Patent US5296016A successfully refreshed from Google Patents.
US5296016A
Expired / Lapsed
US
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Surface coated cermet blade member
Assignee: Mitsubishi Materials Corp
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Filing: 1991-09-17
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Granted: 1994-03-22
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Expires: 2011-09-17
Abstract
Abstract There is disclosed a surface coated cermet blade member which includes a cermet substrate and a hard coating of an average thickness of 0.5 to 20 μm formed thereon. The substrate contains, apart from unavoidable impurities, a binder phase of 5 to 30% by weight of at least one of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals. The metals are titanium, tungsten and at least one of tantalum, niobium, vanadium, zirconium, molybdenum and chromium. The substrate includes a surface portion having a hardness greater than an interior portion. The hard coating may be composed of one or more coating layers. Each coating layer is formed of TiX or Al 2 O 3 , where X denotes at least one element of carbon, nitrogen, oxygen and boron.
Inventors
- 👤 Hironori Yoshimura
- 👤 Seiichirou Nakamura
- 👤 Niro Odani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:25
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C28/00; C23C28/04; C23C28/044; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
244 words
A surface coated cermet blade member comprising: a substrate of cermet which consists, apart from unavoidable impurities, of a binder phase of 5 to 30% by weight of at least one element selected from the group consisting of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals, said metals being titanium, tungsten and at least one additional metal selected from the group consisting of tantalum, niobium, vanadium, zirconium, molybdenum and chromium, said substrate including a surface portion and an interior portion, said surface portion having a depth of less than 1 mm from a surface thereof, said surface portion further consisting of a binder phase enriched layer of less than 10 μm depth from said surface and a hard dispersed phase enriched layer; said binder phase enriched layer including said binder phase at higher concentration than that of said interior portion, said hard dispersed phase enriched layer including said binder phase in lower concentration than that of said interior portion, said hard dispersed phase enriched layer having greater hardness than said interior portion; and a hard coating of an average thickness of 0.5 to 10 μm deposited on said substrate, said hard coating being composed of at least one coating layer formed of a coating compound selected from the group consisting of TiX and Al 2 O 3 , where X denotes at least one element selected from the group consisting of carbon, nitrogen, oxygen and boron.
Claim 2
Dependent Claim
244 words
A surface coated cermet blade member comprising: a substrate of cermet which consists, apart from unavoidable impurities, of a binder phase of 5 to 30% by weight of at least one element selected from the group consisting of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals, said metals being titanium, tungsten and at least one additional metal selected from the group consisting of tantalum, niobium, vanadium, zirconium, molybdenum and chromium, said substrate including a surface portion and an interior portion, said surface portion having a depth of less than 1 mm from a surface thereof, said surface portion further consisting of a binder phase enriched layer of less than 10 μm depth from said surface and a hard dispersed phase enriched layer; said binder phase enriched layer including said binder phase at higher concentration than that of said interior portion, said hard dispersed phase enriched layer including said binder phase in lower concentration than that of said interior portion, said hard dispersed phase enriched layer having greater hardness than said interior portion; and a hard coating of an average thickness of 0.5 to 10 μm deposited on said substrate, said hard coating being composed of at least one coating layer formed of a coating compound selected from the group consisting of TiX and Al 2 O 3 , where X denotes at least one element selected from the group consisting of carbon, nitrogen, oxygen and boron.
Claim 3
Dependent Claim
27 words
A surface coated blade member according to claim 1, wherein said binder phase is present in said substrate in an amount from 10 to 20% by weight.
Claim 4
Dependent Claim
30 words
A surface coated blade member according to claim 1, in which said binder phase is composed of at least one element selected from the group consisting of cobalt and nickel.
Claim 5
Dependent Claim
27 words
A surface coated blade member according to claim 3, wherein said binder phase is present in said substrate in an amount from 10 to 20% by weight.
Claim 6
Dependent Claim
41 words
A surface coated blade member according to claim 1, wherein said binder phase enriched layer includes a surface consisting essentially of said binder phase, with a thickness of 0.5 to 3 μm, which is exuded on said surface of said substrate.
Claim 7
Dependent Claim
29 words
A surface coated blade member according to claim 1, said surface portion of said substrate includes a hard dispersed phase consisting essentially of core structures free from surrounding structures.
Claim 8
Dependent Claim
34 words
A surface coated blade member according to claim 1, in which maximum Vickers hardness in said surface portion is no less than 2000 while Vickers hardness in said interior portion is less than 2000.
Claim 9
Dependent Claim
31 words
A surface coated blade member according to claim 1, in which the hardness of said substrate is greatest at a depth of 100 μm from said surface of said surface portion.
Claim 10
Dependent Claim
53 words
A surface coated blade member according to claim 1, wherein said substrate has a rake surface, said binder phase enriched layer in said rake surface being ground prior to said deposition of said hard coating, and said hard coating being deposited directly on said hard dispersed phase enriched layer in said rake surface.
Claim 11
Dependent Claim
50 words
A surface coated blade member according to claim 1, wherein said substrate has a flank, said binder phase enriched layer in said flank being ground prior to said deposition of said hard coating, and said hard coating being deposited directly on said hard dispersed phase enriched layer in said flank.
Claim 12
Dependent Claim
42 words
A surface coated blade member according to claim 1, in which said at least one coating layer of said hard coating is a chemical vapor deposited layer of at least one compound selected from the group consisting of (TiC, TiN and TiCN).
Claim 13
Dependent Claim
42 words
A surface coated blade member according to claim 1, in which said at least one coating layer of said hard coating is a physical vapor deposited layer of at least one compound selected from the group consisting of (TiC, TiN and TiCN).
Claim 14
Dependent Claim
35 words
A surface coated blade member according to claim 12, in which said hard coating is composed of a plurality of said at least one coating layers, the layer adjacent said substrate being formed of titanium.
Claim 15
Dependent Claim
20 words
A surface coated blade member according to claim 12, in which said hard coating further includes a (Ti,Al)N coating layer.
Claim 16
Dependent Claim
24 words
A surface coated blade member according to claim 1, in which the average thickness of said hard coating is from 2 to 10 μm.
Claim 17
Dependent Claim
24 words
A surface coating blade member according to claim 11, in which the average thickness of said hard coating is from 2 to 10 μm.
Claim 18
Dependent Claim
24 words
A surface coated blade member according to claim 12, in which the average thickness of said hard coating is from 2 to 10 μm.
Claim 19
Dependent Claim
222 words
A surface coated cermet blade member comprising: a substrate of cermet which consists, apart from unavoidable impurities, of a binder phase of 5 to 30% by weight of at least one element selected from the group consisting of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals, said metals being titanium, tungsten and at least one additional metal selected from the group consisting of tantalum, niobium, vanadium, zirconium, molybdenum and chromium, said substrate including a surface portion and an interior portion, said surface portion having a depth of less than 1 mm from a surface thereof, and an interior portion, said surface portion consisting of a hard dispersed phase enriched layer including said binder phase at a lower concentration than said interior portion and a hard dispersed phase at a higher concentration than that of said interior portion, said hard dispersed phase enriched layer having greater hardness than said interior portion; and a hard coating of an average thickness of 0.5 to 20 μm deposited on said substrate, said hard coating being composed of at least one coating layer formed of a coating compound selected from the group consisting of TiX and Al 2 O 3 , where X denotes at least one element selected from the group consisting of carbon, nitrogen, oxygen and boron.
Claim 20
Dependent Claim
222 words
A surface coated cermet blade member comprising: a substrate of cermet which consists, apart from unavoidable impurities, of a binder phase of 5 to 30% by weight of at least one element selected from the group consisting of cobalt, nickel, iron and aluminum, and a hard dispersed phase of a balance carbo-nitride of metals, said metals being titanium, tungsten and at least one additional metal selected from the group consisting of tantalum, niobium, vanadium, zirconium, molybdenum and chromium, said substrate including a surface portion and an interior portion, said surface portion having a depth of less than 1 mm from a surface thereof, and an interior portion, said surface portion consisting of a hard dispersed phase enriched layer including said binder phase at a lower concentration than said interior portion and a hard dispersed phase at a higher concentration than that of said interior portion, said hard dispersed phase enriched layer having greater hardness than said interior portion; and a hard coating of an average thickness of 0.5 to 20 μm deposited on said substrate, said hard coating being composed of at least one coating layer formed of a coating compound selected from the group consisting of TiX and Al 2 O 3 , where X denotes at least one element selected from the group consisting of carbon, nitrogen, oxygen and boron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |