Method for increasing compression stress or reducing internal tension stress of a CVD, PCVD or PVD layer and cutting insert for machining
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United States of America Patent
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Apr 26, 2005
Grant Date -
Jun 5, 2003
app pub date -
Oct 16, 2002
filing date -
Mar 27, 2001
priority date (Note) -
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Abstract
A method of increasing the compressive stress or of reducing the tensile residual stress of a CVD layer, a PCVD layer or PVD layer and a cutting insert for machining. The invention relates to a method of increasing the compressive residual stress or of reducing the tensile residual stress of a hard material outer layer or a hard material outermost layer in which the coated substrate after coating is subjected to a dry blast treatment using a granular blast agent that, according to the invention, has a maximum diameter of 150 .mu.m.
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