Method for reducing reactivity of ferroalloys used in fabricating coated stick welding electrodes
AssigneeLincoln Global, Inc.
InventorsKevin Butler, David Fedor
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Abstract
Methods are presented for reducing reactivity of ferroalloys used in the manufacture of stick welding electrodes with ferroalloy coatings, in which surface metal silicon of ferroalloy powder is stabilized by dissolving or prereacting the surface silicon or silicon dioxide to provide stabilized ferroalloy powder with decreased surface reactivity to caustic silicate solutions that can be mixed with silicate solution to form a slurry for coating precut welding rods.
Claims23
A method for manufacturing coated stick welding electrodes, said method comprising:
- providing a ferroalloy powder that includes surface metal silicon;
- stabilizing said powder to produce stabilized powder with decreased surface reactivity to caustic silicate solutions;
- mixing said stabilized powder with a silicate binder solution to form a slurry;
- and
- extruding a precut metal alloy welding rod with said slurry to produce a coated stick welding electrode.
A method for reducing reactivity of ferroalloys for use in manufacturing coated stick welding electrodes, said method comprising:
- providing a ferroalloy powder having grains with surface silicon or surface silicon dioxide;
- and
- dissolving said surface silicon or surface silicon dioxide to produce a stabilized powder with decreased surface reactivity to caustic silicate solutions.
A method for reducing reactivity of ferroalloys for use in manufacturing coated stick welding electrodes, said method comprising:
- providing a ferroalloy powder having grains with surface silicon or surface silicon dioxide;
- reacting said surface silicon or surface silicon dioxide to produce a stabilized powder with decreased surface reactivity to caustic silicate solutions.
Dependencies are inferred from the claim text.