METHOD OF COATING A HARD-METAL OR CERMET SUBSTRATE AND COATED HARD-METAL OR CERMET BODY
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United States of America Patent
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Issued Date -
Jun 17, 2010
app pub date -
Nov 7, 2006
filing date -
Jan 17, 2006
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Abandoned
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Abstract
The invention relates to a method of coating a cemented carbide or cermet substrate body by means of PVD, in which the fully sintered substrate body is subjected without further intermediate treatment before PVD coating to a blasting treatment using a particulate blasting agent until the zone close to the surface of the substrate body has a residual stress which is at least essentially of the same magnitude as the residual stress present in the single or first applied PVD layer. The invention further relates to such a coated cemented carbide or cermet body, in particular in the form of a cutting tool.
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