钛合金快频脉冲柔性波形调制TIG焊接工艺

doi:10.3901/JME.2020.06.102

机械工程学报 ›› 2020, Vol. 56 ›› Issue (6): 102-109.doi: 10.3901/JME.2020.06.102

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钛合金快频脉冲柔性波形调制TIG焊接工艺

吴健文, 徐孟嘉, 范文艳, 陈浩宇, 江东航, 王振民

华南理工大学机械与汽车工程学院广州 510640

收稿日期:2019-09-27 修回日期:2020-01-17 出版日期:2020-03-20 发布日期:2020-05-12
作者简介:吴健文,男,1995年出生,博士研究生。主要从事高端智能焊割装备及机器人方面的科研工作。E-mail:515433207@qq.com;
王振民(通信作者),男,1974年出生,博士,教授,博士研究生导师。主要从事高端智能焊割装备及机器人方面的科研和教学工作。发表论文50余篇。E-mail:wangzhm@scut.edu.cn
基金资助:
国家自然科学基金（51875212）、广东省科技计划（2018A030313192，2019B090919002）和广州市国际合作（201807010035，2019070110006）资助项目。

Flexible Waveform Interpulse TIG Welding for Titanium Alloy

WU Jianwen, XU Mengjia, FAN Wenyan, CHEN Haoyu, JIANG Donghang, WANG Zhenmin

School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640

Received:2019-09-27 Revised:2020-01-17 Online:2020-03-20 Published:2020-05-12

摘要/Abstract

摘要： 基于自主研制的SiC MOSFET快频脉冲焊接电源系统，提出一种钛合金“快频脉冲柔性波形调制”TIG焊接技术。快频脉冲焊接电源采用SiC MOSFET作为逆变功率器件，大幅提高电源的逆变频率和动态响应特性，加强高频段电弧控制效果，实现了20 kHz规整快频脉冲柔性电流波形的稳定输出。将快频脉冲柔性波形调制TIG焊技术应用于钛合金TC4焊接过程，研究结果表明：与传统脉冲TIG焊对比，快频脉冲柔性波形TIG电弧收缩效果明显，电弧径向尺寸显著减小；快频脉冲柔性波形调制TIG焊技术具有显著的细化焊缝晶粒和减少热影响区粗化的效果，钛合金焊缝晶粒尺寸减小了约71%。

关键词: 快频脉冲焊接, 焊接波形控制, 钛合金, SiC MOSFET

Abstract: Based on the self-developed SiC MOSFET interpulse welding power supply system, a novel flexible waveform interpulse welding technology is proposed. The SiC MOSFET is used as the inverter power device, which improves the inverter frequency and the dynamic response of the power supply. The interpulse welding power supply enhances the control effect of high-frequency arc to reach high stability in output of the regular and flexible current waveform of the interpulse at 20 kHz. The method is applied to the welding of titanium alloy TC4. Compared with the conventional pulsed TIG, the arc radial dimension of the interpulse TIG is reduced, and the grains in the fusion zone and HAZ of the weld are significantly refined. The average grain size in the fusion zone is decreased by 71%.

Key words: interpulse welding, welding waveform control, titanium alloy, SiC MOSFET

中图分类号:

TG439

吴健文, 徐孟嘉, 范文艳, 陈浩宇, 江东航, 王振民. 钛合金快频脉冲柔性波形调制TIG焊接工艺[J]. 机械工程学报, 2020, 56(6): 102-109.

WU Jianwen, XU Mengjia, FAN Wenyan, CHEN Haoyu, JIANG Donghang, WANG Zhenmin. Flexible Waveform Interpulse TIG Welding for Titanium Alloy[J]. Journal of Mechanical Engineering, 2020, 56(6): 102-109.

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钛合金快频脉冲柔性波形调制TIG焊接工艺

Flexible Waveform Interpulse TIG Welding for Titanium Alloy

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