Scholarlink

<p>This study explores the potential uses of external sinusoidal alternating longitudinal magnetic field (EMF)-assisted K-TIG welding for medium-thick plates. Our research commences with a comprehensive analysis of the distribution characteristics and dynamic variations of the EMF within the welding zone using ANSYS Electronics, and the mechanism of EMF on the K-TIG welding arc was also simulated using ANSYS Fluent. Subsequently, experiments were conducted employing a custom magnetic control power supply to weld Y-shaped groove Q345 under EMF at various frequencies. The results indicate that EMF-assisted K-TIG offers exceptionally high welding efficiency and quality. The mechanical properties of the welded joints exceed those of the base metal. A significant reduction in heat input and increased weld bead width under EMF was observed. At an optimal EMF frequency, the stirring effect on the weld pool was particularly evident, resulting in beneficial microstructure and a remarkable increase in impact toughness by up to 100%. Additionally, the magnetic field lines perpendicular to the Y-shaped groove surface reduced the strength of the EMF in the longitudinal direction and reduced the Lorentz force’s electromagnetic stirring effect, only leading to a 20 A decrease in penetration current; the reduction amplitude is lower than that without a Y-shaped groove (50 A). The results of this investigation provide critical theoretical foundations and practical guidelines for improving EMF-assisted K-TIG welding.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis of sine alternating longitudinal magnetic field frequency on Q345 K-TIG welding with a Y groove: formation, mechanical, and mechanism

  • 期刊论文

  • 发表日期：

    2025年2月17日

查看全文
  • Jiatong Zhan,
  • Xiongyue Ye,
  • Shaotao Zhong,
  • Zhizhong Liu,
  • Yonghua Shi

摘要

This study explores the potential uses of external sinusoidal alternating longitudinal magnetic field (EMF)-assisted K-TIG welding for medium-thick plates. Our research commences with a comprehensive analysis of the distribution characteristics and dynamic variations of the EMF within the welding zone using ANSYS Electronics, and the mechanism of EMF on the K-TIG welding arc was also simulated using ANSYS Fluent. Subsequently, experiments were conducted employing a custom magnetic control power supply to weld Y-shaped groove Q345 under EMF at various frequencies. The results indicate that EMF-assisted K-TIG offers exceptionally high welding efficiency and quality. The mechanical properties of the welded joints exceed those of the base metal. A significant reduction in heat input and increased weld bead width under EMF was observed. At an optimal EMF frequency, the stirring effect on the weld pool was particularly evident, resulting in beneficial microstructure and a remarkable increase in impact toughness by up to 100%. Additionally, the magnetic field lines perpendicular to the Y-shaped groove surface reduced the strength of the EMF in the longitudinal direction and reduced the Lorentz force’s electromagnetic stirring effect, only leading to a 20 A decrease in penetration current; the reduction amplitude is lower than that without a Y-shaped groove (50 A). The results of this investigation provide critical theoretical foundations and practical guidelines for improving EMF-assisted K-TIG welding.