Welding electrode
AssigneeInco Alloys International, Inc.
InventorsLewis E. Shoemaker, Thomas O. Bates
Life of this patent
Estimating the term…
Abstract
A consumable electrode including a core wire and a coating adapted for welding clad steel products. The resulting weld deposit overcomes the problem of iron dilution which tends to degrade the weld when available electrodes are utilized. Such clad products are often exposed to sulfur and acidified chloride environments.
Claims6
A consumable electrode for welding a 625 alloy clad steel workpiece, the electrode including a core wire and a coating, the core wire consisting essentially of about 20% to about 23% chromium, about 8% to about 10% molybdenum, up to about 5% iron, up to about 1% cobalt, up to about 0.5% silicon, up to about 0.4% aluminum, up to about 0.4% titanium, about 3% to about 4% columbium plus tantalum, the balance nickel and trace impurities, and the coating consisting essentially of about 10% to about 40% calcium carbonate, about 10% to about 35% cryolite, about 10% to about 30% titanium dioxide, up to about 10% magnetite, about 6% to about 12% molybdenum, up to about 7% nickel-columbium, up to about 10% chromium, up to about 15% nepheline syenite, up to about 5% zirconium oxide, up to about 5% periclase, up to about 5% extrusion aids, and a binder.
A weld deposit affixed to a nickel-chromium-molybdenum alloy clad steel article, the weld deposit consisting essentially of about 20% to about 23% chromium, about 11% to about 13% molybdenum, up to about 4.2% columbium plus tantalum, up to about 1% manganese, up to about 7% iron, up to about 0.8% silicon, up to about 0.5% copper, the balance nickel and trace elements.
A steel workpiece cladded with a nickel-base alloy including a welded deposit affixed to the cladding, the cladding consisting essentially of about 20% to about 23% chromium, about 3% to about 4% columbium plus titanium, about 8% to about 10% molybdenum, up to about 5% iron, up to about 0.5% manganese, up to about 0.4% aluminum, up to about 0.4% titanium, up to about 0.5% silicon, up to about 1% cobalt, the balance nickel and trace elements and the welded deposit consisting essentially of about 20% to about 23% chromium, about 11% to about 13% molybdenum, up to about 4.2% columbium plus tantalum, up to about 1% manganese, up to about 7% iron, up to about 0.8% silicon, up to about 0.5% copper, the balance nickel and trace elements.
Dependencies are inferred from the claim text.