Systems and methods for welding electrodes

1. A tubular welding wire for joining steel workpieces via arc welding, comprising:

a steel sheath disposed around a core, wherein the core comprises:

iron powder;

iron titanium powder;

silico-manganese powder;

iron silicon powder;

iron sulfide;

graphite;

rare earth compound; and

a frit comprising a Group I or Group II compound, silicon dioxide, manganese oxide or manganese dioxide, and titanium dioxide,

wherein the graphite and the frit together comprise less than 10% of the core by weight.

2. The tubular welding wire of claim 1 , wherein the graphite and the frit together comprise between 0.05% and 5% of the core by weight.

3. The tubular welding wire of claim 2 , wherein the graphite and the frit together comprise between 1% and 2.5% of the core by weight.

4. The tubular welding wire of claim 1 , wherein the Group I or Group II compound comprises a Group I oxide, a Group II oxide, a Group I fluoride, or Group II fluoride.

5. The tubular welding wire of claim 4 , wherein the Group I or Group II compound comprises potassium oxide, sodium oxide, or a combination thereof.

6. The tubular welding wire of claim 1 , wherein the rare earth compound comprises a rare earth metal oxide.

7. The tubular welding wire of claim 6 , wherein the rare earth metal oxide comprises cerium oxide, lanthanum oxide, or samarium oxide.

8. The tubular welding wire of claim 1 , wherein the rare earth compound comprises a rare earth metal silicide.

9. The tubular welding wire of claim 8 , wherein the rare earth metal silicide comprises cerium silicide.

10. The tubular welding wire of claim 1 , wherein iron sulfide is the only sulfur source of the tubular welding wire.

11. The tubular welding wire of claim 1 , wherein the silico-manganese powder comprises 62% manganese, 30% silicon, and 8% iron by weight of the silico-manganese powder.

12. The tubular welding wire of claim 1 , wherein the frit comprises between 22% and 25% potassium oxide, sodium oxide, or both; between 16% and 22% manganese oxide, manganese dioxide, or both; between 10% and 18% silicon dioxide; and between 38% and 42% titanium dioxide by weight of the frit.

13. A tubular welding wire for arc welding a coated steel workpiece, wherein the tubular welding wire comprises:

a steel sheath disposed around a core,

wherein the core comprises silico-manganese powder, iron silicon powder, graphite, and a frit,

wherein the frit comprises:

sodium oxide or potassium oxide;

manganese oxide or manganese dioxide;

silicon dioxide; and

titanium dioxide;

wherein the graphite and the frit together comprise less than 10% of the core by weight, and

wherein, during arc welding, the tubular welding wire produces a soft arc that provides suitable heat to vaporize a coating of the coated steel workpiece and to fuse portions of the coated steel workpiece without burn-through.

14. The tubular welding wire of claim 13 , wherein the core comprises a rare earth compound and iron sulfide.

15. The tubular welding wire of claim 14 , wherein the core comprises:

0.5% graphite;

2% of the frit;

3% rare earth silicide; and

0.4% iron sulfide.

16. A tubular welding wire for arc welding a coated steel workpiece, wherein the tubular welding wire comprises:

a steel sheath disposed around a core, wherein the core consists of:

alloying components, wherein the alloying components comprise iron powder, iron titanium powder, silico-manganese powder, and iron silicon powder;

a carbon source;

a sulfur source;

a rare earth compound; and

a frit comprising:

sodium oxide or potassium oxide;

manganese oxide or manganese dioxide;

silicon dioxide; and

titanium dioxide; and

wherein, during arc welding, the tubular welding wire produces a soft arc that provides suitable heat to vaporize a coating of the coated steel workpiece and to fuse portions of the coated steel workpiece without burn-through.

17. The tubular welding wire of claim 16 , wherein the carbon source is graphite, the sulfur source is iron sulfide, and the rare earth compound is rare earth silicide.

18. The tubular welding wire of claim 17 , wherein the core comprises:

72% iron powder;

1% iron titanium powder;

17% silica-manganese powder;

4% iron silicon powder;

0.4% iron sulfide;

0.5% graphite;

3% rare earth silicide; and

2% of the frit by weight.