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圆圈形运丝方式下温度影响MIG焊接头组织与断裂位置的规律

方喜风, 王新, 史学海, 姬书得, 梁志敏, 肖翰林

方喜风, 王新, 史学海, 姬书得, 梁志敏, 肖翰林. 圆圈形运丝方式下温度影响MIG焊接头组织与断裂位置的规律[J]. 焊接学报, 2016, 37(12): 37-40.
引用本文: 方喜风, 王新, 史学海, 姬书得, 梁志敏, 肖翰林. 圆圈形运丝方式下温度影响MIG焊接头组织与断裂位置的规律[J]. 焊接学报, 2016, 37(12): 37-40.
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FANG Xifeng, WANG Xin, SHI Xuehai, JI Shude, LIANG Zhimin, XIAO Hanlin. Effects of temperature on microstructure and fracture position of MIG welded joints using circled wire-feeding mode[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 37-40.
Citation: FANG Xifeng, WANG Xin, SHI Xuehai, JI Shude, LIANG Zhimin, XIAO Hanlin. Effects of temperature on microstructure and fracture position of MIG welded joints using circled wire-feeding mode[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 37-40.
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圆圈形运丝方式下温度影响MIG焊接头组织与断裂位置的规律

  • 1.

    南车青岛四方机车车辆股份有限公司, 青岛 266111

  • 2.

    沈阳航空航天大学 航空航天工程学部, 沈阳 110136

  • 3.

    河北科技大学 材料科学与工程学院, 石家庄 050018

基金项目: 国家自然科学基金资助项目（51204111）；航空科学基金资助项目（2013ZE54021，2014ZE54021）

Effects of temperature on microstructure and fracture position of MIG welded joints using circled wire-feeding mode

  • 1.

    CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., Qingdao 266111, China

  • 2.

    Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China

  • 3.

    School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

摘要

    摘要
  • 摘要: 以圆圈形运丝为研究对象，利用数值模拟与试验相结合的方法研究了在MIG焊接过程中的温度场分布规律，讨论了温度峰值影响接头显微组织及断裂位置的规律.结果表明，对于圆圈形摆动工艺来说，由于熔池区内左侧的材料经历了周期性的二次加热，导致焊缝左侧及热影响区材料经历的温度峰值均高于右侧；摆动工艺的熔池区温度峰值高于不摆动工艺.与直线运丝相比较，摆动焊焊道内的等轴晶较大，而相邻焊道界面处的柱状晶较小.不同工艺下拉伸试样的断裂位置与焊缝区经历的热循环密切相关.
    Abstract: Based on the circled wire-feeding mode, the temperature distribution during the MIG welding process was studied by numerical simulation and experimental investigation and the effect of the peak temperature on the microstructure and fracture position was discussed. Results showed that for the circled weaving welding process, the materials in the left side of the weld and thermo-affected zone experience higher peak temperature because the material in the left side of the molten pool underwent periodic reheating process. The temperature of the molten pool using the weaving welding process is higher than that of the linear welding process. Compared with linear wire-feeding mode, the equiaxed grains in the weld bead using the weaving welding process are larger, while the columnar grains at the interface of the adjacent weld bead are smaller. The fracture position of the tensile samples under these two processes is closely related to the heat cycle in the weld zone.
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    • 参考文献(11)
  • [1] 汪琼. 厚壁铝合金摆动电弧窄间隙MIG焊工艺技术研究[D]. 哈尔滨:哈尔滨工业大学. 2013.
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  • 收稿日期:  2014-11-29

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