Journal
WELDING IN THE WORLD
Volume 65, Issue 1, Pages 95-104Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s40194-020-01000-3
Keywords
High-frequency magnetic field; Magnetic confinement; Arc plasma; TIG
Categories
Funding
- Project of the National Natural Science Foundation of China [51575362, 51275314]
- Shenyang `Shuangbai' Project [Z17-5-70]
- High-level Leading Talent Introduction Program of GDAS [2016GDASRC-0106]
- Ministry of Education and Science of Russian Federation [11.9505.2017/8.9]
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The study analyzes the effect of high-frequency axial magnetic field on TIG welding, with experimental results showing that the welding performance is optimized at a magnetic frequency of 1500 Hz, resulting in maximum depth-width ratio of the weld bead.
The effect of high-frequency axial magnetic field (HFAMF) on the shape of the welding arc and welding formation of tungsten inert gas (TIG) welding is analyzed theoretically and experimentally. The 316L stainless steel plate was welded with HFAMF produced by the excitation coil installed on the welding torch. The influence of the HFAMF on the welding process is studied by changing the magnetic frequency from 0 to 2000 Hz. The experimental results show that when the magnetic field frequency reaches 1500 Hz, the arc rotation radius is decreased to the minimum; the arc shape changes from cone to compressed cylinder; and the arc temperature, the arc pressure, and the depth-width ratio of the weld beam reached the maximum. Otherwise, the effect of applied HFAMF on the stress of arc and weld pool is discussed, and the mechanism of arc contraction is analyzed.
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