7050-T7451铝合金搅拌摩擦焊接头组织和性能

doi:10.11896/cldb.22030282

材料导报

2023, Vol. 37

Issue (24): 22030282-5 https://doi.org/10.11896/cldb.22030282

金属与金属基复合材料

7050-T7451铝合金搅拌摩擦焊接头组织和性能

张兵宪^1,*, 陈聪², 刘丰刚², 牛鹏亮², 刘强², 黄春平²

1 中航西安飞机工业集团股份有限公司,西安 710087
2 南昌航空大学航空制造工程学院,南昌 330063

Microstructure and Properties of Friction Stir Welding 7050-T7451 Aluminum Alloy

ZHANG Bingxian^1,*, CHEN Cong², LIU Fenggang², NIU Pengliang², LIU Qiang², HUANG Chunping²

1 Avic Xi’an Aircraft Industry Group Company Ltd., Xi’an 710087, China
2 School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China

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摘要在不同焊接工艺参数下对3.5 mm厚的7050-T7451铝合金进行了搅拌摩擦对接焊,并对焊缝成形质量、接头微观组织演变和拉伸性能进行了深入研究。结果表明,当搅拌头旋转速度(ω)在400～1 000 r/min、焊接速度(v)在50～300 mm/min时,均可获得内部无缺陷的接头。当焊接速度不变时,随搅拌头旋转速度的增加,接头的拉伸性能先增大后减小。当搅拌头旋转速度为600 r/min、焊接速度为150 mm/min 时,接头的拉伸性能最好,抗拉强度为475 MPa,强度系数达90%,伸长率为5.7%。当ω/v的值处于4～6之间时,可获得拉伸性能优良的接头。

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关键词: 7050铝合金搅拌摩擦焊微观组织力学性能

Abstract: 3.5 mm thick 7050-T7451 aluminum alloy was friction stir butt welded at various welding parameters. The forming quality of weld, microstructure evolution and tensile properties of the welded joints were studied in detail. The results show that the joint without internal defects can be obtained when the rotational speed (ω) is in the range of 400—1 000 r/min and the welding speed (v) is in the range of 50—300 mm/min. When the welding speed is constant, the tensile properties of the joints increase and then decrease with the increase of the rotating speed. When the rotation speed is 600 r/min and the welding speed is 150 mm/min, the tensile strength of the joint is 475 MPa, the strength coefficient is 90% and the elongation is 5.7%. When the value of ω/v is between 4 and 6, the joints with good tensile properties can be fabricated.

Key words: 7050 aluminum alloy friction stir welding microstructure mechanical property

发布日期: 2023-12-19

ZTFLH:

TG453

基金资助: 国家自然科学基金青年基金(52105357)

通讯作者: *张兵宪,高级工程师,2001年7月、2009年5月分别于沈阳工业大学、西安理工大学获得工学学士学位和硕士学位。现为中航西安飞机工业集团股份有限公司高级工程师。目前主要研究领域为航空材料的研发与焊接。zhbx77@163.com

引用本文:

张兵宪, 陈聪, 刘丰刚, 牛鹏亮, 刘强, 黄春平. 7050-T7451铝合金搅拌摩擦焊接头组织和性能[J]. 材料导报, 2023, 37(24): 22030282-5.
ZHANG Bingxian, CHEN Cong, LIU Fenggang, NIU Pengliang, LIU Qiang, HUANG Chunping. Microstructure and Properties of Friction Stir Welding 7050-T7451 Aluminum Alloy. Materials Reports, 2023, 37(24): 22030282-5.

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http://www.mater-rep.com/CN/10.11896/cldb.22030282 或 http://www.mater-rep.com/CN/Y2023/V37/I24/22030282

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