Systems and methods for multi-wire submerged arc welding using a flux-cored wire electrode
AssigneeLincoln Global, Inc.
InventorsStephan STARCK, Michele SCAPPIN, Michel JANY
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Abstract
Systems for multi-wire submerged arc welding including a flux-cored wire electrode comprising an internal flux, the internal flux comprising about 5% to about 70% of a carbonate compound and less than 25% of calcium fluoride (CaF2) by weight of the flux; an external flux for submerged arc welding, are provided such that, after a submerged arc welding process, the systems provide a weld metal comprising nitrogen in an amount of less than 100 ppm. Methods of performing multi-wire submerged arc welding using a flux-cored electrode and an external flux are also described.
Claims20
A system for multi-wire submerged arc welding comprising:
- a flux-cored wire electrode comprising an internal flux, the internal flux comprising about 5% to about 70% of a carbonate compound and less than 25% of calcium fluoride (CaF2) by weight of the internal flux;
- an external flux for submerged arc welding,
- wherein, after a submerged arc welding process, the system provides a weld metal comprising nitrogen in an amount of less than 100 ppm.
A multi-wire submerged arc welding method comprising:
- providing a flux-cored wire electrode having an internal flux comprising about 5% to about 70% of a carbonate compound and less than 25% of calcium fluoride (CaF2) by weight of the flux;
- providing an external flux for submerged arc welding, and
- performing submerged arc welding using the flux-cored wire electrode and the external flux to give a weld metal comprising nitrogen in an amount of less than 100 ppm.
Dependencies are inferred from the claim text.