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LI Guowei, LIANG Yahong, CHEN Furong, HAN Yongquan. Welding parameters optimization and mechanical properties analysis of PVPPA welded high-strength aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(10): 86-92. DOI: 10.12073/j.hjxb.2019400268
Citation: LI Guowei, LIANG Yahong, CHEN Furong, HAN Yongquan. Welding parameters optimization and mechanical properties analysis of PVPPA welded high-strength aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(10): 86-92. DOI: 10.12073/j.hjxb.2019400268
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Welding parameters optimization and mechanical properties analysis of PVPPA welded high-strength aluminum alloy

  • 1.

    Inner Mongolia University of Technology, Hohhot 010051, China

  • 2.

    Inner Mongolia Key Laboratory of Light Metal Materials, Hohhot 010051, China

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  • Received Date: October 14, 2018
  • Available Online: July 12, 2020
    Graphical Abstract
    • Abstract
  • The welding process of 7075 aluminum alloy with a thickness of 10mm was carried out by PVPPAW. The influence of welding current and plasma gas flow rate on weld forming coefficient was studied. The optimum welding parameters were determined and the well-formed welds were obtained. The mechanical properties of the well-formed welded joints were analyzed. The results shown that the weld forming coefficient initially decreased and then increased with the increase of welding current. While the plasma gas flow rate increased, the weld forming coefficient gradually decreased. The better weld forming coefficient range is 1.1 ~ 1.3. Compared with the plasma gas flow rate, the welding current has greater influence on weld formation. The satisfying weld appearance can be achieved under the pulse welding current of 250 A/290 A, the plasma gas flow rate of 2.0 L/min. The welding quality is good under the optimum welding parameters, and the tensile strength of the weld reached 397.9 MPa, which is nearly 67.5% of that of the base metal. The weld area exhibited the dendrite microstructure.
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    • References (12)
  • 陈大军, 李忠盛, 戴明辉, 等. 7075超高强铝合金脉冲MIG焊接头组织与性能[J]. 精密成形工程, 2017, 9(6): 170 − 174. doi: 10.3969/j.issn.1674-6457.2017.06.029

    Chen Dajun, Li Zhongsheng, Dai Minghui, et al. Microstructure and properties of 7075 high strength Al-alloy pulsed MIG welding joints[J]. Journal of Netshape Forming Engineering, 2017, 9(6): 170 − 174. doi: 10.3969/j.issn.1674-6457.2017.06.029
    刘长军, 刘郑军, 阮祥钢, 等. 焊后热处理对AA7075铝合金DP-MIG焊接接头组织及力学性能的影响[J]. 焊接学报, 2016, 37(10): 81 − 84.

    Liu Changjun, Liu Zhengjun, Ruan Xianggang, et al. Effect of post-weld heat treatment on microstructure and mechanical properties of welded joint of 7075 aluminum alloy by double-pulsed metal inert-gas welding process[J]. Transactions of the China Welding Institution, 2016, 37(10): 81 − 84.
    Li Guowei, Chen Furong, Han Yongquan, et al. Improving mechanical properties of PVPPA welded joints of 7075 aluminum alloy by PWHT[J]. Materials, 2018, 11(3): 379. doi: 10.3390/ma11030379
    Liu Cheng, Northwood D O, Bhole S D. Tensile fracture behavior in CO2 laser beam welds of 7075-T6 aluminum alloy[J]. Material & Design, 2004, 25(7): 573 − 577.
    常丽艳, 宋西平, 李宏良, 等. 7075铝合金激光-MIG复合焊接接头组织及性能的分析[J]. 热加工工艺, 2014, 43(9): 25 − 28.

    Chang Liyan, Song Xiping, Li Hongliang, et al. Microstructure and mechanical properties of laser-MIG hybrid welded joint of 7075-T6 aluminum alloy[J]. Hot Working Technology, 2014, 43(9): 25 − 28.
    李　正. 7075-T6铝合金激光-MIG复合焊研究[D]. 合肥: 合肥工业大学, 2012.
    Li Dongxiao, Yang Xinqi, Cui Lei, et al. Investigation of stationary shoulder friction stir welding of aluminum alloy 7075-T651[J]. Journal of Materials Processing Technology, 2015, 222: 391 − 398. doi: 10.1016/j.jmatprotec.2015.03.036
    孙振邦, 韩永全, 张世全, 等. 铝合金LB-VPPA复合焊接热源模型[J]. 机械工程学报, 2016, 52(12): 46 − 51.

    Sun Zhenbang, Han Yongquan, Zhang Shiquan, et al. LB-VPPA hybrid welding heat source model for aluminum alloy[J]. Journal of Mechanical Engineering, 2016, 52(12): 46 − 51.
    Nunes A C, Bayless E O. Variable polarity plasma arc welding on space shuttle external tank[J]. Welding Journal, 1984, 63(4): 27 − 35.
    丁春辉, 刘长军. AA7075超硬铝合金双脉冲MIG焊-机械振动联合工艺优化[J]. 热加工工艺, 2018, 47(9): 216 − 218, 221.

    Ding Chunhui, Liu Changjun. Optimization of double-pulsed MIG welding and mechanical vibration combined process of 7075 super-hard aluminum alloy[J]. Hot Working Technology, 2018, 47(9): 216 − 218, 221.
    春 兰, 韩永全, 陈芙蓉, 等. 铝合金脉冲变极性等离子弧焊接工艺[J]. 焊接学报, 2016, 37(1): 29 − 32.

    Chun Lan, Han Yongquan, Chen Furong, et al. Pulse variable polarity plasma arc welding technology of aluminum alloy[J]. Transactions of the China Welding Institution, 2016, 37(1): 29 − 32.
    李国伟, 陈芙蓉, 韩永全, 等. 高强铝合金脉冲变极性等离子弧焊接头组织与性能[J]. 焊接学报, 2016, 37(11): 27 − 30.

    Li Guowei, Chen Furong, Han Yongquan, et al. Microstructure and mechanical properties of pulse VPPA welded high-strength aluminum alloy joints[J]. Transactions of the China Welding Institution, 2016, 37(11): 27 − 30.
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