2A14铝合金FSW焊缝背部线状缺陷返修工艺
Repair Process of Linear Defects on the Back of 2Al4 Aluminum Alloy FSW Weld
- 2023年53卷第3期 页码:117-123
DOI: 10.7512/j.issn.1001-2303.2023.03.14
扫 描 看 全 文
扫 描 看 全 文
许辉,刘宽,徐耀钟,等.2A14铝合金FSW焊缝背部线状缺陷返修工艺[J].电焊机,2023,53(3):117-123.
XU Hui, LIU Kuan, XU Yaozhong, et al.Repair Process of Linear Defects on the Back of 2Al4 Aluminum Alloy FSW Weld[J].Electric Welding Machine, 2023, 53(3): 117-123.
针对2A14铝合金搅拌摩擦焊(FSW)焊缝背部线状缺陷,设计了4种不同的方案对其进行返修,分析了不同返修方法对焊缝缺陷消除、接头力学性能以及接头组织的影响,研究了其焊缝背部缺陷返修的工艺特性。结果表明,4种方法均可消除未焊透缺陷。直接采用FSW返修可返修4次,但多次返修会造成焊缝减薄,抗拉强度下降,重复搅拌摩擦焊对焊缝组织影响较小;打磨焊缝背部缺陷后,采用TIG焊填料焊缝正面后再进行FSW返修,焊缝无明显减薄,抗拉强度有一定的下降,且2次返修的抗拉强度较一次有明显下降,次数应不超过2次,焊缝中残留的熔焊支状晶降低了返修后的接头性能;打磨后采用TIG焊填料并修平后进行FSW返修,两次返修接头强度未出现降低,熔焊填料的组织能够全部转化为FSW组织;打磨背部缺陷后TIG填料也能消除未焊透缺陷,但出现了明显的气孔甚至裂纹缺陷,强度严重下降,不宜采用。此外,选用较大的尺寸的搅拌头有助于维持焊缝强度。
The linear defect on the back of 2A14 aluminum alloy friction stir welding (FSW) was repaired, analyzed the effects of different repair methods on the elimination of weld defects, mechanical properties and microstructure of the joint, and studied the process characteristics of the repair of weld back defects. The results show that four methods can eliminate incomplete penetration defects. Directly using FSW for repair can be repaired four times, but multiple repairs can cause weld thinning and tensile strength reduction. Repeated friction stir welding has a small impact on weld microstructure; After polishing the defects on the back of the weld, use TIG welding filler on the front side of the weld, and then conduct FSW repair, the weld has no obvious thinning, and the tensile strength has decreased to a certain extent. The tensile strength of the two repairs has decreased significantly compared to that of the first one, and the number of times should not exceed 2. The residual fusion welding dendrites in the weld reduce the performance of the repaired joint; After polishing, TIG welding filler was used and smoothed, and FSW repair was performed, the strength of the joint repaired twice did not decrease, and the microstructure of the fusion welding filler could be fully converted to FSW microstructure; After polishing the back defects, TIG filler can also eliminate the lack of penetration defects, but there are obvious air holes and even cracks, which seriously reduce the strength and are not suitable for use. In addition, selecting a larger size stirring head helps to maintain weld strength.
2A14铝合金搅拌摩擦焊背部线状缺陷返修
2A14 aluminum alloyfriction stir weldingback linear defectrepair
LIU H J, ZHANG H J. Repair welding process of friction stir welding groove defect[J]. Transactions of Nonferrous Metals Society of China,2009,19(03):563-567.
刘育宁,张健,刘德博,等. TIG补焊对2219铝合金搅拌摩擦焊接接头微观组织及性能影响[J]. 宇航材料工艺, 2022, 52(06): 77-82.
LIU Y N, ZHANG J, LIU D B, et al. Effect of TIG repair welding on microstructure and properties of 2219 aluminum alloy friction stir welded joints[J]. Aerospace Materials & Technology, 2022,52 (06): 77-82
刘会杰,张会杰,黄永宪,等. 搅拌摩擦焊接缺陷的补焊方法[J]. 焊接学报,2009, 30(01): 1-4.
LIU H J, ZHANG H J, HUANG Y X, et al. Study of repair welding technology of friction stir welding defects[J]. Transactions of the China Welding Institution, 2009, 30(01): 1-4.
徐海涛,李静,褚雪峰,等. 返修工艺对6005-T6铝合金型材搅拌摩擦焊接头性能的影响[J]. 电焊机,2020, 50(01): 102-104.
XU H T, LI J, ZHU X F, et al. Influence of repair on properties of friction stir welding of 6005-T6 alloy profile joints[J]. Electric Welding Machine,2020,50(01):102-104.
刘凯旋,孙转平,杨新岐,等. 铝合金搅拌摩擦焊缝摩擦塞补焊组织与力学性能[J]. 焊接学报,2019,40(06):118-125.
LIU K X, SUN Z P, YANG X Q, et al. Microstructure and mechanical properties of friction plug welding for friction stir welded aluminum alloy[J]. Transactions of the China Welding Institution,2019,40(06):118-125.
李伟坡,李海洋,石康柠,等. 搅拌摩擦焊补焊试验研究[J]. 热加工工艺,2017,46(07):32-34.
LI W P, LI H Y, SHI K N, et al. Experimental Study on Friction Stir Repair Welding[J]. Hot Working Technology, 2017, 46(07): 32-34.
陈雨,丁桦. 异种铝合金搅拌摩擦焊的流动行为及补焊对焊核区组织性能的影响[J]. 材料与冶金学报,2018,17(04):284-292.
CHEN Y, DING H. Material flow during friction stir welded dissimilar aluminum alloys and effects of repair-welding on the microstructures sand mechanical properties of nugget zone[J]. Journal of Materials and Metallurgy, 2018, 17(04): 284-292.
周利,韩柯,刘朝磊,等. 2219铝合金搅拌摩擦焊接头缺陷补焊[J]. 航空材料学报,2016,36(01):26-32.
ZHOU L, HAN K, LIU C L, et al. Repair Welding of Defects in 2219 Al Alloy Friction Stir Welded Joints[J]. Journal of Aeronautical Materials, 2016, 36(01): 26-32.
张欣盟,何广忠,张行,等. 6005A铝合金型材搅拌摩擦焊未焊合缺陷的搅拌摩擦补焊研究[J]. 焊接,2016(11):37-40.
ZHANG X M, HE G Z, ZHANG H. et al. Repairing of penetration defect for 6005A aluminum by friction stir welding[J]. Welding & Joining, 2016(11): 37-40.
夏志华,王峰. 2A14-T4铝合金搅拌摩擦焊焊接热输入对焊缝表面成形的影响[J]. 热加工工艺,2016,45(13):197-201.
XIA Z H, WANG F. Influence of Friction Stir Welding Heat Input on Weld Bead Shaping of Aluminum Alloy 2A14-T4[J]. Hot Working Technology,2016,45(13):197-201.
赵英杰,孟占兴,孙广达,等. 2A14铝合金熔焊与搅拌摩擦焊交叉接头组织与力学性能[J]. 宇航材料工艺,2020,50(04):98-102.
ZHAO Y J, MENG Z X, SUN G D, et al. Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Intersection Joints by Tig Welding and Friction Stir Welding[J]. Aerospace Materials & Technology,2020,50(04):98-102.
编辑部网址:http://www.71dhj.comhttp://www.71dhj.com
相关作者
相关机构