Hardfacing electrode
AssigneeLincoln Global, Inc.
InventorsAshish Kapoor, Teresa Melfi, Damian Kotecki
Life of this patent
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Abstract
An electrode to form a hardfacing alloy for use as a surfacing on metal that is subjected to high thermal and mechanical stresses. The electrode includes chromium, a metal sensitization inhibitor, and iron to form a hardfacing alloy.
Claims21
An electrode for forming a hardfacing alloy for application to a metal surface, said electrode including iron, at least 0.05 weight percent by electrode vanadium and over 0.1 weight percent by electrode niobium, said hardfacing alloy comprising of at least about 7 weight percent chromium, at least about 0.02 weight percent nitrogen, metal sensitization inhibitor, and a majority weight percent iron, said hardfacing alloy containing less than about 6% ferrite, said metal sensitization inhibitor in said hardfacing alloy including a metal selected from the group consisting of at least about 0.3% niobium, at least about 0.05% vanadium, and combinations thereof, said electrode including a metal sheath and a fill composition said fill composition comprising by weight percent of said total electrode:
- Aluminum
- up to 1%
- Carbon
- up to 0.3%
- Cobalt
- 0-0.06%
- Copper
- 0-0.01%
- Chromium
- 1-15%
- Iron
- up to 8%
- Magnesium
- 0-0.4%
- Manganese
- up to 1.5%
- Molybdenum
- 0-1%
- Niobium
- up to 0.8%
- Nickel
- 0-8%
- Silicon
- 0-0.9%
- Tantalum
- 0-0.05%
- Titanium
- 0-0.08%
- Vanadium
- 0.05-0.3%
- Zinc
- 0-0.004%.
An electrode for forming an alloy on a metal surface, said electrode comprising by weight percent electrode:
- Carbon
- 0.05-0.4%
- Chromium
- 5-20%
- Iron
- 75-93%
- Niobium
- 0.2-1%
- Nickel
- 1-10%
- Vanadium
- 0.04-0.4%.
A method of applying a hardfacing alloy on a metal surface comprising:
- a) selecting a workpiece metal;
- and,
- b) applying a high chromium alloy metal at least partially on said workpiece by use of an electrode, said electrode comprising by weight percent electrode about 0.05-0.4% carbon, about 5-20% chromium, about 75-93% iron, about 0.2-1% niobium, about 1-10% nickel, and about 0.04-0.4% vanadium.
Dependencies are inferred from the claim text.