Tubular welding electrode
AssigneeThe Lincoln Electric Company
InventorMario A. Amata
Life of this patent
Estimating the term…
Abstract
A formulation for the flux in a cored-type electric arc welding electrode which produces high impact value welds while welding vertically up or overhead and at greater melt-off rates than heretofore. The major flux ingredients are lithium oxide, iron oxide, silicon dioxide, lithium carbonate, magnesium and aluminum metal powders, all in a carefully balanced formula to give excellent operator appeal and excellent slag removal.
Claims14
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium oxide (LiO.sub.2):
- 1.8-3.2%
- One or more amphoteric oxides selected from the class consisting of Fe.sub.x O.sub.y and Mn.sub.x O.sub.y :
- 6.0-23%
- Aluminum:
- 2.5-5.0%
- Magnesium:
- 0.2-2.2%
- the lithium oxide being present in a sintered composite with the amphoteric oxide(s) in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 5.27-5.96%
- Magnesium/aluminum powder (MgAl):
- 2.85-3.23%
- Aluminum powder (Al):
- 2.14-2.43%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 0.43-0.49%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2 Fe.sub.x.O.sub.y):
- 5.27-5.96%
- Lithium manganate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2.Mn.sub.x O.sub.y):
- 1.90-2.15%
- Lithium titanate (Li.sub.2 O.TiO.sub.2):
- 0.57-0.65%
- Lithium fluoride (LiF):
- 0.57-0.65%
- the lithium oxide being present in a sintered composite with the iron and manganese oxides in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight):
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 5.41-6.13%
- Magnesium/aluminum powder (MgAl):
- 2.92-3.31%
- Aluminum powder (Al):
- 1.92-2.17%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 0.45-0.52%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2.Fe.sub.x O.sub.y):
- 5.41-6.13%
- Lithium manganate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2.Mn.sub.x O.sub.y):
- 1.95-2.21%
- Aluminum zirconium powder (Al.Zr):
- 0.22-0.26%
- Lithium titanate (Li.sub.2 O.TiO.sub.2):
- 0.28-0.32%
- Sodium titanate (Na.sub.2 O.4TiO.sub.2):
- 0.28-0.32%
- Lithium fluoride (LiF):
- 0.11-0.13%
- the lithium oxide being present in a sintered composite with the iron and manganese oxides in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 4.20-4.75%
- Magnesium/aluminum powder (MgAl):
- 2.91-3.29%
- Aluminum powder (Al):
- 2.00-2.26%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 1.35-1.53%
- Barium carbonate:
- 0.59-0.67%
- Foundry Ferro-titanium powder (Fe.Ti):
- 0.38-0.43%
- Magnesite (MgO):
- 0.38-0.43%
- Potassium fluosilicate (K.sub.2 SiF.sub.6):
- 0.057-0.064%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2.Fe.sub.x O.sub.y):
- 7.14-8.08%
- the lithium oxide being present in a sintered composite with the iron oxides in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 3.17-3.59%
- Magnesium aluminum powder (MgAl):
- 2.91-3.29%
- Aluminum powder (Al):
- 1.90-2.15%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 1.35-1.53%
- Barium carbonate:
- 0.48-0.54%
- Foundry Ferro-titanium powder (Fe.Ti):
- 0.38-0.53%
- Magnesite (MgO):
- 0.38-0.53%
- Potassium fluosilicate (K.sub.2 SiF.sub.6):
- 0.095-0.108%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 O.SiO.sub.2 Fe.sub.x O.sub.y):
- 7.14-8.08%
- Aluminum zirconium powder (Al.Zr):
- 0.19-0.21%
- Iron powder (Fe):
- 1.00-1.14%
- the lithium oxide being present in a sintered composite with the iron oxides in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 3.17-3.59%
- Magnesium/aluminum powder (MgAl):
- 2.91-3.29%
- Aluminum powder (Al):
- 1.65-1.87%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 1.35-1.53%
- Barium carbonate:
- 0.48-0.54%
- Foundry Ferro-titanium powder (Fe.Ti):
- 0.38-0.43%
- Magnesite (MgO):
- 0.76-0.86%
- Potassium fluosilicate (K.sub.2 SiF.sub.6):
- 0.095-0.108%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 OSiO.sub.2.Fe.sub.x O.sub.y):
- 7.14-8.08%
- Aluminum zirconium powder (Al.Zr):
- 0.38-0.43%
- Iron powder (Fe):
- 0.59-0.67%
- the lithium oxide being present in a sintered composite with the iron oxides in a one to at least one mole ratio.
An arc welding electrode comprised of a tube of low carbon steel having on the inside thereof as major ingredients, as percentage of total electrode weight:
- Lithium ferrate sinter (Li.sub.2 O.Fe.sub.x O.sub.y):
- 3.17-3.59%
- Magnesium aluminum powder (MgAl):
- 2.91-3.29%
- Aluminum powder (Al):
- 1.75-1.98%
- Lithium carbonate (Li.sub.2 O.CO.sub.2):
- 1.35-1.53%
- Barium carbonate:
- 0.48-0.54%
- Foundry Ferro-titanium powder (Fe.Ti):
- 0.38-0.43%
- Magnesite (MgO):
- 0.76-0.86%
- Potassium fluosilicate (K.sub.2 SiF.sub.6):
- 0.095-0.108%
- Lithium ferrate-Lithium silicate sinter (Li.sub.2 O.SiO.Fe.sub.x O.sub.y):
- 7.14-8.08%
- Aluminum zirconium powder (Al.Zr):
- 0.38-0.43%
- Iron powder (Fe):
- 0.59-0.67%
- the lithium oxide being present in a sintered composite with the iron oxides in a one to at least one mole ratio.
Dependencies are inferred from the claim text.