Eutectic Corporation

Paul A Kammer

George Yurasko, Jr

Edward R Gamberg

George J Durmann

Karel Zmrzlik

A nickel-base welding electrode is provided comprising a nickel core and a metallic powder-laden flux coating bonded thereto, the total composition of the electrode comprising about 40% to 50% by weight of the nickel core and about 60% to 50% by weight of the coating. The coating contains as fluxes about 18% to 30% titanium dioxide, about 8% to 16% calcium fluoride, about 1% to 3% iron carbonate, about 1.5% to 4% calcium carbonate, about 2% to 6% calcium-magnesium carbonate, and contains as the powdered metals about 20% to 30% chromium, about 3% to 8% manganese, about 1% to 4% molybdenum, about 1% to 5% niobium, about 8% to 18% iron, 0% to about 6% nickel, up to 1% graphite, and as extrusion aids about 1% to 4% clay and about 1% to 5% organic extrusion aid material. The flux in the coating is mixed with a bonding agent at a ratio of dry flux to bonding agent of about 5:1 to 10:1, the composition of the bonding agent being about 2% to 10% potassium carbonate, about 40% to 70% potassium silicate, about 1% to 6% potassium hydroxide, about 20% to 35% sodium silicate and 0 to about 15% water. The composition relationship of the metal powder in the flux to the nickel core is such as to provide a weld deposit, taking into account metal losses due to oxidation, containing less than about 0.25% C, about 10% to 20% chromium, about 5% to 12% iron, about 0.5% to 2.5% niobium, up to about 1% silicon, about 2% to 5% manganese, up to about 5% molybdenum and the balance essentially nickel.

Nickel-base welding electrode

A free-flowing self-bondable flame spray powder derived from an atomized alloy powder is provided in which the particles are characterized by aspherical shapes and have an average particle size within the range of about plus 400 mesh to minus 100 mesh. The aspherically shaped powder is further characterized by an specific surface of about 180 cm.sup.2 /gr and higher and has a composition consisting essentially of a solvent metal alloy selected from the iron-group base alloys consisting of nickel-base, iron-base, and cobalt-base alloys containing by weight about 5% to 35% chromium, the solvent metal alloy having a negative free energy of oxidation ranging up to about 80,000 calories per gram atom of oxygen referred to 25.degree. C. and containing about 5% to 15% by weight of a highly oxidizable solute metal whose negative free energy of oxidation is at least about 100,000 calories per gram atom of oxygen referred to 25.degree. C.

Flame spray powder

A free-flowing self-bondable flame spray powder derived from an atomized alloy powder is provided in which the particles are characterized by aspherical shapes and have an average particle size within the range of about plus 400 mesh to minus 100 mesh. The aspherically shaped powder is further characterized by a specific surface of about 180 cm.sup.2 /gr and higher and has a composition consisting essentially of a solvent metal of melting point in excess of about 1100.degree. C. whose negative free energy of oxidation ranges up to about 80,000 calories per gram atom of oxygen referred to 25.degree. C. The solvent metal contains at least one highly oxidizable solute metal in an amount of at least about 3% by weight, the oxidizable metal having a negative free energy of oxidation of at least about 100,000 calories per gram atom of oxygen referred to 25.degree. C.

Growing community of inventors

Cold Spring Harbor, NY, United States of America

Paul A Kammer