US 8,852,305 B2 · Nanolaminated coated cutting tool

Abstract

A cutting tool insert for machining by chip removal includes a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel, onto which a hard and wear resistant coating is deposited by physical vapor deposition. The coating includes a polycrystalline nanolaminated structure of alternating layers A and B where layer A is (Ti,Al,Me1)N and Me1 is optionally one or more of the metal elements from group 3, 4, 5 or 6 in the periodic table, layer B is (Ti,Si,Me2)N and Me2 is optionally one or more of the metal elements from group 3, 4, 5 or 6 in the periodic table including Al with a thickness between 0.5 and 20 μm and method of making the same. This insert is particularly useful in metal cutting applications generating high temperatures with improved edge integrity, machining of super alloys, stainless and hardened steels.

Claims18

Dependent claims

A cutting tool insert for machining by chip removal, comprising:

a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel;
and
a coating deposited on the body by physical vapour deposition, said coating comprising
a columnar and polycrystalline nanolaminated structure of alternating A and B layers where
layer A is (Ti1-x-pAlxMe1p)Na, with 0.3<x<0.95, 0.90<a<1.10, 0≦p<0.15, and Me1 is one or more of Zr, Y, V, Nb, Mo or N, and where
layer B is (Ti1-y-zSiyMe2z) Nb, with 0.05<y<0.25, 0≦z<0.4, 0.9<b<1.1, and Me2 is one or more of Y, V, Nb, Mo, N and Al, with a thickness of the nanolaminated structure between 0.5 and 20 μm, an average column width between 20 and 1000 nm, and an average individual thickness of A and B layers between 1 and 50 nm.

3 more elements

Dependencies are inferred from the claim text.

Nanolaminated coated cutting tool

Life of this patent

Nanolaminated coated cutting tool

Life of this patent

Abstract

Claims18