Coated Cutting Tool
First Claim
Patent Images
1. A coated cutting tool comprising a substrate and a coating;
- wherein;
the coating comprises at least one multi-nano-layer comprising a plurality of nano-composite nano-layers;
the nano-composite nano-layers consist of crystalline (TixAlyCrz)N embedded in an amorphous Si3N4 matrix, wherein 0.25≦
x≦
0.75, 0.25≦
y<
0.75, 0.05≦
z≦
0.2, 0.85≦
x+y+z≦
0.97, and 1−
x−
z<
0.75;
the atomic ratio of silicon is 1−
x−
y−
z; and
a thickness of the nano-composite nano-layers is from 1 nm to 100 nm.
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Abstract
A coated cutting tool has a substrate and a coating. The coating includes at least one multi-nano-layer having a nano-composite nano-layer formed of crystalline (TixAlyCrz)N and amorphous Si3N4, wherein 0.25≦x≦0.75, 0.25≦y≦0.75, 0.05≦z≦0.2, 0.85≦x+y+z≦0.97. The atomic ratio of silicon is 1−x−y−z and 1−x−z<0.75 and the thickness of the nano-composite nano-layer is from 1 nm to 100 nm.
18 Citations
22 Claims
-
1. A coated cutting tool comprising a substrate and a coating;
- wherein;
the coating comprises at least one multi-nano-layer comprising a plurality of nano-composite nano-layers; the nano-composite nano-layers consist of crystalline (TixAlyCrz)N embedded in an amorphous Si3N4 matrix, wherein 0.25≦
x≦
0.75, 0.25≦
y<
0.75, 0.05≦
z≦
0.2, 0.85≦
x+y+z≦
0.97, and 1−
x−
z<
0.75;the atomic ratio of silicon is 1−
x−
y−
z; anda thickness of the nano-composite nano-layers is from 1 nm to 100 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- wherein;
-
17. A method of coating a cutting tool substrate with a coating comprising at least one multi-nano-layer, the method comprising the steps of:
-
a) depositing a nano-composite nano-layer over the substrate, the nano-composite nano-layer consisting of crystalline (TixAlyCrz)N embedded in an amorphous Si3N4 matrix, wherein 0.25≦
x≦
0.75, 0.25≦
y<
0.75, 0.05≦
z≦
0.2, 0.85≦
x+y+z≦
0.97, and 1−
x−
z<
0.75, wherein;the atomic ratio of silicon is 1−
x−
y−
z; anda thickness of the nano-composite nano-layer is from 1 nm to 100 nm; b) depositing at least one second nano-layer over the nano-composite nano-layer, the second nano-layer being crystalline, having a thickness of from 1 nm to 100 nm and comprising; (a1) a metallic material consisting of one or more metals selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Y and Ru;
or(a2) a ceramic material comprising; (a21) one or more of a boride, carbide, nitride, or oxide of one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Si, Y and Ru, (a22) diamond, or (a23) BN; and c) alternatingly performing step a and step b 50 to 300 times. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification