Coated tool

Patent metadata

Field	Value
Publication number	US-2017029931-A1
Application number	US-201515302209-A
Country	US
Kind code	A1
Filing date	Apr 10, 2015
Priority date	Apr 10, 2014
Publication date	Feb 2, 2017
Grant date	—

Abstract

The coated tool has a substrate and a coating layer. The coating layer contains alternating first and second laminated structures. The first laminated structure contains at least two kinds of alternating layers having different compositions. An average thickness of the layers contained in the first laminated structure is 60 nm or more and 500 nm or less. The second laminated structure contains at least two kinds of alternating layers having different compositions. An average thickness of the layers contained in the second laminated structure is 2 nm or more and less than 60 nm. The layers contained in the first laminated structure and the second laminated structure contain a compound having one or more specific metals and at least one or more of carbon, nitrogen, oxygen and boron. Average thickness(es) of the first and second laminated structure is/are continuously or stepwisely increased in a direction away from the substrate.

First claim

1 . A coated tool which comprises
a substrate, and a coating layer formed onto a surface of the substrate, wherein the coating layer contains a first laminated structure and a second laminated structure, the first laminated structure and the second laminated structure are laminated alternately and continuously twice or more, the first laminated structure contains at least two kinds of layers having different compositions, and the two kinds of layers are alternately laminated twice or more, an average thickness of the layers contained in the first laminated structure is 60 nm or more and 500 nm or less, the second laminated structure contains at least two kinds of layers having different compositions, and the two kinds of layers are alternately laminated twice or more, an average thickness of the layers contained in the second laminated structure is 2 nm or more and less than 60 nm, the layers contained in the first laminated structure and the second laminated structure contain a compound comprising at least one metal element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Si, Sr, Y, Sn and Bi, and at least one non-metal element selected from the group consisting of carbon, nitrogen, oxygen and boron, and an average thickness(es) of the first laminated structure and/or the second laminated structure is/are continuously or stepwisely increased from the substrate side toward a surface side of the coating layer.

2 . The coated tool according to claim 1 , wherein an average thickness of the first laminated structure is 0.2 μm or more and 6 μm or less.

3 . The coated tool according to claim 1 , wherein an average thickness of the second laminated structure is 0.02 μm or more and 6 μm or less.

4 . The coated tool according to claim 1 , wherein an average thickness of the whole coating layer is 0.22 μm or more and 12 μm or less.

5 . The coated tool according to claim 1 , wherein when an average thickness of the first laminated structure nearest to the substrate is given by TA 1 , and an average thickness of the first laminated structure nearest to the surface of the coating layer is given by TB 1 , then a ratio of TA 1 to TB 1 is 5% or more and 50% or less.

6 . The coated tool according to claim 1 , wherein when an average thickness of the second laminated structure nearest to the substrate is given by TA 2 , and an average thickness of the second laminated structure nearest to the surface of the coating layer is given by TB 2 , then a ratio of TA 2 to TB 2 is 5% or more and 50% or less.

7 . The coated tool according to claim 1 , wherein when an average thickness of the layers contained in the first laminated structure nearest to the substrate is given by TC 1 , and an average thickness of the layers contained in the first laminated structure nearest to the surface of the coating layer is given by TD 1 , then a ratio of TC 1 to TD 1 is 12% or more and 70% or less.

8 . The coated tool according to claim 1 , wherein when an average thickness of the layers contained in the second laminated structure nearest to the substrate is given by TC 2 , and an average thickness of the layers contained in the second laminated structure nearest to the surface of the coating layer is given by TD 2 , then a ratio of TC 2 to TD 2 is 5% or more and 70% or less.

9 . The coated tool according to claim 1 any one of claims 1 , wherein the layers contained in the first laminated structure and the layers contained in the second laminated structure contain a compound comprising at least two metal elements selected from the group consisting of Ti, Nb, Ta, Cr, W, Al, Si, Sr and Y, and at least one non-metal element selected from the group consisting of carbon, nitrogen, oxygen and boron.

10 . The coated tool according to claim 1 , wherein:
an average thickness of the first laminated structure is 0.2 μm or more and 6 μm or less; and an average thickness of the second laminated structure is 0.02 μm or more and 6 μm or less.

11 . The coated tool according to claim 10 , wherein:
an average thickness of the whole coating layer is 0.22 μm or more and 12 μm or less.

12 . The coated tool according to claim 11 , wherein:
a ratio of TA 1 to TB 1 is 5% or more and 50% or less, TA 1 being an average thickness of the first laminated structure nearest to the substrate; and TB 1 being an average thickness of the first laminated structure nearest to the surface of the coating layer.

13 . The coated tool according to claim 12 , wherein:
a ratio of TA 2 to TB 2 is 5% or more and 50% or less, TA 2 being an average thickness of the second laminated structure nearest to the substrate; and TB 2 being an average thickness of the second laminated structure nearest to the surface of the coating layer.

14 . The coated tool according to claim 13 , wherein:
a ratio of TC 1 to TD 1 is 12% or more and 70% or less, TC 1 being an average thickness of the layers contained in the first laminated structure nearest to the substrate; and TD 1 being an average thickness of the layers contained in the first laminated structure nearest to the surface of the coating layer.

15 . The coated tool according to claim 14 , wherein:
a ratio of TC 2 to TD 2 is 5% or more and 70% or less, TC 2 being an average thickness of the layers contained in the second laminated structure nearest to the substrate; and TB 2 being an average thickness of the layers contained in the second laminated structure nearest to the surface of the coating layer.

16 . The coated tool according to claim 15 , wherein:
the layers contained in the first laminated structure and the layers contained in the second laminated structure contain a compound comprising:
at least two metal elements selected from the group consisting of Ti, Nb, Ta, Cr, W, Al, Si, Sr and Y, and
at least one non-metal element selected from the group consisting of carbon, nitrogen, oxygen and boron.

17 . The coated tool according to claim 1 , wherein:
an average thickness of a first laminated structure closest to the substrate is thinner than an average thickness of a first laminated structure farther from the substrate; an average thickness of a second laminated structure closest to the substrate is thinner than an average thickness of a second laminated structure farther from the substrate. at least three first laminated structures and at least three second laminated structure are laminated alternately; the total number of layers in each of the first laminated structures increases, with increasing distance from the substrate; the total number of layers in each of the second laminated structures increases, with increasing distance from the substrate; and the total number of layers in any of first laminated structures is less than the total number of layers in any of the second laminated structures.

18 . A coated tool which comprises
a substrate, and a coating layer formed onto a surface of the substrate, wherein the coating layer contains a first laminated structure and a second laminated structure, the first laminated structure and the second laminated structure are laminated alternately and continuously twice or more, the first laminated structure contains at least two kinds of layers having different compositions, and the two kinds of the layers are alternately laminated twice or more, an average thickness of the layers contained in the first laminated structure is 60 nm or more and 500 nm or less, the second laminated structure contains at least two kinds of laye

Assignees

• Tungaloy Corp

Inventors

• Hirano Yusuke
• Metoki Kenji

Classifications

• B23B27/14

  Cutting tools of which the bits or tips {or cutting inserts} are of special material · CPC title

• B23B51/00

  Tools for drilling machines · CPC title

• C23C30/005

  on hard metal substrates · CPC title

• C23C28/044

  coatings specially adapted for cutting tools or wear applications · CPC title

• C23C28/44

  characterized by a measurable physical property of the alternating layer or system, e.g. thickness, density, hardness · CPC title