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US 7,611,591 B2Granted
Structure and method of manufacturing the same
AssigneeSumitomo Electric Industries, Ltd.
InventorsKoji Nitta, Kenji Miyazaki, Shinji Inazawa
Life of this patent
Estimating the term…
Abstract
A structure which comprises tungsten as the main component and contains tungsten carbide, wherein the content of carbon is 0.1 mass % or higher based on the structure and the total content of cobalt, nickel, and iron is 3 mass % or lower based on the structure.
Claims2
A structure comprising tungsten as a main component and tungsten carbide, wherein content of the tungsten is at least 50% by mass, content of carbon in the structure is at least 0.1% by mass and total content of cobalt, nickel, and iron is 3% or less by mass, respectively based on the structure,
- wherein the structure has pools having a size of at least 5 μm and consisting of at least one element selected from the group consisting of cobalt, nickel, and iron, and the number of pools is not more than one per 100 mm2 of the surface of the structure.
Dependencies are inferred from the claim text.