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US 11,111,563 B2Granted
High strength and erosion resistant powder blends
AssigneeGlobal Tungsten & Powders Corp.
InventorsRavi K. Enneti, Kevin Prough, Keith Newman
Life of this patent
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Abstract
Composites comprising various fractions of ultra coarse (UC) tungsten carbide (WC) and cast carbide (CC), along with composites comprising fractions of UC-WC and CC having various particle size and showing an improved strength and erosion resistance, and methods for making the inventive composites.
Claims18
A method for preparing a composite comprising:
- a) contacting about 40-70 wt % of a first fraction of ultra coarse tungsten carbide
- with about 30-60 wt % a first fraction of cast carbide (CC) to form a blend, wherein the blend has a tap density of about 9-11.5 g/cm3;
- b) tapping the blend for at least 5 cycles;
- and
- c) infiltrating the tapped blend with a copper containing alloy, thereby forming the composite,
- wherein the formed composite exhibits volume loss of at least 20% lower as compared to a conventional GM-6 metal powder when measured accordingly to ASTM G65 and ASTM G76.
3 more elements
Dependencies are inferred from the claim text.