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US 8,074,865 B2Granted
Gradient polycrystalline cubic boron nitride materials and tools incorporating such materials
AssigneeSmith International, Inc.
InventorXian Yao
Life of this patent
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Abstract
Gradient polycrystalline cubic boron nitride (PCBN) materials are provided as well as tools incorporating such materials.
Claims31
A friction stir welding (FSW) tool comprising:
- a spindle;
- a base coupled to the spindle;
- and
- a pin extending from the base for stirring materials being welded by said FSW tool, wherein at least a portion of the base comprises a first high pressure high temperature (HPHT) sintered polycrystalline cubic boron nitride (PCBN) material and wherein the pin comprises a second HPHT sintered PCBN material, wherein the first PCBN material has a composition different from the second PCBN material.
1 more element
Dependencies are inferred from the claim text.