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铝硅镀层热成形钢拼焊板箔材填充激光焊的组织与性能研究

林文虎, 李芳, 华学明

林文虎, 李芳, 华学明. 铝硅镀层热成形钢拼焊板箔材填充激光焊的组织与性能研究[J]. 焊接学报, 2023, 44(6): 90-94. DOI: 10.12073/j.hjxb.20220222003
引用本文: 林文虎, 李芳, 华学明. 铝硅镀层热成形钢拼焊板箔材填充激光焊的组织与性能研究[J]. 焊接学报, 2023, 44(6): 90-94. DOI: 10.12073/j.hjxb.20220222003
LIN Wenhu, LI Fang, HUA Xueming. Microstructure and mechanical performance of Al-Si coated laser welded hot stamped steel with foils[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(6): 90-94. DOI: 10.12073/j.hjxb.20220222003
Citation: LIN Wenhu, LI Fang, HUA Xueming. Microstructure and mechanical performance of Al-Si coated laser welded hot stamped steel with foils[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(6): 90-94. DOI: 10.12073/j.hjxb.20220222003

铝硅镀层热成形钢拼焊板箔材填充激光焊的组织与性能研究

基金项目: 上海市青年科技英才扬帆计划(21YF1428800),上海市晨光计划(21CG71A)
详细信息
    作者简介:

    林文虎,1991年出生,博士,助理研究员;主要从事激光制造方面的科研和教学工作,Email: linwh_mse2009@163.com

  • 中图分类号: TG 456

Microstructure and mechanical performance of Al-Si coated laser welded hot stamped steel with foils

  • 摘要: 铝硅镀层热成形钢是一种重要的汽车用先进高强钢,但在拼焊板制造过程中受到铝硅镀层的影响,焊接接头的性能远低于母材. 文中选择了3种相同厚度不同箔材作为铝硅镀层热成形钢激光焊的填充材料,并经热成形工艺处理. 通过比较焊接接头的微观组织、硬度分布、拉伸力学性能和断口形貌,阐明不同箔材填充激光焊的影响作用. 结果表明,Ni箔和Cu箔都促进了焊缝板条马氏体比例的增加和δ铁素体比例的减少,但Cu箔填充接头的断口呈沿晶断裂,塑性远低于Ni箔,与Ni固溶增强增韧Fe基体有关. Fe箔在一定程度上产生稀释的作用,也提高了焊缝板条马氏体含量.
    Abstract: Al-Si coated hot stamping steel is one of important advanced high strength steel in nowadays vehicle manufacturing. Due to the coating degradation effect, the performance of the laser weld of tailor-welded blanks is lower than that of base metal. This paper chose three different foils with same thickness as filler material to modify the welds. After hot stamping procedure in lab, the microstructure, hardness, tensile strength and fracture morphology are both compared to explain the foil effect. The results indicate Ni foil and Cu foil both reduce the delta ferrite in weld seam, but the joint with Cu foil shows intergranular fracture and low strength and ductility. Ni foil shows a limited increase of the joint strength, because of extra solution enhancement. Fe foil leads to dilution effect of Al coating, which increase martensite fraction.
  • 图  1   不同填充箔材铝硅镀层热成形钢激光焊接头横截面

    Figure  1.   Welded joints of Al-Si coated hot stamping steel with different foils before hot working. (a) no foil; (b) Fe foil; (c) Ni foil; (d) Cu foil

    图  2   热成形后不同填充箔材铝硅镀层热成形钢激光焊接头横截面

    Figure  2.   Weld joints of Al-Si coated hot stamping steel with different foils after hot working. (a) no foil; (b) Fe foil; (c) Ni foil; (d) Cu foil

    图  3   箔材对热成形后填充激光焊焊缝组织形貌的影响

    Figure  3.   Fusion zone microstructure of Al-Si coated hot stamping steel with different foils after hot working. (a) no foil; (b) Fe foil; (c) Ni foil; (d) Cu foil

    图  4   热成形后箔材填充激光焊接头的力学性能

    Figure  4.   Tensile stress-strain curves of welded joints of Al-Si coated hot stamping steel with different foils after hot working

    图  5   不同箔材填充激光焊接头拉伸断口形貌

    Figure  5.   Fractography of welded joints of Al-Si coated hot stamping steel with different foils after hot working. (a) no foil; (b) Fe foil; (c) Ni foil; (d) Cu foil

    图  6   不同箔材填充激光焊接头的硬度分布曲线

    Figure  6.   Micro hardness distribution of welded joints of Al-Si coated hot stamping steel with different foils after hot working

    表  1   试验所用的材料及箔材

    Table  1   Foils used in this experiment

    材料种类厚度d/μm主要元素
    (质量分数,%)
    密度
    ρ/(g∙cm−3)
    熔点
    T/℃
    22MnB5基材1 500Fe: 987.871 535
    Al-Si镀层20 ~ 30Al: 90, Si: 102.7660
    Fe箔48Fe: 99.97.871 535
    Ni箔52Ni: 99.98.91 455
    Cu箔54Cu: 99.98.961 083
    下载: 导出CSV

    表  2   热成形后箔材填充激光焊接头的力学性能

    Table  2   Tensile properties of welded joints after hot working using different foils

    箔材抗拉强度Rm/MPa断后伸长率 A(%)
    无填充1 239±741.32±0.18
    Fe箔1 349±341.51±0.17
    Ni箔1 355±541.77±0.21
    Cu箔909±400.68±0.04
    下载: 导出CSV
  • [1]

    Merklein Marion, Wieland Michael, Lechner Michael, et al. Hot stamping of boron steel sheets with tailored properties: A review.[J]. Journal of Materials Processing Technology, 2016, 228: 11 − 24. doi: 10.1016/j.jmatprotec.2015.09.023

    [2]

    Yang Hanwen, Sun Yiming, Tan Caiwang, et al. Influence of Al–Si coating on microstructure and mechanical properties of fiber laser welded and then press-hardened 22MnB5 steel.[J]. Materials Science & Engineering:A, 2020, 794: 139918. doi: 10.1016/j.msea.2020.139918

    [3] 吴彦骏, 张丹荣, 罗爱辉, 等. 激光拼焊Boron钢板热冲压性能研究[J]. 精密成形工程, 2013, 5(3): 59 − 64. doi: 10.3969/j.issn.1674-6457.2013.03.014

    Wu Yanjun, Zhang Danrong, Luo Aihui, et al. Study on characteristics of tailor welded boron sheet after hot stamping[J]. Journal of Netshape Forming Engineering, 2013, 5(3): 59 − 64. doi: 10.3969/j.issn.1674-6457.2013.03.014

    [4]

    Lin Wenhu, Li Fang, Wu Dongsheng, et al. Effect of Al-Si coating on weld microstructure and properties of 22MnB5 steel joints for hot stamping.[J]. Journal of Materials Engineering and Performance, 2018, 27(4): 1825 − 1836. doi: 10.1007/s11665-018-3259-0

    [5]

    Khan M S, Razmpoosh M H, Biro E, et al. A review on the laser welding of coated 22MnB5 press-hardened steel and its impact on the production of tailor-welded blanks.[J]. Science and Technology of Welding and Joining, 2020, 25(6): 447 − 467. doi: 10.1080/13621718.2020.1742472

    [6]

    Wang Qiongyan, Lin Wenhu, Li Fang, et al. Influence of thermal modification on Al-Si coating of hot-stamped 22MnB5 steel: microstructure, phase transformation, and mechanical properties[J]. Journal of Shanghai Jiaotong university (Science), 2021(6): 747 − 756.

    [7]

    Sun Jing, Han Zhenyu, Xu Feng, et al. The segregation control of coating element for pulse fiber laser welding of Al-Si coated 22MnB5 steel.[J]. Journal of Materials Processing Technology, 2020, 286: 116833. doi: 10.1016/j.jmatprotec.2020.116833

    [8]

    Lin Wenhu, Li Fang, Hua Xueming. Effect of keyhole mode on weld shape and mechanical properties of thin sheets of Al-Si coated 22MnB5 steel.[J]. Journal of Laser Applications, 2018, 30(4): 42001.1 − 42001.12.

    [9]

    Khan M S, Razmpoosh M H, Macwan A, et al. Optimizing weld morphology and mechanical properties of laser welded Al-Si coated 22MnB5 by surface application of colloidal graphite[J]. Journal of Materials Processing Technology, 2021, 293: 117093. doi: 10.1016/j.jmatprotec.2021.117093

    [10]

    Lin Wenhu, Li Fang, Hua Xueming, et al. Effect of filler wire on laser welded blanks of Al-Si-coated 22MnB5 steel.[J]. Journal of Materials Processing Technology, 2018, 259: 195 − 205. doi: 10.1016/j.jmatprotec.2018.04.041

    [11]

    Lee C W, Kim S Y, Jang S G, et al. Fusion zone microstructural evolution of Al-10% Si coated hot stamping steel during laser welding.[J]. ISIJ International, 2019, 59(1): 136 − 143. doi: 10.2355/isijinternational.ISIJINT-2018-489

    [12]

    Wang Xiaonan, Zhang Zhenghui, Hu Zengrong, et al. Effect of Ni foil thickness on the microstructure of fusion zone during PHS laser welding.[J]. Optics & Laser Technology, 2020, 125: 106014.

    [13]

    Chen Xiaming, Wang Xiaonan, Sun Qian, et al. Improving the mechanical properties of PHS laser welded joints by adding Ni foil to suppress δ-ferrite.[J]. Journal of Materials Research and Technology, 2020, 9(3): 5184 − 5193. doi: 10.1016/j.jmrt.2020.03.035

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出版历程
  • 收稿日期:  2022-02-21
  • 网络出版日期:  2023-05-09
  • 刊出日期:  2023-06-24

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