| 高功率超声外场下7050合金中的显微疏松 |
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| 引用本文： | 张明,李晓谦,黎正华,许显华.高功率超声外场下7050合金中的显微疏松[J].铸造,2011,60(2). |
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| 作者姓名： | 张明 李晓谦 黎正华 许显华 |
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| 作者单位： | 中南大学机电工程学院,现代复杂装备设计与极端制造教育部重点实验室,湖南长沙,410083 |
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| 基金项目： | 航空航天用高性能轻合金大型复杂结构件制造的基础研究 |
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| 摘 要： | 通过对超声波发生器的优化,研究了高功率超声波对7050铝合金铸锭中显微疏松形成的影响.试验结果表明,高功率超声处理的铸锭的组织更加致密,声流效应更加显著.在试验所用超声功率范围内,超声功率为2600W时除气效率最高,抑制显微疏松形成的效果最佳,铸锭中横截面处显微疏松百分比减少了30.4%-56.3%,中心显微疏松的百分比也减小了31.1%-53.3%,这表明高功率超声振动能极大降低显微疏松的形成.
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| 关 键 词： | 铸造7050合金 显微疏松 高功率超声 声流 除气 补缩 |
Micro-Porosity in 7050 Alloy Ingot Under High Power Ultrasonic Field |
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| ZHANG Ming,LI Xiao-qian,LI Zheng-hua,XU Xian-hua.Micro-Porosity in 7050 Alloy Ingot Under High Power Ultrasonic Field[J].Foundry,2011,60(2). |
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| Authors: | ZHANG Ming LI Xiao-qian LI Zheng-hua XU Xian-hua |
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| Affiliation: | ZHANG Ming,LI Xiao-qian,LI Zheng-hua,XU Xian-hua(Key Laboratory of Modern Complex Equipment Design and Extreme Manufacturing,Ministry of Education,School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,Hunan,China) |
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| Abstract: | The ultrasonic generator was used to treat the 7050 aluminum alloy melt so as to study the effect of ultrasonic on micro-porosity of 7075 aluminum alloy ingot.The experimental results show that the high power ultrasound apparently increased the structure compactness of the ingot.In addition,the large-scale acoustic streaming effect was more significant.The highest degassing ability and the optimal micro-porosity restraining result were obtained when the vibrating power is 2 600 W.The cross-sectional micro-p... |
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| Keywords: | casting 7050 alloy micro-porosity high power ultrasonic acoustic streaming degassing feeding |
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