| Y对耐热铝导体材料铸态组织和性能的影响 |
| |
| 引用本文： | 韩钰,夏延秋,祝志祥,孙远,宾杰,李红英,杨长龙. Y对耐热铝导体材料铸态组织和性能的影响[J]. 材料科学与工艺, 2016, 24(5): 71-77. DOI: 10.11951/j.issn.1005-0299.20160512 |
| |
| 作者姓名： | 韩钰 夏延秋 祝志祥 孙远 宾杰 李红英 杨长龙 |
| |
| 作者单位： | 1. 华北电力大学 能源动力与机械工程学院，北京102206; 先进输电技术国家重点实验室 全球能源互联网研究院，北京102211;2. 华北电力大学 能源动力与机械工程学院,北京,102206;3. 先进输电技术国家重点实验室 全球能源互联网研究院,北京,102211;4. 中南大学 材料科学与工程学院,长沙,410083;5. 国网辽宁省电力有限公司,沈阳,110006 |
| |
| 基金项目： | 国家电网公司科技项目(5455DW150015; 5455DW150013; DG71-12-007). |
| |
| 摘 要： | 随着特高压输电技术在我国的大力发展,铝合金导体材料作为特高压输电线路的主要组成部分,受到业内的广泛关注.本文采用电导率测试、硬度测试、金相显微镜和扫描电镜观察等手段,研究添加不同含量稀土Y对铸态Al-Zr耐热铝导体材料的影响.研究结果表明:Y元素和Fe、Si等杂质元素形成金属间化合物,可净化基体,改变杂质相的形态和分布,使其粒子化、球化和细化.Y元素在枝晶网络和晶界分布,从而细化晶粒和枝晶组织,但添加量达到0.5%时晶粒细化不均匀.当Y含量为0.2%时,电导率达到60%IACS;当Y含量为0.3%时,硬度达到最高值20.9HBS,且电导率并无明显下降.加入0.3%Y可使耐热铝导体材料获得较好的综合性能.
|
| 关 键 词： | Y 铝导体 晶粒细化 电导率 硬度 |
| 收稿时间： | 2016-01-25 |
Effect of Yttrium on as-cast microstructure and properties of heat-resistant aluminum conductor |
| |
| HAN Yu,XIA Yanqiu,ZHU Zhixiang,SUN Yuan,BIN Jie,LI Hongying and YANG Changlong. Effect of Yttrium on as-cast microstructure and properties of heat-resistant aluminum conductor[J]. Materials Science and Technology, 2016, 24(5): 71-77. DOI: 10.11951/j.issn.1005-0299.20160512 |
| |
| Authors: | HAN Yu XIA Yanqiu ZHU Zhixiang SUN Yuan BIN Jie LI Hongying YANG Changlong |
| |
| Affiliation: | School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206,China ;State Key Laboratory of Advanced Power Transmission TechnologyGlobal Energy Interconnection Research Institute, Beijing 102211,China,School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206,China,State Key Laboratory of Advanced Power Transmission TechnologyGlobal Energy Interconnection Research Institute, Beijing 102211,China,School of Materials Science and Engineering, Central South University, Changsha 410083, China,School of Materials Science and Engineering, Central South University, Changsha 410083, China,School of Materials Science and Engineering, Central South University, Changsha 410083, China and State Grid Liaoning Electrical Power Company, Shenyang 110006, China |
| |
| Abstract: | With the development of ultrahigh-voltage transmission technology, aluminum conductors, which are important contents for ultrahigh-voltage transmission line, have attracted much attention recently. The microstructure and properties of as-cast heat-resistant Al-Zr conductor with different amounts of Y were studied by means of electrical resistivity measurement, hardness test, optical microscopy and scanning electron microscopy. The results show that intermetallic compound containing Y and impurity Fe and Si are congregated along the grain boundary and dendritic boundary, which can purify the matrix and change the morphology of impurity phase. The Y atoms distributed on grain boundaries and dendrites increased the composition undercooling of the alloy. As a result, a significant grain refinement has been observed. Alloying of Y refines the grain and dendrite of Al-0.15Zr alloy. A proper addition of Y can improve the electrical conductivity and strength of the alloy. The electrical conductivity and strength of alloys reach the maximum values by adding 0.2% and 0.3% Y, respectively. As a result, the comprehensive property of the alloy would be improved by adding 0.3%Y. |
| |
| Keywords: | Yttrium aluminum conductor grain refinement electrical conductivity hardness |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《材料科学与工艺》浏览原始摘要信息 |
|
点击此处可从《材料科学与工艺》下载全文 |
|
