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US 10,895,001 B2Granted
Rock drill button
AssigneeSandvik Intellectual Property AB
InventorsAnders Nordgren, Anna Ekmarker, Susanne Norgren
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Abstract
A rock drill button having a body of sintered cemented carbide that has hard constituents of tungsten carbide (WC) in a binder phase of Co, wherein the cemented carbide has 4-12 mass % Co and balance WC and unavoidable impurities. The cemented carbide also has Cr in such an amount that the Cr/Co ratio is within the range of 0.043-0.19, and that the WC grain size mean value is above 1.75 μm.
Claims13
A rock drill button, consisting of:
- a body having an active part at a tip portion arranged to engage a rock to be drilled, the active part being made of sintered cemented carbide that consists of hard constituents of tungsten carbide (WC) in a binder phase comprising Co, wherein the cemented carbide comprises 4-12 mass % Co, Cr and a balance of WC and unavoidable impurities, and wherein said cemented carbide comprises Cr in such an amount that the Cr/Co ratio is within the range of 0.043-0.19, and wherein a WC grain size mean value is above 1.75 μm.
Dependencies are inferred from the claim text.