Laminated hard coating and molding die

Patent metadata

Field	Value
Publication number	US-2017291211-A1
Application number	US-201515512712-A
Country	US
Kind code	A1
Filing date	Sep 15, 2015
Priority date	Sep 24, 2014
Publication date	Oct 12, 2017
Grant date	—

Abstract

A laminated hard film is obtained by laminating a layer A and a layer B. The layer A has a composition different from that of the layer B. The layer A is formed of (Ti a Cr b Al c Si d )(C x N 1-x ) and satisifies the relationship of 0≦a≦0.10, 0.10≦b≦0.50, 0.50≦c≦0.90, 0≦d≦0.05, a+b+c+d=1 and 0≦x≦0.5. The layer B is formed of (Cr e Si 1-e )(C y N 1-y ) and satisfies the relationship of 0.90≦e≦1.0 and 0≦y≦0.5, or is formed of (Al f Si 1-f )(C 2 N 1-z ) and satisfies the relationship of 0.90≦f≦1.0 and 0≦x≦0.5. Each of the layer A and the layer B has a thickness of 2 to 100 nm, and the layer A and the layer B are each alternately laminated.

First claim

1 . A laminated hard film obtained by laminating a layer A and a layer B, the layer A having a composition different from that of the layer B, wherein
the layer A is formed of (Ti a Cr b Al c Si d )(C x N 1-x ) and satisfies the relationship of 0≦a≦0.10, 0.10≦b≦0.50, 0.50≦c≦0.90, 0≦d≦0.05, a+b+c+d=1 and 0≦x≦0.5, when atomic ratios of Ti, Cr, Al, Si and C are defined as a, b, c, d and x, respectively, the layer B is formed of (Cr e Si 1-e ) (C y N 1-y ) and satisfies the relationship of 0.90≦e≦1.0 and 0≦y≦0.5, when atomic ratios of Cr and C are defined as e and y, respectively, or is formed of (Al f Si 1-f )(C z N 1-z ) and satisfies the relationship of 0.90≦f≦1.0 and 0≦y≦0.5, when atomic ratios of Al and C are defined as f and z, respectively, and each of the layer A and the layer B has a thickness of 2 to 100 nm, and the layer A and the layer B are each alternately laminated.

2 . The laminated hard film according to claim 1 , wherein the atomic ratio of Al to a total of Ti, Cr, Al and Si in the layer A and the layer B falls within a range of 020 to 0.60.

3 . The laminated hard film according to claim 1 , wherein Ti in the layer A is at least partially substituted with Zr.

4 . A molding die comprising the laminated hard film according to claim 1 , a substrate surface.

5 . A molding die comprising the laminated hard film according to claim 3 , a substrate surface.

6 . The molding die according to claim 4 , comprising an intermediate layer of CrN having a thickness of 3 to 10 μm between the laminated hard film and the substrate.

7 . The molding die according to claim 5 , comprising an intermediate layer of CrN having a thickness of 3 to 10 μm between the laminated hard film and the substrate.

8 . The molding die according to claim 6 , which is suitable for hot forming of a steel material.

9 . The molding die according to claim 7 , which is suitable for hot forming of a steel material.

10 . The laminated hard film according to claim 2 , wherein Ti in the layer A is at least partially substituted with Zr.

11 . A molding die comprising the laminated hard film according to claim 2 on a substrate surface.

12 . A molding die comprising the laminated hard film according to claim 10 on a substrate surface.

13 . The molding die according to claim 11 , comprising an intermediate layer of CrN having a thickness of 3 to 10 μm between the laminated hard film and the substrate.

14 . The molding die according to claim 12 , comprising an intermediate layer of CrN having a thickness of 3 to 10 μm between the laminated hard film and the substrate.

15 . The molding die according to claim 13 , which is suitable for hot forming of a steel material.

16 . The molding die according to claim 14 , which is suitable for hot forming of a steel material.

Assignees

• Kobe Steel Ltd

Inventors

• Yamamoto Kenji

Classifications

• C23C14/0664

  Carbonitrides · CPC title

• C23C14/32

  by explosion; by evaporation and subsequent ionisation of the vapours {, e.g. ion-plating}(C23C14/34 - C23C14/48 take precedence) · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• C23C14/0641

  Nitrides (C23C14/0617 takes precedence) · CPC title

• B21D37/01 Primary

  Selection of materials · CPC title