东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (6): 854-858.DOI: -

• 材料与冶金 • 上一篇    下一篇

钪铒微合金化对7A52合金焊缝组织与性能的影响

徐振1，赵志浩1，李莹2，董宇3   

  1. (1.东北大学材料电磁过程研究教育部重点实验室，辽宁沈阳110819；2.营口职业技术学院机电系，辽宁营口115000；3.东北大学研究院，辽宁沈阳110819)
  • 收稿日期:2012-11-26 修回日期:2012-11-26 出版日期:2013-06-15 发布日期:2013-12-31
  • 通讯作者: 徐振
  • 作者简介:徐振(1987-)，男，辽宁鞍山人，东北大学博士研究生.
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N110408005)；国家自然科学基金青年基金资助项目(51004036).

Effects of Scandium and Erbium Microalloying on Microstructures and Properties of Weld Joint of 7A52 Alloys

XU Zhen1， ZHAO Zhihao1， LI Ying2， DONG Yu3   

  1. 1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. Department of Mechanical and Electrical Engineering， Yingkou Vocational and Technical College， Yingkou 115000， China; 3. Research Institute， Northeastern University， Shenyang 110819， China.
  • Received:2012-11-26 Revised:2012-11-26 Online:2013-06-15 Published:2013-12-31
  • Contact: ZHAO Zhihao
  • About author:-
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摘要： 采用传统ER5183焊丝及单独和复合添加Sc，Er的自制5183焊丝对7A52铝合金进行钨电极惰性气体保护焊，并对焊接接头的力学性能和焊缝显微组织进行了研究.结果表明，拉伸断裂均在焊缝中心处，焊缝处是焊接接头的最薄弱环节，其次是焊接热影响区内的软化区.在ER5183焊丝中添加微量元素Sc和Er可有效细化焊缝处的组织，提高合金焊接接头的强度，其中单独添加Sc的焊丝效果最好，单独添加Er的焊丝效果次之.焊接接头的抗拉强度可达3324MPa，是母材强度的725%.

关键词: 焊接接头, 微合金化, 显微组织, 力学性能, 7A52合金

Abstract: 7A52 aluminum alloy was welded using traditional ER5183 welding wires and selfmade 5183 welding wires containing Sc， Er and Sc/Er by TIG welding method. Mechanical properties and microstructures of the welded joints were studied. The results showed that all the tensile fracture occurred in the center of the weld joints and the weld zone was the weakest link in the weld joints， followed by the soften zone in the heataffected zone. The additions of Sc and Er to ER5183 welding wire fined grains of weld joints significantly and increased the strength of the welded joint. The best result was achieved with the addition of Sc independently， followed by the addition of Er alone. The tensile strength of the welded joints reached 3324MPa， and was 725% of that of the base material.

Key words: weld joint, microalloying, microstructure, mechanical properties, 7A52 alloy

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