高性能金属铝的制备、微观结构及其热稳定性

doi:10.13229/j.cnki.jdxbgxb201705028

吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 1542-1547.doi: 10.13229/j.cnki.jdxbgxb201705028

高性能金属铝的制备、微观结构及其热稳定性

汤华国^{1, 2, 3}, 马贤锋^{1, 2}, 赵伟^{1, 2}, 刘建伟^{1, 2}, 赵振业^{1, 2}

1.中国科学院长春应用化学研究所,长春 130021;
2.中国科学院稀土资源利用国家重点实验室,长春 130021;
3.中国科学院大学,北京100049

收稿日期:2016-05-10 出版日期:2017-09-20 发布日期:2017-09-20
作者简介:汤华国(1978-),男,副研究员,博士研究生.研究方向:高性能铝合金.E-mail:laotang@ciac.ac.cn
基金资助:
吉林省科技攻关重点项目(20150204002GX)

Synthesis microstructure and thermal properties of high performance bulk Al

TANG Hua-guo^{1, 2, 3}, MA Xian-feng^{1, 2}, ZHAO Wei^{1, 2}, LIU Jian-wei^{1, 2}, ZHAO Zhen-ye^{1, 2}

1.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130021, China;
2.State Key Laboratory of Rare Earth Resource Utilization, Chinese Academy of Sciences, Changchun 130021, China;
3.University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-05-10 Online:2017-09-20 Published:2017-09-20

摘要/Abstract

摘要：

利用机械制粉、冷等静压和快速压锻工艺制备得到了一种耐热金属铝,该材料晶粒尺寸为0.6~4 μm,室温抗拉强度为536 MPa, 达到商业高强铝合金的性能水平,同时材料具有优异的高温性能。通过4320 h高温热暴露实验研究发现,材料在200、300、350 ℃下的持久强度分别达到为381、242和178 MPa,较热暴露实验之前的性能只分别下降了1.3 %、1.5 %和1.8 %,其耐高温机制是材料在制备过程引入的第二相夹杂在晶界间,起到抑制晶粒长大的作用。

关键词: 金属材料, 超细金属铝, 机械球磨, 快速压锻, 热稳定性

Abstract:

Heat resistant bulk Al was prepared by mechanical milling, cold isostatic pressing and press-forming technique. The bulk Al possesses stable microstructure, with grain size between 0.6 and 4 μm, and the ultimate tensile strength, 536 MPa, surpasses that of most commercial Al alloys, especially at high temperature. The heat exposure experiment was carried out at 200 ℃, 300 ℃ and 350 ℃ for 4320 h. The high temperature endurance strength is 381 MPa, 242 MPa and 178 MPa corresponding to 200 ℃, 300 ℃ and 350 ℃ respectively. The pinning action of the second-phase dispersoids in bulk Al highly restrains grain growth during the process of hating.

Key words: metallic materials, bulk ultrafine Al, mechanical milling, press-forming, thermal stability

中图分类号:

汤华国, 马贤锋, 赵伟, 刘建伟, 赵振业. 高性能金属铝的制备、微观结构及其热稳定性[J]. 吉林大学学报(工学版), 2017, 47(5): 1542-1547.

TANG Hua-guo, MA Xian-feng, ZHAO Wei, LIU Jian-wei, ZHAO Zhen-ye. Synthesis microstructure and thermal properties of high performance bulk Al[J]. 吉林大学学报(工学版), 2017, 47(5): 1542-1547.

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高性能金属铝的制备、微观结构及其热稳定性

Synthesis microstructure and thermal properties of high performance bulk Al

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