US 11,679,453 B2 · Filler metal for TIG welding

Abstract

The present invention provide a filler metal for TIG welding capable of stable welding, of which heat flux feeding area is wider than conventional wire filler metal and heat input per unit length is increased. The filler metal for TIG welding which is continuously supplied on a base metal to be melted by an arc after forming the arc between the base metal and an electrode over the base metal and supplying shield gas around the arc, wherein the cross-section of the filler metal has curved shape of which surface facing the electrode is concavely curved to the electrode.

Claims6

Dependent claims

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,
f
⁡
(
r
)
=
f
⁡
(
0
)
⁢
e
-
(
r
2
2
⁢
σ
2
)
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.

24 more elements

Dependencies are inferred from the claim text.

Filler metal for TIG welding

Life of this patent

Filler metal for TIG welding

Life of this patent

Abstract

Claims6