Body with a metal based nitride layer and a method for coating the body

Patent metadata

Field	Value
Publication number	US-9540722-B2
Application number	US-201314382844-A
Country	US
Kind code	B2
Filing date	Mar 6, 2013
Priority date	Mar 7, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A hard and wear resistant coating for a body includes at least one metal based nitride layer having improved high temperature performance. The layer is (Zr1-x-zSixMez)Ny with 0<x<0.30, 0.90<y<1.20, 0≦z<0.25, and Me is one or more of the elements Y, Ti, Nb, Ta, Cr, Mo, W and Al, comprised of a single cubic phase, a single hexagonal phase or a mixture thereof, with a cubic phase of a sodium chloride structure and a thickness between 0.5 μm and 15 μm. The layer is deposited using cathodic arc evaporation and is useful for metal cutting applications generating high temperatures.

First claim

The invention claimed is:

1. A hard and wear resistant coating for a body, the coating comprising:
at least one metal based nitride layer deposited on the body by cathodic arc evaporation, wherein said at least one metal based nitride layer is (Zr 1−x−z Si x Me z )N y with 0<x<0.15, 0.90<y <1.10, 0≦z<0.25, and Me is one or more of the elements Y, Ti, Nb, Ta, Cr, Mo and W, the at least one metal based nitride layer being selected from the group of a cubic phase of a sodium chloride structure, a single cubic phase, a single hexagonal phase, and a mixture thereof, the at least one metal based nitride layer having a thickness between 0.5 μm and 15 μm, and TC(200)>1.5 and simultaneously TC(111), TC(220) and TC(311) all being <1.5 wherein
TC(hkl) is determined from XRD data as follows:

TC
meas

⁡

(
hkl
)

=

I
meas

⁡

(
hkl
)

I
0

⁡

(
hkl
)

[

1
n

⁢

∑

n
=
1

n

⁢

I
meas

⁡

(
hkl
)

I
0

⁡

(
hkl
)

]

-
1

wherein
I meas (hkl) is a measured intensity of the (hkl) reflection and I o (hkl) a standard intensity according to JCPDS card no. 035-0753, and n=4 is the number of (hkl) reflections used in the calculations.

2. The hard and wear resistant coating according to claim 1 , wherein 0<x<0.15.

3. The hard and wear resistant coating according to claim 2 , wherein 0<x<0.085.

4. The hard and wear resistant coating according to claim 1 , wherein 0<z<0.15.

5. The hard and wear resistant coating according to claim 4 , wherein 0<z<0.10.

6. The hard and wear resistant coating according to claim 1 , wherein Me is one or more of the elements Ta, Ti, Nb, and Cr.

7. The hard and wear resistant coating according to claim 1 , wherein TC(200)>2.0.

8. The hard and wear resistant coating according to claim 1 , wherein said at least one metal based nitride layer has a thickness between 0.5 μm and 10 μm.

9. The hard and wear resistant coating according to claim 1 , wherein said at least one metal based nitride layer has a nanohardness>20 GPa.

10. The hard and wear resistant coating according to claim 9 , wherein said at least one metal based nitride layer has a nanohardness between 25 GPa and 40 GPa.

11. The hard and wear resistant coating according to claim 1 , wherein said coating comprises at least one innermost layer selected from the group of TiN, TiC, Ti(C,N) or (Ti,Al)N, followed by said (Zr,Si,Me)N layer and at least one outer layer selected from the group of TiN, TiC, Ti(C,N) or (Ti,Al)N, the coating having a total coating thickness between 1 μm and 20 μm.

12. The hard and wear resistant coating according to claim 11 , wherein the at least one innermost layer is a single layer of (Ti,Al)N.

13. The hard and wear resistant coating according to claim 11 , wherein the at least one innermost layer is a plurality of layers selected from the group of TiN, TiC, Ti(C,N) or (Ti,Al)N.

14. The hard and wear resistant coating according to claim 11 , wherein the at least one outer layer is a single layer of TiN.

15. The hard and wear resistant coating according to claim 11 , wherein the at least one outer layer is a plurality of layers selected from the group of TiN, TiC, Ti(C,N) or (Ti,Al)N.

16. The hard and wear resistant coating according to claim 11 , wherein the total coating thickness is between 1 μm and 15 μm.

17. The hard and wear resistant coating according to claim 11 , wherein the total coating thickness is between 1 μm and 7 μm.

18. The hard and wear resistant coating according to claim 1 , wherein said at least one metal based nitride layer is deposited onto a cutting tool insert for machining by chip removal, said insert comprising a body of a hard alloy selected from the group of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel.

19. A method of using a cutting tool insert for machining by chip removal, comprising the steps of:
providing a cutting tool insert, the insert including a body of a hard alloy selected from the group of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel and depositing at least one metal based nitride layer onto the cutting tool insert by cathodic arc evaporation, wherein said at least one metal based nitride layer is (Zr 1−x−z Si x Me z )N y with 0<x<0.15, 0.90<y<1.10, 0≦z<0.25, and Me is one or more of the elements Y, Ti, Nb, Ta, Cr, Mo and W, the at least one metal based nitride layer being selected from the group of a cubic phase of a sodium chloride structure, a single cubic phase, a single hexagonal phase, and a mixture thereof, the at least one metal based nitride layer having a thickness between 0.5 μm and 15 μm, and TC(200)>1.5 and simultaneously TC(111), TC(220) and TC(311) all being<1.5 wherein
TC(hkl) is determined from XRD data as follows:

TC
meas

⁡

(
hkl
)

=

I
meas

⁡

Assignees

• Seco Tools Ab

Inventors

• Andersson Jon
• Forsen Rickard
• Ghafoor Naureen
• Johansson Jöessar Mats
• Oden Magnus

Classifications

• B23C2224/00

  Materials of tools or workpieces composed of a compound including a metal · CPC title

• C23C14/0641 Primary

  Nitrides (C23C14/0617 takes precedence) · CPC title

• B23B27/148

  Composition of the cutting inserts · CPC title

• B23C5/20

  with removable cutter bits or teeth {or cutting inserts} · CPC title

• B23B2224/00

  Materials of tools or workpieces composed of a compound including a metal · CPC title