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Magnetic
arc control directs and shapes the arc, controlling heat distribution
and penetration between the segments being joined to yield consistent,
uniform welds. |
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| Arc blow or wander causes misplaced
bead and lack of penetration. |
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| Large gap causes
excessive drop-through and root-side undercut. |
Uniform penetration
achieved with magnetic arc control. |
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Magnetic
arc control sweeps the arc back and forth across the weld line,
directing the required amount of heat to the weld edges, and
both widening and flattening the head. |
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| Sharp crevices
in butt weld |
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| Flat fillet
with sharp crevices on both members. |
Minimized undercutting with
magnetic arc control. |
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In multi-pass groove joints, magnetic arc control
oscillates the arc in the groove, directing the heat to the
desired position for uniform sidewall fusion. |
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| Lack of fusion
in V and U-grooves. |
Uniform sidewall fusion
achieved with magnetic arc control. |
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Magnetic arc control stirs
the arc, helping to eliminate bubbles and porosity in the weld. |
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| Typical porosity
caused by gases generated in melted base metal. |
Sound welds
achieved with magnetic arc control. |
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With magnetic arc control,
you can specify the proportion of time the arc spends on either
side of the weld seam. When joining members of different cross
sections, magnetic arc control makes it easy to place the arc
exactly where it is needed – penetrating the thick wall
adequately while preventing undercutting on the thin wall. |
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| Insufficient
heat on thick member prevents proper penetration and fusion
to thin member. |
Uniform penetration on thick
and thin members, no undercutting with magnetic arc control. |
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