Research on the Performance of Friction Stir Welding and Fusion Welding Joint of High-speed Rail Connection Plate

YU Zhikai; LIANG Chen; MAO Mengying; NIU Xujing

doi:10.7512/j.issn.1001-2303.2022.10.10

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Research on the Performance of Friction Stir Welding and Fusion Welding Joint of High-speed Rail Connection Plate
Vol. 52, Issue 10, Pages: 62-71(2022)
DOI： 10.7512/j.issn.1001-2303.2022.10.10

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郁志凯，梁晨，毛孟颖，等.动车组连接板搅拌摩擦焊及熔化焊接头性能研究［J］.电焊机，2022，52（10）：62-71.

YU Zhikai, LIANG Chen, MAO Mengying, et al.Research on the Performance of Friction Stir Welding and FusionWelding Joint of High-speed Rail Connection Plate[J].Electric Welding Machine, 2022, 52(10): 62-71.
郁志凯，梁晨，毛孟颖，等.动车组连接板搅拌摩擦焊及熔化焊接头性能研究［J］.电焊机，2022，52（10）：62-71. DOI： 10.7512/j.issn.1001-2303.2022.10.10.

YU Zhikai, LIANG Chen, MAO Mengying, et al.Research on the Performance of Friction Stir Welding and FusionWelding Joint of High-speed Rail Connection Plate[J].Electric Welding Machine, 2022, 52(10): 62-71. DOI： 10.7512/j.issn.1001-2303.2022.10.10.

摘要

对分别采用搅拌摩擦焊和熔化焊的连接板焊接接头的金相、拉伸、弯曲、硬度及疲劳性能等方面进行对比研究。两种焊接方式金相均合格；采用搅拌摩擦焊的连接板接头抗拉强度为275.67 MPa，比熔化焊（263.8 MPa）高约4.5%；搅拌摩擦焊接头弯曲性能侧弯180°均合格，熔化焊接头侧弯试件在110°左右时由于存在气孔导致裂纹出现；搅拌摩擦焊接头的硬度分布近似W形，中心层焊核区显微硬度值约为79~104 HV，在-18~-6 mm和6~18 mm范围内出现软化现象，最低硬度为69 HV，熔化焊接头的中心层焊缝区显微硬度值约为92~97 HV，在3~9 mm范围内出现软化现象，最低硬度为71 HV；搅拌摩擦焊接头中值疲劳极限为137 MPa，比熔化焊（117 MPa）高约17%。

Abstract

The metallographic, tensile, bending, hardness and fatigue properties of the high-speed rail connection plate welded joint of friction stir welding and fusion welding were compared and studied.The results show that both welding methods are qualified in metallography;The tensile strength of the joint of friction stir welding is 275.67 MPa and is about 4.5% higher than that of fusion welding, which is 263.8MPa; The bending property of friction stir welding joint is all qualified at 180°, and the crack occurs in the specimen of fusion welding head bending at about 110° due to the existence of pores;The hardness distribution of friction stir welding joint is similar to W shape, the microhardness value of the nugget zone of the central layer is about 79~104 HV, and the softening phenomenon occurs at -18~-6 mm and 6~18 mm, and the lowest hardness is 69 HV;The microhardness value of the weld zone on the central layer of the fusion welding joint is about 92~97 HV, the softening phenomenon occurs at about 3~9 mm, and the lowest hardness is 71 HV;The median fatigue limit of friction stir welding joint is 137 MPa and is about 17% higher than that of fusion welding, which is 117 MPa.

关键词

6082-T6铝合金搅拌摩擦焊熔化焊显微硬度疲劳性能。

Keywords

6082-T6 aluminum alloyfriction stir weldingfusion weldingmicrohardnessfatigue performance

references

侯振国，钮旭晶，李充，等. 搅拌摩擦焊技术在高速列车制造中的应用［J］.电焊机，2018，48（3）：32-36.

Hou Z G，Niu X J，Li C，et al. Application of friction stir welding technology for the high-speed train manufacturing［J］. Electric Welding Machine，2018，48（3）：32-36.

方宇欣，许鸿吉，金鹏.6082-T6厚板铝合金FSW焊接接头组织与力学性能研究［J］.焊接技术，2019，48（12）：23-25.

Fan Y X，Xu H J，Jin P. Study on Microstructure and Mechanical Properties of FSW Welded Joint of 6082-T6 Thick Plate Aluminum Alloy［J］. Welding Technology，2019，48（12）：23-25.

P.M.G.P. Moreiraet al. Fatigue behavior of FSW and MIG weldments for two aluminum alloys［J］. Theoretical and Applied Fracture Mechanies， 2007，（48）：169-177.

庹文海，杨尚磊，杨文涛.轨道交通用6082-T6铝合金MIG焊接接头组织与疲劳性能［J］.材料导报，2015，20：105-109.

Tuo W H，Yang S L，Yang W T.Microstructure and Fatigue Performance of MIG Welded Joint of 6082-T6 Aluminum Alloy Used for Rail Transportation［J］. Materials Review，2015，20：105-109.

秦丰，周军，侯振国.6082铝合金双面搅拌摩擦焊接头组织与性能［J］.焊接学报，2021（02）：75-80.

Qin F，Zhou J，Hou Z G. Research on microstructure and properties of double-sided friction stir welding joint of 6082 aluminum alloy［J］. Transactions of The China Welding Institution，2021（02）：75-80.

钮旭晶，侯振国，鲁二敬.轨道车辆用6082铝合金搅拌摩擦焊焊接接头性能研究［J］.金属加工（冷加工），2016（S1）：842-844.

Niu X J，Hou Z G，Lu E J. Study on properties of friction stir welding joint of 6082 aluminum alloy for railway vehicles［J］. MW Metal Cutting，2016（S1）：842-844.

张航，宫文彪，赵立哲.6082-T6铝合金搅拌摩擦焊“S”线的形成及其对接头组织性能的影响［J］.热加工工艺，2020，23：23-26.

Zhang H， Gong W B，Zhao L Z. Formation of "S" Line and Its Influences on Microstructure and Properties of Friction Stir Welded 6082-T6 Aluminum Alloy［J］. Hot Working Technology，2020，23：23-26.

靳佳霖，徐国富，李耀.焊丝成分对6082-T6铝合金焊接接头组织和性能的影响［J］.中国有色金属学报，2020（01）：1-8.

Jin J L，Xu G F，Li Y. Effect of welding wire composition on microstructure and properties of 6082-T6 aluminum alloy welded joints［J］. The Chinese Journal of Nonferrous Metals，2020（01）：1-8.

邓舒浩，邓运来，张臻.焊接工艺对6082-T6铝合金FSW接头微观组织与力学性能的影响［J］. 中南大学学报：自然科学版，2018（10）： 2413-2422.

Deng S H，Deng Y L，Zhang Z. Effect of welding parameters on microstructure and mechanical properties of 6082-T6 aluminum alloy FSW joint［J］. Journal of Central South University：Science and Technology，2018（10）： 2413-2422.

王希靖，魏学玲，张亮亮.6082-T6铝合金搅拌摩擦焊组织演变与力学性能［J］.焊接学报，2018（03）：1-5.

Wang X J，Wei X L，Zhang L L. Microstructural evolution and mechanical properties of friction stir welded 6082-T6 aluminum alloy［J］. Transactions of the China Welding Institution，2018（03）：1-5.

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