Cutting tool, process for coating a cutting tool and use thereof
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
May 1, 1998
filing date -
Nov 24, 1995
priority date (Note) -
Expired
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Abstract
A cutting tool for chip removal machining is composed of hard metal, cermet or ceramic as a sutrate coated with a surface coating being composed of both hexagonal and amorphous boron nitrides. At least an outer most coating is being composed of boron nitrides a thickness of between 1 and 5 .mu.m. The surface has a total thickness which does not exceed 20 .mu.m and at least 20 volume % of the outermost coating is composed of hexagonal boron nitride. The infrared spectrum of the outermost boron nitride layer has absorption lines the wave numbers at 800 to 1400 cm.sup.-1.
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