| 脉冲电流对7075铝合金铸态组织的影响 |
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| 引用本文： | 梁 宇,孙中源,余凌峰,石芷依. 脉冲电流对7075铝合金铸态组织的影响[J]. 有色金属(冶炼部分), 2013, 0(8): 42-45 |
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| 作者姓名： | 梁 宇 孙中源 余凌峰 石芷依 |
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| 作者单位： | 1. 贵州大学材料与冶金学院,贵阳550003;贵州省材料结构与强度重点实验室,贵阳550003
2. 贵州大学材料与冶金学院,贵阳,550003 |
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| 基金项目： | 贵州省科技攻关计划项目（黔科合GY字[2010]3028）；贵州大学研究生创新基金项目（理工2012028） |
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| 摘 要： | 研究了脉冲电流及Al-5Ti-B变质剂对7075铝合金铸态组织的改善和机理。结果表明,通入电脉冲及添加变质剂能抑制二次枝晶的生长,改善铸造组织的形貌,基体主要是均匀的等轴晶和近球形晶粒,同时,与直接浇铸的试样对比,合金中铜和铁元素的偏析现象得到一定程度缓解。
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| 关 键 词： | 脉冲电流 变质剂 7075铝合金 Al-5Ti-B 铸态组织 |
| 收稿时间： | 2013-01-22 |
| 修稿时间： | 2013-01-24 |
Effects of Pulse Current on Cast Structure of 7075 Aluminum Alloy |
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| Liang Yu,Sun Zhongyuan,Yu Lingfeng and Shi Zhiyi. Effects of Pulse Current on Cast Structure of 7075 Aluminum Alloy[J]. Nonferrous Metals(Extractive Metallurgy), 2013, 0(8): 42-45 |
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| Authors: | Liang Yu Sun Zhongyuan Yu Lingfeng Shi Zhiyi |
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| Affiliation: | School of Materials and Metallurgy,Guizhou University,,, |
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| Abstract: | The modification and mechanisms of pulse current and Al-5Ti-B modificator on as-cast structure of 7075 aluminum alloy were studied. The results show that pulse current and Al-5Ti-B modificator can inhibit grow of secondary dendritic crystal of solidification structure, from growing, improve as-cast structure, and achieve equiaxial and spherical grains of matrix. The segregation of alloying elements of copper and iron in alloy is modified compared with directly cast samples. |
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| Keywords: | pulse current modification 7075 aluminum alloy Al-5Ti-B as-cast microstructure |
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