Method of coating cutting tools
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United States of America Patent
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Dec 7, 2004
Grant Date -
Aug 1, 2002
app pub date -
Jan 9, 2002
filing date -
Jun 16, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods of coating cutting tool inserts including a hard substrate and a plurality of coatings are disclosed. In one embodiment, the method comprises applying a first coating of at least 2 microns to at least a portion of the hard substrate and applying a second coating. The first coating can comprise at least one of a metal carbide, a metal nitride, and a metal carbonitride of at least one metal selected from zirconium and hafnium. The second coating can comprise at least one of a metal carbide, a metal boride, a metal nitride, and a metal oxide of a metal selected from groups IIIA, IVB, VB, and VIB of the periodic table. Optionally, third and fourth coatings are also applied to the cutting tool inserts.
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