Abstract: Provided is a hard film for a cutting tool formed on a surface of a base material, the hard film being comprised of a nano multi-layered structure formed by sequentially stacking a thin layer A, a thin layer B, a thin layer C and a thin layer D or being comprised of a structure formed by repeatedly stacking the nano multi-layered structure at least twice, wherein the thin layer A is comprised of TixAl1-xN (0.5?x?1.7); the thin layer B is comprised of Al1-y-zTiyMezN (0.4?y?0.7, 0<z?0.1 where Me is at least one of Si, Cr, and Nb); the thin layer C is comprised of AlaTi1-aN (0.5?a?0.7); and the thin layer D is comprised of AlbCr1-bN (0.5?b?0.7).

Abstract: Provided is a hard film for a cutting tool formed on a surface of a base material, the hard film being comprised of a nano multi-layered structure comprising a thin layer A, a thin layer B, a thin layer C and a thin layer D or a structure in which the nano multi-layered structure is repeatedly stacked at least twice, wherein the thin layer A is comprised of Ti1-xAlxN (0.5?x?0.7); the thin layer B is comprised of Al1-y-zTiyCrzN (0.3?y?0.6 and 0<z?0.3); the thin layer B is comprised of MeN (where Me is Nb or V); and the thin layer D is comprised of Al1-a-bTiaSibN (0.3?a?0.7 and 0<b<0.1).

Abstract: Provided is a hard film formed on a surface of a base material, the hard film being comprised of a nano multi-layered structure formed by stacking a thin layer A, a thin layer B a thin layer C in order of thin layers A-B-A-C from the base material or being comprised of a structure formed by repeatedly stacking the nano multi-layered structure at least twice, wherein the thin layer A is comprised of Ti1-xAlxN (0.3?x?0.7); the thin layer B is comprised of Al1-yCryN (0.3?y?0.7); and the thin layer C is comprised of MeN (where Me is any one of Nb, V, and Cr).

Abstract: The present invention discloses a multi-layer hard film for an indexable insert. The multi-layer hard film for the indexable insert provided by the present invention is formed by sequentially depositing a base layer, an intermediate layer and a top layer with different composition ratios and film structures individually on the indexable insert, thus minimizing a delamination and tool wear which may occur in high speed machining.

Abstract: The present invention discloses a multi-layer hard film for an indexable insert. The multi-layer hard film for the indexable insert provided by the present invention is formed by sequentially depositing a base layer, an intermediate layer and a top layer with different composition ratios and film structures individually on the indexable insert, thus minimizing a delamination and tool wear which may occur in high speed machining.