Controlled composition welding method
AssigneeElectric Power Research Institute, Inc.
InventorsDavid Wayne Gandy, James William Hales, William Frederick Newell, Jr., Roger Allen Swain, James Franklin Turner, Ramaswamy Viswanathan
Life of this patent
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Abstract
This invention relates to a method and apparatus for controlling the composition of a weld. More particularly it relates to welding using an electric circuit, thereby creating a weld puddle, and adding at least one filler that is electrically independent from the electric circuit to the weld puddle at a controllable rate to obtain a target weld composition. The filler can be added to the extent limited by practical weld puddle geometry and, thus, the method and apparatus also facilitate increased weld deposition rates.
Claims11
A method for welding, comprising:
- welding a workpiece using an electric circuit and a consumable electrode, thereby creating an electrical arc and a weld puddle;
- providing a flux material to cover said electrical arc;
- adding at least one non-electrically connected filler to said weld puddle at a controllable rate to obtain a target weld composition for a weld;
- and
- varying said controllable rate during said welding to obtain a second target weld composition within said weld.
A method for welding, comprising:
- welding a workpiece using an electric circuit and a consumable electrode, thereby creating an electrical arc and a weld puddle;
- providing a flux material to cover said electrical arc;
- adding at least one non-electrically connected filler to said weld puddle at a first controllable rate to obtain a target weld composition for a weld;
- and
- adding a second non-electrically connected filler to said weld puddle, wherein said second non-electrically connected filler is added at a second controllable rate.
A method for welding, comprising:
- welding a workpiece using an electric circuit and a consumable electrode, thereby creating an electrical arc and a weld puddle, thereby creating a weld region;
- providing a flux material to cover said electrical arc;
- and
- adding at least one non-electrically connected filler to said weld puddle at a first location within said weld region at a first controllable rate to obtain a target weld composition;
- and adding at least one additional non-electrically connected filler material at a second location within said weld region at a second controllable rate to obtain a second target weld composition.
A method for welding comprising:
- welding a workpiece using an electric circuit and a consumable electrode, thereby creating an electrical arc and a weld puddle;
- adding said consumable electrode at a primary controllable rate;
- providing a flux material to cover said electrical arc;
- adding at least one non-electrically connected filler to said weld puddle at a controllable rate to obtain a target weld composition for a weld;
- and
- varying said primary controllable rate during said welding.
A method for controlling the composition of a weld, comprising:
- causing an arc between a primary electrode and a workpiece to be welded, thereby creating a weld puddle;
- maintaining said weld puddle with heat created by said arc;
- providing a flux material to cover said arc;
- adding at least one non-electrically connected filler to said weld puddle at a controllable rate to obtain a target weld composition;
- and
- varying said controllable rate during said adding.
A method for controlling the composition of a weld, comprising:
- causing an arc between a primary electrode and a workpiece to be welded, thereby creating a weld puddle;
- maintaining said weld puddle with heat created by said arc;
- providing a flux material to cover said arc;
- adding at least one non-electrically connected filler to said weld puddle at a first controllable rate to obtain a target weld composition;
- and
- adding a second non-electrically connected filler to said weld puddle, wherein said second non-electrically connected filler is added at a second controllable rate.
A method for controlling the composition of a weld, comprising:
- causing an arc between a primary electrode and a workpiece to be welded, thereby creating a weld puddle;
- maintaining said weld puddle with heat created by said arc;
- adding said primary electrode at a primary controllable rate;
- providing a flux material to cover said arc;
- and
- adding at least one non-electrically connected filler to said weld puddle at a controllable rate to obtain a target weld composition;
- and
- varying said primary controllable rate during said causing.
Dependencies are inferred from the claim text.