Electric heating – Metal heating – Weld rod composition
Reexamination Certificate
2006-08-08
2006-08-08
Elve, M. Alexandra (Department: 1725)
Electric heating
Metal heating
Weld rod composition
C219S146310, C219S146510
Reexamination Certificate
active
07087860
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
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ITW Hobart Brothers New Products News, Jan. 2001, 3 pgs.
Agusa, K., et al., “MIG welding with pure argon shielding-arc stabilisation by rare earth additions to electrode wires”, Metal Construction, Sep., 1981, pp. 570-574.
Dilthey, Prof. Dr.-Ing Ulrich, et al., “Metal-arc active gas welding in the high power range with flux-cored wire electrodes”, Welding & Cutting, Mar., 1996, pp. E47-E49.
Lenivkin, V.A., et al., “Increasing the Arc Stability in Consumable Electrode Welding with Straight Polarity Current in Shielding Gases”, Svarochnoe Proizvodstvo, 1981, No. 12, pp. 28-30.
Varukha, E.N., et al., “Conditions of formation of spray transfer of metal in welding with straight polarity current”, Svarochnoe Proizvodstvo 1986, 33 (d) 39-41.
Cooperative Research Program, Summary Report SR9907, “Variable Polarity Gas Metal Arc Welding”, Jul., 1999, 4 pages.
Barhorst Steven
Nikodym Anthony
Elve M. Alexandra
Hobart Brothers Company
Houston Eliseeva LLP
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