高速列车铝合金车体典型接头激光-MIG复合焊接特性研究
Study on Laser-MIG Hybrid Welding Characteristics of Typical Joints of Aluminum Alloy Carbody for High Speed Train
- 2022年52卷第10期 页码:1-8
DOI: 10.7512/j.issn.1001-2303.2022.10.01
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姜艳,马国龙,马寅,等.高速列车铝合金车体典型接头激光-MIG复合焊接特性研究[J].电焊机,2022,52(10):1-8.
JIANG Yan, MA Guolong, MA Yin, et al.Study on Laser-MIG Hybrid Welding Characteristics of Typical Joints of Aluminum Alloy Carbody for High Speed Train[J].Electric Welding Machine, 2022, 52(10): 1-8.
针对传统高速列车3 mm厚A6N01S-T5铝合金型材典型接头结构开展激光-MIG复合焊接试验,优化复合焊接工艺参数,分析接头组织性能,研究激光-MIG复合焊的工程适应性。结果表明,在最佳工艺参数下,焊缝成形良好、无气孔缺陷。焊缝中心为树枝状铸态组织,靠近熔合线焊缝为柱状晶组织,熔合区较窄但热影响区存在晶粒轻微粗大现象;焊缝区硬度低于母材区,硬度最小值位于熔合线附近的热影响区;最佳工艺参数下接头的平均抗拉强度为204.6 MPa,达到母材的83.5%;断裂发生在熔合线附近,断口形貌呈现典型的塑性断裂特征;接头的弯曲性能良好;组对间隙小于1.0 mm时,最佳工艺参数具有通用性,焊缝成形及接头抗拉强度良好;组对间隙增至1.5 mm时,优化工艺参数焊缝成形及接头抗拉强度依然良好。结果表明,激光-MIG复合焊对高速列车铝合金车体典型接头具有良好的焊接可行性和工程适应性。
In order to expand the application of laser-MIG hybrid welding in the manufacturing of aluminum alloy car body profiles for high-speed train, laser-MIG hybrid welding experiments were carried out to weld typical joint structure of traditional 3 mm thick A6N01S-T5 aluminum alloy for high speed train in this work. The welding parameters were optimized, structure and property of joints were analyzed. The adaptability of the laser-MIG hybrid welding was also studied. The experimental results show that the weld is well formed and no porosity defects with the optimal welding parameters. The microstructure in the weld center is dendritic as cast structure, and near the bond line is columnar crystal structure. The bond zone is narrow, but the grain is slightly coarse in the heat-affected zone. The hardness of weld metal zone is lower than that of the base metal zone, and the minimum hardness is located in the heat-affected zone near the bond line. The average tensile strength of the joints with the optimal welding parameters is 204.6 MPa, reaching 83.5% of the base metal. The tensile sample fractures near the bond line and the fracture morphology showes typical plastic fracture characteristics. And the joint has good bending performance. The optimal welding parameters has good commonality when the assembled gap less than 1.0 mm, the weld formation and joint tensile strength are fine. The weld formation and joint tensile strength are still good with the optimized welding parameters when the assembled gap increases to 1.5 mm. The research results prove that the laser-MIG hybrid welding has good feasibility and adaptability in typical joints of aluminum alloy carbody for high speed train.
铝合金激光-MIG复合焊焊缝成形气孔缺陷组织性能
aluminum alloylaser-MIG hybrid weldingweld formationporosity defectsmicrostructure properties
Han X H,Yang Z B,Ma Y,et al. Comparative study of laser-arc hybrid welding for AA6082-T6 aluminum alloy with two different arc modes[J].Metals,2020,10:407.
Wang D, Zhang C S, Wang C X, et al. Application and analysis of spread die and flat container in the extrusion of a large-size, hollow, and flat-wide aluminum alloy profile[J]. International Journal of Advanced Ma-nufacturing Technology. 2018, 94(9-12): 4247-4263.
韩晓辉, 李帅贞, 毛镇东, 等. 高速列车用6106-T6铝合金型材激光-电弧复合焊接工艺及接头性能[J]. 中国激光, 2019, 46(12): 86-94.
Han X H, Li S Z, Mao Z D, et al. Laser-arc hybrid welding process and joint performances of 6106-T6 aluminum alloy profiles for high speed trains[J]. Chinese Journal of Lasers, 2019, 46(12): 86-94.
Jiang Z, Hua X M, Huang L J, et al. Double-sided hybrid laser-MIG welding plus MIG welding of 30-mm-thick aluminium alloy[J]. International Journal of Advanced Manufacturing Technology,2018,97: 903-913.
彭蝶,张连华,韩晓辉,等.轨道交通制造焊接技术应用现状及发展趋势[J].金属加工(热加工),2020,8:6-13.
Peng D, Zhang L H, Han X H,et al. Application status and development trend of welding technology for rail transit manufacturing[J]. Metal working (Hot working), 2020, 8: 6-13.
韩晓辉, 张志毅, 李刚卿, 等. 轨道客车轻量化材料及其连接技术的发展与展望[J]. 焊接, 2020, 10: 34-42.
Han X H, Zhang Z Y, Li G Q, et al. Development and prospect of lightweight material and connection technology of rail bus[J]. Welding, 2020, 10: 34-42.
刘春宁, 胡文浩. 激光-MIG电弧复合焊接技术在高速列车铝合金车体焊接中的应用研究[J]. 金属加工(冷加工), 2016, S1: 555-560.
Liu C N, Hu W H. Application of laser-MIG hybrid welding technology in aluminum alloy body welding of high-speed train[J]. Metal Working (Cold Working), 2016, S1: 555-560.
陈辉,苟国庆,朱宗涛,等.激光-MIG复合焊工艺及其在轨道交通领域应用现状[J].电焊机,2015,45(5):11-14.
Chen H, Gou G Q, Zhu Z T, et al. Laser-compound MIG welding process and its application status in the field of rail transit[J]. Electric Welding Machine, 2015, 45(5): 11-14.
王秋影,邱培现,陈辉.激光的加入对激光-MIG复合焊熔滴过渡的影响研究[J].电焊机,2020,50(03):126-130.
Wang Q Y,Qiu P X,Chen H. Effect of laser on metal transfer behavior of laser-MIG hybrid welding[J]. Electric Welding Machine,2020,50(03):126-130.
赵耀邦,张小龙,李中权,等.铝合金激光焊接技术研究进展[J].电焊机,2017,47(02):8-12.
Zhao Y B,Zhang X L,Li Z Q,et al. Development of laser welding for aluminum alloy[J]. Electric Welding Machine,2017,47(02):8-12.
汪认, 方喜凤, 邱培现. A7N01铝合金激光-MIG复合焊接工况适应性研究[J]. 电焊机, 2014, 44(12): 149-152.
Wang R, FANG X F, Qiu P X. Research on suitability for operation condition of laser-MIG hybrid welding of A7N01 aluminum alloy[J]. Electric Welding Machine, 2014, 44(12): 149-152.
马寅, 韩晓辉, 杨志斌, 等. 坡口尺寸对铝合金激光-MIG复合焊焊缝成形及力学性能的影响[J]. 大连交通大学学报, 2021, 42(1): 58-61.
Ma Y, Han X H, Yang Z B,et al. Effects of groove size on weld formation and mechanical property of laser-MIG hybrid welded aluminum alloy joint[J]. Journal of Dalian Jiaotong University, 2021, 42(1): 58-61.
李福泉,冯时,李明伟,等. 6082铝合金激光填丝焊热影响区的软化现象[J].中国激光, 2018, 45:1102007.
Li F Q, Feng S, Li M W, et al. Softening phenomenon of heat-affected zone in laser welding of 6082 Al alloys with filler wire[J]. Chinese Journal of Lasers, 2018, 45: 1102007.
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