Improvement of Friction Flow Spot Welding for 6061-T6 Aluminum Alloy

Liu Shoufa; Cai Yun; Li Chunfeng; Wu Songlin

doi:10.15980/j.tzzz.2015.01.033

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Improvement of Friction Flow Spot Welding for 6061-T6 Aluminum Alloy
Vol. 35, Issue 1, Pages: 110-112(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.01.033

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[1]刘守法,蔡云,李春风,吴松林.6061-T6铝合金塑流摩擦点焊技术的改进[J].特种铸造及有色合金,2015,35(01):110-112.

Liu Shoufa, Cai Yun, Li Chunfeng, et al. Improvement of Friction Flow Spot Welding for 6061-T6 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 35(1):110-112(2015)
[1]刘守法,蔡云,李春风,吴松林.6061-T6铝合金塑流摩擦点焊技术的改进[J].特种铸造及有色合金,2015,35(01):110-112. DOI： 10.15980/j.tzzz.2015.01.033.

Liu Shoufa, Cai Yun, Li Chunfeng, et al. Improvement of Friction Flow Spot Welding for 6061-T6 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 35(1):110-112(2015) DOI： 10.15980/j.tzzz.2015.01.033.

摘要

根据同种金属自我配对可提高摩擦因数的原理

利用改进的无针搅拌头对6061-T6铝合金进行了塑流摩擦焊。利用宏观形貌观察、拉伸试验等方法

分析了焊缝的拉伸断裂机制。研究表明

在搅拌头内嵌入与被焊材料相同的棒料

可增大搅拌头与工件间的摩擦力和黏附性

从而增大焊缝塑流区厚度。嵌入搅拌头中的棒料直径越大

焊接温升率就会越高。嵌入搅拌头棒料直径增大为10mm时

焊缝抗拉强度提高为250 MPa

达到母材强度的86%

为普通无针搅拌头焊缝的1.48倍。

Abstract

According to the principle that self-pairing of the same metal could increase the friction coefficient

friction flow welding was conducted on 6061-T6 aluminum alloy by using improved pinless friction stirring tool.Tensile fracture mechanism of the weld was analyzed using macro-morphology analysis and tensile testing.The results show that embedding the material to be welded in form of bar into the friction stir tool can increase friction and adhesion between the friction stir tool and the workpiece

thereby increasing thickness of the plastic zone of the weld.The larger the diameter of the bar embedded into the friction stir tool

the higher the soldering temperature-increment rise rate.When diameter of the bar reaches 10 mm

tensile strength of the weld reach up to 250MPa（86% of the base material）

which is1.8times of the sample welded with ordinary friction stir tool.