Spray powder for hardfacing and part with hardfacing
AssigneeKennametal Inc.
InventorCharles J. Terry
Life of this patent
Estimating the term…
Abstract
A spray powder for thermal spraying onto a substrate to provide a hardfacing, and a part with such hardfacing on the surface thereof, that is corrosion-resistant and abrasion-resistant. The spray powder comprises between about 75 to about 90 weight percent of tungsten carbide. The powder further comprises between about 10 and 25 weight percent of a nickel-based alloy, which includes Mo, and optionally, includes one or more of Fe, C, Cr, Mn, Co, Si and W.
Claims20
A sintered spray powder for application as a corrosion-resistant hardfacing on a substrate, the sintered powder consisting essentially of:
- WC in an amount between about 75 and about 90 weight percent of the sintered powder;
- Mo in an amount of between about 1.6 and about 7.5 weight percent of the sintered powder;
- Fe in an amount of between 0 and about 2 weight percent of the sintered powder;
- C, other than C combined in WC, in an amount of between 0 and about 0.03 weight percent of the sintered powder;
- Cr in an amount of between 0 and about 4.4 weight percent of the sintered powder;
- Mn in an amount of between 0 and about 0.25 weight percent of the sintered powder;
- Co in an amount of between 0 and about 0.63 weight percent of the sintered powder;
- Si in an amount of between 0 and about 0.25 weight percent of the sintered powder;
- W, other than W combined in WC, in an amount of between 0 and about 1.4 weight percent of the sintered powder;
- and
- the balance nickel, wherein at least about 3.4 weight percent of the sintered powder is nickel.
A sintered spray powder consisting essentially of:
- about 80 weight percent of tungsten carbide;
- between about 3.2 and about 6 weight percent Mo;
- between 0 and about 1.6 weight percent Fe;
- between 0 and about 0.0024 weight percent C, other than C combined in WC;
- between 0 and about 3.5 weight percent Cr;
- between 0 and about 0.2 weight percent manganese;
- between 0 and about 0.5 weight percent cobalt;
- between 0 and about 0.2 weight percent Si;
- between 0 and about 1.06 weight percent tungsten metal, other than tungsten combined in WC;
- and
- the balance nickel wherein at least about 6.8 weight percent of the powder is nickel.
A sintered spray powder consisting essentially of:
- about 88 weight percent of tungsten carbide;
- between about 1.9 and about 3.6 weight percent Mo;
- between 0 and about 1 weight percent Fe;
- between 0 and about 0.015 weight percent C, other than C combined in WC;
- between 0 and about 2.1 weight percent Cr;
- between 0 and about 0.12 weight percent manganese;
- between 0 and about 0.3 weight percent cobalt;
- between 0 and about 0.12 weight percent Si;
- between 0 and about 0.64 weight percent tungsten metal, other than tungsten combined in WC;
- and
- and balance nickel wherein at least about 4.1 weight percent of the powder is nickel.
A part having a surface with hardfacing on the surface, the hardfacing consisting essentially of:
- WC in an amount between about 75 and about 90 weight percent;
- Mo in an amount of between about 1.6 and about 7.5 weight percent;
- Fe in an amount of between 0 and about 2 weight percent;
- C, other than C combined in WC, in an amount of between 0 and about 0.03 weight percent;
- Cr in an amount of between 0 and about 4.4 weight percent;
- Mn in an amount of between 0 and about 0.25 weight percent;
- Co in an amount of between 0 and about 0.63 weight percent;
- Si in an amount of between 0 and about 0.25 weight percent;
- W, other than W combined in WC, in an amount of between 0 and about 1.4 weight percent;
- and
- the balance nickel, wherein at least about 3.4 weight percent is nickel.
Dependencies are inferred from the claim text.