Hard film for cutting tools, cutting tool coated with hard film, process for forming hard film, and target used to form hard film
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United States of America Patent
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Nov 30, 2004
Grant Date -
Nov 14, 2002
app pub date -
Dec 26, 2001
filing date -
Dec 28, 2000
priority date (Note) -
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Abstract
A hard film for cutting tools which is composed of (Ti.sub.1-a-b-c-d, Al.sub.a, Cr.sub.b, Si.sub.c, B.sub.d)(C.sub.1-a N.sub.e) 0.5.ltoreq.a.ltoreq.0.8, 0.06.ltoreq.b, 0.ltoreq.c.ltoreq.0.1, 0.ltoreq.d.ltoreq.0.1, 0.ltoreq.c+d.ltoreq.0.1, a+b+c+d<1, 0.5.ltoreq.e.ltoreq.1 (where a, b, c, and d denote respectively the atomic ratios Al, Cr, Si, and B, and e denotes the atomic ratio of N.)
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