초록 ▼

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 (

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.

대표청구항 ▼

1. 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; andthe electrode comprising a sheath encapsulating a core having a core composition, the core composition comprising a combination o

1. 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; andthe 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.2. The welding apparatus of claim 1, further comprising a gas source for supplying a shielding gas to the welding apparatus.3. The welding apparatus of claim 1, wherein the welding process is gas metal arc welding.4. The welding apparatus of claim 1, wherein the means for feeding the electrode into the welding gun comprise a wire drive and a wire reel.5. The welding apparatus of claim 1, wherein one or more compounds of potassium comprise K2MnTiO4and K2SO4.6. The welding apparatus of claim 5, wherein the combination is selected from the range from about 0.3% to about 5.0%.7. The welding apparatus of claim 2, wherein the shielding gas comprises a mixture of Ar and CO2.8. 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; andsupplying the shielding gas into the welding apparatus to shield the electrode and the arc.9. The welding process of claim 8, wherein supplying the shielding gas into the welding apparatus comprises providing an external gas source.10. The welding process of claim 8, wherein feeding the electrode into the welding apparatus comprises providing means for feeding the electrode that is external to the welding apparatus.11. The welding process of claim 8, wherein supplying the shielding gas comprises providing a mixture of Ar and CO2.12. The welding process of claim 8, wherein the welding process is a gas metal arc welding process.13. The welding process of claim 8, wherein one or more compounds of potassium comprise K2MnTiO4and K2SO4.14. The welding process of claim 13, wherein the combination is selected from the range from about 0.3% to about 5.0%.