CPC B23K 35/0277 (2013.01) [B23K 9/167 (2013.01); B23K 35/02 (2013.01)] | 6 Claims |
1. A filler metal for Tungsten Inert Gas (TIG) welding,
of which a cross-section of the filler metal has a concavely curved shape,
wherein a concavely curved surface of the filler metal is determined by a curve connecting normal lines to plasma streamlines,
a shape f(r) of the plasma streamlines is defined by a following equation,
where, r is a distance along a radius direction when an electrode is assumed to a center, f(0) is a vertical distance from the electrode to a base metal, and σ means variance, a value of the σ is selected in accordance with the distance along the radius direction,
wherein one normal line to the plasma streamlines is obtained at a cross point with the normal lines of an adjacent plasma streamlines.
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