Aluminum-containing welding electrode
AssigneeLincoln Global, Inc.
InventorsShenjia Zhang, John Benjamin Schaeffer, Badri K. Narayanan
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Abstract
The disclosed technology generally relates to consumable electrode wires and more particularly to consumable electrode wires having a core-shell structure, where the core comprises aluminum. In one aspect, a welding wire comprises a sheath having a steel composition and a core surrounded by the sheath. The core comprises aluminum (Al) at a concentration between about 3 weight % and about 20 weight % on the basis of the total weight of the welding wire, where Al is in an elemental form or is alloyed with a different metal element. The disclosed technology also relates to welding methods and systems adapted for using the aluminum-comprising electrode wires.
Claims20
A welding wire configured to serve as a source of weld metal during flux-cored arc welding (FCAW), the welding wire comprising:
- a sheath having a steel composition;
- and
- a core surrounded by the sheath, the core comprising:
- aluminum (Al) at a concentration between about 3 weight % and about 20 weight % on the basis of the total weight of the welding wire,
- wherein Al is in an elemental form or is alloyed with a different metal element.
A welding wire configured to serve as a source of weld metal during flux-cored arc welding, the welding wire comprising a core surrounded by a sheath and a composition such that a weld bead formed using the welding wire has iron (Fe) at concentration between about 50 weight % and about 85 weight % and aluminum (Al) at a concentration between about 3 weight % and about 20 weight %.
A method of flux-cored arc welding (FCAW), the method comprising:
- providing a welding wire configured to serve as a source of weld metal during welding, the welding wire comprising:
- a sheath having a steel composition, and
- a core surrounded by the sheath, the core comprising aluminum (Al) at a concentration between about 3 weight % and about 20 weight % on the basis of the total weight of the welding wire,
- wherein Al in an elemental form or is alloyed with a different metal element;
- applying an energy sufficient to produce a steady stream of droplets of molten welding wire;
- and
- depositing the molten droplets onto a workpiece.
The method of claim 20, wherein the welding wire further comprises manganese (Mn) at a concentration between about 10 weight % and about 60 weight % on the basis of the total weight of the welding wire, wherein Mn is in an elemental form or is alloyed with a different metal element.
Dependencies are inferred from the claim text.