Imparting wear resistance to superalloy articles
AssigneeKennametal Inc.
InventorsMartin G. Perez, Michael Meyer, Robert W. Monds, Loretta M. Bell
Life of this patent
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Abstract
In one aspect, composite preforms are provided for imparting wear resistance to superalloy articles. The composite preforms can be employed for metallurgically bonding alloy wear plates or pads to superalloy articles. A composite preform, in some embodiments, comprises a powder alloy composition comprising 1-30 wt. % nickel, 0.05-2 wt. % iron, 15-25 wt. % chromium, 10-30 wt. % molybdenum, 0-1 wt. % carbon, 1-5 wt. % silicon, 0.05-2 wt. % boron, 0-5 wt. % tungsten, 0-3 wt. % tantalum, 0-0.1 wt % manganese, 0-3 wt. % aluminum, 0-0.1 wt % yttrium and the balance cobalt.
Claims6
A composite preform comprising:
- a powder alloy composition comprising a mixture of a CoMoCrSi powder alloy, and a cobalt braze powder alloy having a lower melting temperature than the CoMoCrSi powder alloy, wherein the CoMoCrSi powder alloy comprises 5-20 wt. % chromium, 22-32 wt. % molybdenum, 1-4 wt. % silicon and the balance cobalt, and the cobalt braze powder alloy comprises 20-29 wt. % chromium, 5-15 wt. % nickel, 3-10 wt. % tungsten, 0-5 wt. % tantalum, 1-4 wt. % boron, 0-1 wt. % carbon and the balance cobalt, wherein the CoMoCrSi powder alloy is present in an amount of 10-90 weight percent of the powder alloy composition.
Dependencies are inferred from the claim text.