东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (1): 77-80.DOI: -

• 论著 • 上一篇    下一篇

低频电磁铸造7050铝合金的组织与性能

左玉波;崔建忠;赵志浩;朱庆丰;   

  1. 东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室;东北大学材料电磁过程研究教育部重点实验室 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-01-15 发布日期:2013-06-22
  • 通讯作者: Zuo, Y.-B.
  • 作者简介:-
  • 基金资助:
    国家重大基础研究发展规划项目(2005CB623707)

Structure and properties of 7050 alloy prepared through low frequency electromagnetic casting process

Zuo, Yu-Bo (1); Cui, Jian-Zhong (1); Zhao, Zhi-Hao (1); Zhu, Qing-Feng (1)   

  1. (1) Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-01-15 Published:2013-06-22
  • Contact: Zuo, Y.-B.
  • About author:-
  • Supported by:
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摘要： 采用新型低频电磁铸造技术制备了7050铝合金120 mm铸锭,研究了低频电磁场对铸锭组织和性能的影响.并对比研究了常规DC铸造和低频电磁铸造铸锭挤压和热处理后的组织与性能.结果表明,低频电磁铸造显著细化晶粒组织,并使组织分布均匀,改善铸锭的铸态力学性能.固溶并时效处理后,常规DC铸锭挤压棒材抗拉强度达到676.5 MPa,延伸率达到11.2%;低频电磁铸锭挤压棒材抗拉强度略有提高,达到677.5 MPa,延伸率提高较大,达到13.2%.低频电磁铸造对7050铝合金挤压棒材最终抗拉强度影响不大,但能够显著提高延伸率.

关键词: 7050铝合金, 低频电磁铸造, 微观组织, 力学性能

Abstract: The φ120 mm ingots of 7050 alloy were prepared through a new process, i.e. LFEC (low frequency electromagnetic casting). Investigates how the low frequency electromagnetic field affects the structure and mechanical properties of the as-cast ingots. Then, the microstructure and mechanical properties of the ingots after extrusion and heat-treatment were studied in comparison with those prepared through DC casting. The results showed that LFEC can get grain refining and homogenize structural distribution to improve as-cast tensile strength and elongation. After solution and ageing treatments, the tensile strength/percentage elongation of extruded specimens through LFEC process and conventional DC process are 677.5 MPa/13.2% and 676.5 MPa/11.2% respectively. A conclusion is thus drawn that the LFEC process has no significant effect on final tensile strength of extruded 7050 alloy rods, but can improve their final percentage elongation.

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