As an arc voltage decreases, an arc length shortens and a surface of molten pool right under the arc becomes dented at a high current range in gas metal arc welding (GMAW) using 100% CO2 as a shielding gas and a carbon steel solid wire. And the arc is finally generated at a lower position under the surface of the molten pool and in a space formed by a wall of molten pool. A spatter generation level is extremely low even at a high current range in this metal transfer mode. This arc phenomenon is referred to as “buried arc,” and the arc stabilization technique at the high current buried arc more than 450A is described in this report.
Welding in the World – Springer Journals
Published: Apr 6, 2017
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