Straight polarity metal cored wire
AssigneeHobart Brothers Company
InventorsAnthony Nikodym, Steven Barhorst
Life of this patent
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Abstract
A core composition of a metal-cored wire comprising a combination of graphite and potassium compounds has been proven to stabilize the arc in a straight polarity welding configuration. In particular, adding a combination of graphite and potassium manganese titanate (K2MnTiO4) and potassium sulfate (K2SO4) in the preferred combination of graphite and potassium compounds from the range of about 0.3% to about 5.0% wt resulted in a greatly stabilized arc, reduced spatter and reduced warpage while maintaining high deposition rates of the DCEN welding process.
Claims14
A welding apparatus for a welding process in a straight polarity configuration comprising:
- a welding gun having means for feeding an electrode into the welding gun;
- and
- the electrode comprising a sheath encapsulating a core having a core composition, the core composition comprising a combination of graphite and one or more compounds of potassium, the combination of graphite and compounds of potassium in the core composition not exceeding approximately 5% by weight, wherein the welding apparatus is adapted to couple to a power source of direct electrical current in a straight polarity (DCEN) configuration.
A welding process in a straight polarity configuration comprising:
- providing a welding apparatus having means for feeding an electrode into the welding apparatus and means for supplying a shielding gas into the welding apparatus;
- coupling the welding apparatus to a power source of direct electrical current in the straight polarity configuration (DCEN) and forming an arc;
- feeding the electrode into the welding apparatus, the electrode comprising a sheath and a core having a core composition, the core composition comprising a combination of graphite and one or more compounds of potassium, the combination of graphite and compounds of potassium in the core composition not exceeding approximately 5% by weight;
- and
- supplying the shielding gas into the welding apparatus to shield the electrode and the arc.
Dependencies are inferred from the claim text.