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材料工程  2016, Vol. 44 Issue (6): 70-75    DOI: 10.11868/j.issn.1001-4381.2016.06.011
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
焊后热处理对7A04铝合金水下搅拌摩擦焊接接头组织性能的影响
郝亚鑫, 王文, 徐瑞琦, 乔柯, 李天麒, 王快社
西安建筑科技大学 冶金工程学院, 西安 710055
Effect of Post Weld Heat Treatment on Microstructure and Mechanical Properties of Submerged Friction Stir Welded 7A04 Aluminum Alloy
HAO Ya-xin, WANG Wen, XU Rui-qi, QIAO Ke, LI Tian-qi, WANG Kuai-she
School of Metallurgical Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
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摘要 对7A04铝合金板进行水下搅拌摩擦焊接(Submerged Friction Stir Welding, SFSW),并对焊接接头进行焊后热处理(Post Weld Heat Treatments, PWHT),研究焊后热处理对接头组织性能的影响。结果表明:焊后热处理接头呈现出弥散分布的细小析出相形貌,明显优于SFSW接头呈现出的少量析出相分散分布的特征。与SFSW接头相比,焊后热处理明显改善接头的力学性能。接头焊核区的平均硬度值提高了39.7HV,抗拉强度提高了67MPa,达到母材抗拉强度的96.1%,接头的应变硬化能力增强,拉伸断口呈现微孔聚合和解理混合断裂特征。
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郝亚鑫
王文
徐瑞琦
乔柯
李天麒
王快社
关键词 焊后热处理水下搅拌摩擦焊接7A04铝合金组织性能    
Abstract:7A04 aluminum alloy plate was jointed by submerged friction stir welding(SFSW), and welded joints were treated (Post Weld Heat Treatment, PWHT), and the effect of post weld heat treatment on the microstructure and mechanical properties in SFSW was investigated. The results show that PWHT joints exhibit dispersively distributed fine precipitates phase morphology, are significantly superior than the feature of the small amount of precipitates with dispersed distribution in SFSW joints. Compared with SFSW joints, the mechanical properties of joints are improved significantly by PWHT. The average hardness of the weld joints nugget zone is increased by 39.7HV, and the tensile strength is increased by 67MPa, reaches 96.1% of the base material, strain hardening capacity of the joints is also enhanced, the tensile fracture exhibits mixed fracture feature of microporous polymerization and cleavage.
Key wordspost weld heat treatment    submerged friction stir welding    7A04 aluminum alloy    microstructure and mechanical property
收稿日期: 2015-01-12      出版日期: 2016-06-13
1:  TG456.5  
通讯作者: 王文(1985-),男,工程师,博士,从事搅拌摩擦焊接及加工研究,联系地址:西安市碑林区雁塔路13号西安建筑科技大学冶金工程学院(710055),E-mail:282361936@qq.com     E-mail: 282361936@qq.com
引用本文:   
郝亚鑫, 王文, 徐瑞琦, 乔柯, 李天麒, 王快社. 焊后热处理对7A04铝合金水下搅拌摩擦焊接接头组织性能的影响[J]. 材料工程, 2016, 44(6): 70-75.
HAO Ya-xin, WANG Wen, XU Rui-qi, QIAO Ke, LI Tian-qi, WANG Kuai-she. Effect of Post Weld Heat Treatment on Microstructure and Mechanical Properties of Submerged Friction Stir Welded 7A04 Aluminum Alloy. Journal of Materials Engineering, 2016, 44(6): 70-75.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.06.011      或      http://jme.biam.ac.cn/CN/Y2016/V44/I6/70
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