Fabrication method for diamond-coated cemented carbide cutting t

Details Fabrication method for diamond-coated cemented carbide cutting t Fabrication method for diamond-coated cemented carbide cutting t

1996-09-12

1997-12-23

King, Roy V.

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

427309, 205674, 407119, 1566561, C23C 1626, B05D 310

Patent

active

057005184

ABSTRACT:
A fabrication method for a diamond-coated cemented carbide cutting tool includes electrolytically etching the surface of a cemented carbide cutting tool with a NaOH or KOH aqueous solution or chemically etching the surface of the cemented carbide cutting tool with a KMnO.sub.4 +KOH aqueous solution, and depositing a diamond film on the cemented carbide cutting tool. A stronger etching effect than by using a Murakami solution can be achieved, and no poisonous material is included in the etchant. In addition, disposal of the waste etchant is made simpler, and the adhesion between the diamond film coating and the cemented carbide cutting tool can be strengthened.

REFERENCES:
patent: 4601783 (1986-07-01), Krulik
patent: 5236740 (1993-08-01), Peters et al.
patent: 5380408 (1995-01-01), Svensson
Shibuki et al, "Adhesion Strength of Diamond Films on Cemented Carbide Substrates", Surface and Coatings Technology, 36(1988) pp. 295-302.

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