Cubic boron nitride powder suitable for producing cutter and production method therefor


Application Number: 00105817
Application Date: 2000.04.06
Publication Number: 1269272
Publication Date: 2000.10.11
Priority Information: 1999/4/7 SE 9901221-3
International: B22F7/08;C22C29/16
Applicant(s) Name: Sandvik AB
Address:
Inventor(s) Name: Ulf Roland;Grord Veinler
Patent Agency Code: 72002
Patent Agent: guo xiaodong
Abstract The present invention relates to a method of making a PCBN cutting tool insert. The method includes the following steps: mixing raw material powders containing cBN and one or more of hBN, TiC, TiN, Ti(C,N), WC, W, C, Co, Co2Al9, Al, AlN, Al2O3 with a suitable liquid (e.g. ethanol) and a suitable agent (e.g. polyethylene glycol, PEG) to form a homogeneous slurry with desired composition forming spherical powder agglomerates, typically 100 mu m in diameter, preferably by spray drying filling the PCBN powder into recesses, pockets, grooves etc of a cemented carbide or cermet substrate. causing the PCBN powder to be sintered together and simultaneously bonded to the substrate inside a container under HP/HT-conditions to form a composite body.

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