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SAF2507超级双相不锈钢CMT+P熔滴过渡特性

黄瀚川, 徐连勇, 荆洪阳, 吕小青

黄瀚川, 徐连勇, 荆洪阳, 吕小青. SAF2507超级双相不锈钢CMT+P熔滴过渡特性[J]. 焊接学报, 2019, 40(10): 127-136. DOI: 10.12073/j.hjxb.2019400274
引用本文: 黄瀚川, 徐连勇, 荆洪阳, 吕小青. SAF2507超级双相不锈钢CMT+P熔滴过渡特性[J]. 焊接学报, 2019, 40(10): 127-136. DOI: 10.12073/j.hjxb.2019400274
HUANG Hanchuan, XU Lianyong, JIN Hongyang, LV Xiaoqing. Study on droplet transfer of CMT + P welding process in SAF2507 super duplex stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(10): 127-136. DOI: 10.12073/j.hjxb.2019400274
Citation: HUANG Hanchuan, XU Lianyong, JIN Hongyang, LV Xiaoqing. Study on droplet transfer of CMT + P welding process in SAF2507 super duplex stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(10): 127-136. DOI: 10.12073/j.hjxb.2019400274

SAF2507超级双相不锈钢CMT+P熔滴过渡特性

详细信息
    作者简介:

    黄瀚川,男,1992年出生,硕士研究生. 主要从事焊接工艺及焊接设备控制相关研究工作. Email:1873474176@qq.com

    通讯作者:

    徐连勇,男,教授. Email:xulianyong@tju.edu.cn

Study on droplet transfer of CMT + P welding process in SAF2507 super duplex stainless steel

  • 摘要: 采用焊接电信号采集系统与高速摄像系统对SAF2507超级双相不锈钢CMT + P(冷金属过渡 + 脉冲)熔滴过渡过程进行观测研究. 分析了CMT与CMT + P过程在不同送丝速度WFS下的熔滴过渡行为、波形变化机理与能量输入特征,揭示了CMT + P熔滴过渡特性. 结果表明:CMT + P实际波形图与理论上有多处不同;熔滴形状与尺寸、过渡形式、熔池的波动状态、焊丝端部到工件的距离及飞溅等都能影响电压的波动,电压波形图可以用来指导分析熔滴过渡行为;脉冲阶段对热输入起主要影响作用,调节脉冲峰值电流、脉冲基值电流、脉冲个数,可实现热输入的控制.
    Abstract: In this paper, the high-speed camera and welding electrical signal collection system were applied to observe the metal transfer of CMT + P welding process in SAF2507 Super Duplex Stainless Steel. The metal transfer behaviors, change of waveforms and heat input characteristics with different WFS of CMT and CMT + P were analyzed. The droplet transfer characteristics were revealed. The results show that there are many differences between the actual waveforms and the theoretical waveforms. The shape and size of the droplet, transfer form, the wave state of molten pool, the distance from the wire tip to the workpiece and the spatter can all affect the fluctuation of the voltage. The voltage waveform diagram can be used to guide the analysis of the metal transfer behaviors. The pulse period plays a major role in heat input, and the control of heat input can be realized by adjusting pulse peak current, pulse base current and the number of pulses.
  • 图  1   试验设备组成原理图

    Figure  1.   Schematic of the experimental set-up

    图  2   典型的CMT + P焊接过程原理图

    Figure  2.   Schematic of a typical CMT + P welding process

    图  3   CMT的实际波形图

    Figure  3.   Actual waveforms of CMT

    图  4   CMT的熔滴过渡行为

    Figure  4.   Metal transfer behaviors of CMT

    图  5   CMT + P的波形图与熔滴过渡行为

    Figure  5.   Waveforms and metal transfer behaviors

    图  6   CMT + P的波形图与熔滴过渡行为

    Figure  6.   Waveforms and metal transfer behaviors

    图  7   CMT + P的实际波形图

    Figure  7.   Actual waveforms of CMT + P(WFS = 5 m/min)

    图  8   CMT + P脉冲阶段的熔滴过渡行为

    Figure  8.   Metal transfer behaviors of CMT + P

    图  9   不同送丝速度下的CMT焊缝横截面

    Figure  9.   CMT cross-sections of weld beads with different WFS

    图  11   焊缝横截面示意图

    Figure  11.   Schematic of weld bead

    图  10   不同送丝速度下的CMT+P焊缝横截面

    Figure  10.   CMT+P cross-sections of weld beads with different WFS

    图  12   焊缝横截面尺寸

    Figure  12.   Dimensions of the cross-sections of weld beads

    表  1   焊接参数

    Table  1   Welding parameters for each sample

    编号焊接方法送丝速度WFS/(m·min–1)焊接速度v/(mm·s–1)
    1CMT35
    2CMT45
    3CMT55
    4CMT65
    5CMT + P35
    6CMT + P45
    7CMT + P55
    8CMT + P65
    9CMT + P75
    10CMT + P85
    下载: 导出CSV

    表  2   不同送丝速度WFS的热输入

    Table  2   Heat input with different WFS

    送丝速度
    WFS/(m·min–1)
    焊接方法脉冲个数
    n1
    CMT个数
    n
    热输入
    Q/(J·mm–1)
    3CMT + P51327.36
    4CMT + P61454.24
    5CMT + P81576.37
    6CMT + P91716.83
    7CMT + P151889.96
    8CMT + P3611 130.76
    下载: 导出CSV

    表  3   焊缝尺寸详细信息

    Table  3   Detailed dimensional information

    编号接触角θ/(°)熔深h/mm熔宽D/mm
    1940.483.20
    21000.604.26
    31081.056.24
    41141.767.40
    51131.164.93
    61151.606.13
    71181.986.85
    81201.918.39
    91241.9110.18
    101222.359.24
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-04-08
  • 网络出版日期:  2020-07-12
  • 刊出日期:  2019-09-30

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