | 东北大学材料电磁过程研究教育部重点实验室,沈阳,1100004 |
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| 基金项目： | 国家重点基础研究发展规划“973” G199906490501资助项目 |
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| 摘 要： | 观察了电磁场频率对电磁铸造705铝合金圆锭（直径为200mm)微观组织的影响；在10－100Hz范围内采用不同的电磁场频率通过电磁铸造工艺制得7075铝合金铸锭，分析其微观组织及合金元素分布情况，结果表明，电磁场频率的发言为可显著影响熔体的凝固组织，频率为30Hz时可最有效地抑制宏观偏析，改善铸锭的表面质量，15Hz时能够更有效地细化晶粒。
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| 关 键 词： | 电磁铸造 电磁场频率 微观组织 偏析 铝合金 |
| 文章编号： | 0412-1961(2002)02-0215-04 |
| 修稿时间： | 2001年4月25日 |
EFFECT OF FREQUENCY ON MICROSTRUCTURE OF ELECTROMAGNETIC CASTING 7075 ALUMINUM ALLOY |
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| ZHANG Beijang,CUI Jianzhong,LU Guimin,ZHANG Qin,BAN Chunyan.EFFECT OF FREQUENCY ON MICROSTRUCTURE OF ELECTROMAGNETIC CASTING 7075 ALUMINUM ALLOY[J].Acta Metallurgica Sinica,2002,38(2):215-218. |
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| Authors: | ZHANG Beijang CUI Jianzhong LU Guimin ZHANG Qin BAN Chunyan |
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| Abstract: | The relationship between electromagnetic frequency and microstructure of continuous casting aluminum alloys was observed. 7075 aluminum alloy ingots with 200 mm in diameter were pro- duced uner the frequency range of 10-100 Hz, and the microstructures of as-cast ingot was examined by scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS). The results show that electromagnetic frequency greatly influences segregation alloying elements and microstruc- tures of as-cast ingot, and product quality can be improved by application of a proper frequency (30 Hz). Electromagnetic frequency plays a significant role in solute redistribution; and lower frequency is more efficient for promoting solution of alloying elements and refining microstructure (15 Hz). |
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| Keywords: | electromagnetic casting electromagnetic frequency microstructure segregation aluminum alloy |
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