US4427446A
Expired / Lapsed
US
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Corrosion-resistant and abrasive wear-resistant composite material for centrifugally cast linings
Assignee: Japan Steel Works Ltd
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Filing: 1981-04-13
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Granted: 1984-01-24
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Expires: 2001-04-13
Abstract
Abstract A corrosion- and abrasive wear-resistant composite material for use in centrifugally cast linings composed of a matrix of a metal having corrosion-resistance and an abrasive wear-resistant reinforcing material dispersed as particles in the matrix. The reinforcing material has a higher hardness and a smaller specific density than the matrix.
Inventors
- 👤 Tsuyoshi Miura
- 👤 Yutaka Arakida
- 👤 Yoshikazu Kondo
- 👤 Tsuneyuki Ide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C22; C22C; C22C1/00; C22C1/10; C22C1/1036; C22C32/00; C22C32/0047; C22C32/0073; B; B22; B22F; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
271 words
A corrosion-resistant and abrasive wear-resistant composite material lining for a substrate, said lining formed by centrifugal casting and comprising a metal matrix and reinforcing materials, said matrix selected from the group consisting of a Ni-based self-fluxing alloy and a Co-based self-fluxing alloy, wherein said Ni-based self-fluxing alloy consists of 0.5-4.0% by weight of B 1.0-5.0% by weight of Si, 0.2-1.0% by weight of C, up to 16% by weight of Cr, up to 4% by weight of Fe, and the remainder Ni and wherein said Co-based self-fluxing alloy consists of 0.5-4.0% by weight of B, 1.0-5.0% by weight of Si, 4.0-12% by weight of W, 0.2-1.0% by weight of C, up to 16% by weight of Cr, up to 12% by weight of Ni and the remainder Co; said reinforcing material is selected from the group consisting of chromium boride, iron boride and composite boride wherein said composite boride comprises 3-20% by weight of B, less than 3% by weight of Al, less than 5% by weight of Si, less than 2.5% by weight of oxygen, less than 2.0% by weight of C and at least one metal selected from the group consisting of Cr, Mo, W, Ti, V, Mb, Ta, Hf, Zr, Co, Mi and Mn in the following amounts 0.5-35% by weight of Cr, 0.5-35% by weight of Mo, 1-30% by weight of W and less than 15% by weight of each of Ti, V, Mb, Ta, Hf, Zr, Co, Ni and Mn; the balance being at least 20% by weight of Fe; wherein said reinforcing material substantially congregates at the surface of the lining distant from the substrate.
Claim 2
Dependent Claim
271 words
A corrosion-resistant and abrasive wear-resistant composite material lining for a substrate, said lining formed by centrifugal casting and comprising a metal matrix and reinforcing materials, said matrix selected from the group consisting of a Ni-based self-fluxing alloy and a Co-based self-fluxing alloy, wherein said Ni-based self-fluxing alloy consists of 0.5-4.0% by weight of B 1.0-5.0% by weight of Si, 0.2-1.0% by weight of C, up to 16% by weight of Cr, up to 4% by weight of Fe, and the remainder Ni and wherein said Co-based self-fluxing alloy consists of 0.5-4.0% by weight of B, 1.0-5.0% by weight of Si, 4.0-12% by weight of W, 0.2-1.0% by weight of C, up to 16% by weight of Cr, up to 12% by weight of Ni and the remainder Co; said reinforcing material is selected from the group consisting of chromium boride, iron boride and composite boride wherein said composite boride comprises 3-20% by weight of B, less than 3% by weight of Al, less than 5% by weight of Si, less than 2.5% by weight of oxygen, less than 2.0% by weight of C and at least one metal selected from the group consisting of Cr, Mo, W, Ti, V, Mb, Ta, Hf, Zr, Co, Mi and Mn in the following amounts 0.5-35% by weight of Cr, 0.5-35% by weight of Mo, 1-30% by weight of W and less than 15% by weight of each of Ti, V, Mb, Ta, Hf, Zr, Co, Ni and Mn; the balance being at least 20% by weight of Fe; wherein said reinforcing material substantially congregates at the surface of the lining distant from the substrate.
Claim 3
Dependent Claim
16 words
The composite material lining as claimed in claim 1, wherein said reinforcing material is composite boride.
Claim 4
Dependent Claim
31 words
The composite material lining as claimed in claim 2, wherein said composite boride comprises from 0.5 to 35% by weight of Cr to improve the corrosion resistance of the composite material.
Claim 5
Dependent Claim
16 words
The composite material lining as claimed in claim 1, wherein said reinforcing material is chromium boride.
Claim 6
Dependent Claim
23 words
The composite material lining as claimed in claim 4, wherein said chromium boride consists of CrB, Cr 2 B or a combination thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |