| abstract |
(M a Al b Cr c Ta D ) (B x C y N z ) wherein M is V, etc., 0? A? 0.35, 0.05? D? 0.35, 0? X? 0.15, a + b + c + d = 1, x + y + z = 1] in the layer A and, (Ti α Si β) ( B x C y N z) [ stage, 0.05≤β≤0.35, 0≤x≤ 0.15, 0? Y? 0.50,? +? = 1, x + y + z = 1] are laminated alternately in one or more layers. |