US6586122B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer-coated cutting tool
Assignee: Moldino Tool Engineering Ltd
•
Filing: 2001-07-13
•
Granted: 2003-07-01
•
Expires: 2021-07-13
Abstract
Abstract A multilayer-coated cutting tool comprising a cutting tool substrate, and a multilayer coating film comprising a first hard coating film formed on the substrate and a second hard coating film formed on the first hard coating film, the first hard coating film comprising one or more metallic elements selected from the group consisting of Ti, Al and Cr, and one or more non-metallic elements selected from the group consisting of N, B, C and O; and the second hard coating film comprising Si and one or more metallic elements selected from the group consisting of metallic elements of Groups 4a, 5a and 6a of the Periodic Table and Al, and one or more non-metallic elements selected from the group consisting of N, B, C and O; the second hard coating film being a composition-segregated polycrystalline film comprising a phase having a relatively high Si concentration and a phase having a relatively low Si concentration.
Inventors
- 👤 Takeshi Ishikawa
- 👤 Nobuhiko Shima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:18
CPC Classifications
C; C23; C23C; C23C30/00; C23C30/005; C23C14/00; C23C14/06; C23C14/0641; C23C14/0664; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
157 words
A multilayer-coated cutting tool comprising a cutting tool substrate, and a multilayer coating film comprising a first hard coating film formed on said substrate and a second hard coating film formed on said first hard coating film, said first hard coating film comprising one or more metallic elements selected from the group consisting of Ti, Al and Cr, and one or more non-metallic elements selected from the group consisting of N, B, C and O; and said second hard coating film comprising Si and one or more metallic elements selected from the group consisting of metallic elements of Groups 4 a, 5 a and 6 a of the Periodic Table and Al, and one or more non-metallic elements selected from the group consisting of N, B, C and O; said second hard coating film being a composition-segregated polycrystalline film comprising a phase having a relatively high Si concentration and a phase having a relatively low Si concentration.
Claim 2
Dependent Claim
157 words
A multilayer-coated cutting tool comprising a cutting tool substrate, and a multilayer coating film comprising a first hard coating film formed on said substrate and a second hard coating film formed on said first hard coating film, said first hard coating film comprising one or more metallic elements selected from the group consisting of Ti, Al and Cr, and one or more non-metallic elements selected from the group consisting of N, B, C and O; and said second hard coating film comprising Si and one or more metallic elements selected from the group consisting of metallic elements of Groups 4 a, 5 a and 6 a of the Periodic Table and Al, and one or more non-metallic elements selected from the group consisting of N, B, C and O; said second hard coating film being a composition-segregated polycrystalline film comprising a phase having a relatively high Si concentration and a phase having a relatively low Si concentration.
Claim 3
Dependent Claim
26 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film has an average grain size of not more than 50 nm.
Claim 4
Dependent Claim
30 words
The multilayer-coated cutting tool according to claim 1 , wherein said phase having a relatively high Si concentration constitutes an amorphous or microcrystalline phase in said second hard coating film.
Claim 5
Dependent Claim
26 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film comprises Si 3 N 4 and/or Si as a single phase.
Claim 6
Dependent Claim
22 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film contains Cr and Si as metallic elements.
Claim 7
Dependent Claim
22 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film contains Ti and Si as metallic elements.
Claim 8
Dependent Claim
24 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film contains boron in the form of a boron nitride.
Claim 9
Dependent Claim
44 words
The multilayer-coated cutting tool according to claim 1 , wherein said second hard coating film is a multilayer coating film comprising at least two or more of a CrSiN layer, a (CrSi) 2 N layer, a CrSiBN layer, and a (CrSi) 2 BN layer.
Claim 10
Dependent Claim
22 words
The multilayer-coated cutting tool according to claim 1 , wherein said first hard coating film contains Ti and Al as metallic elements.
Claim 11
Dependent Claim
22 words
The multilayer-coated cutting tool according to claim 1 , wherein said first hard coating film contains Cr and Al as metallic elements.
Claim 12
Dependent Claim
49 words
The multilayer-coated cutting tool according to claim 1 , wherein said first hard coating film comprises Al partially replaced by at least one element selected from the group consisting of Si, Mg, Ca, Sr, Li, K and Y in a range of 0.5 atomic % to 30 atomic %.
Claim 13
Dependent Claim
27 words
The multilayer-coated cutting tool according to claim 1 , wherein both of said first and second hard coating films are formed by an arc discharge ion-plating method.
Claim 14
Dependent Claim
23 words
The multilayer-coated cutting tool according to claim 12 , wherein both of said first and second hard coating films inevitably contain droplet particles.
Claim 15
Dependent Claim
21 words
The multilayer-coated cutting tool according to claim 1 , wherein said cutting tool substrate is an end mill of cemented carbide.
Claim 16
Dependent Claim
20 words
The multilayer-coated cutting tool according to claim 1 , wherein said cutting tool substrate is an insert of cemented carbide.
Claim 17
Dependent Claim
30 words
The multilayer-coated cutting tool according to claim 2 , wherein said phase having a relatively high Si concentration constitutes an amorphous or microcrystalline phase in said second hard coating film.
References Cited (Backward Citations)
US5182238A
Cited
JPH07310174A
Cited
US5580653A
Cited
JPH08118106A
Cited
US5882778A
Cited
JPH0911004A
Cited
US6231969B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-06-30 | 2006-12-30 | 2007-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-30 | 2010-12-30 | 2011-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-30 | 2014-12-30 | 2015-07-01 | $7700.00 | Window Closed / Lapsed |