US4089466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining alloy for bimetallic cylinders
Assignee: Individual
•
Filing: 1977-03-30
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Granted: 1978-05-16
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Expires: 1997-03-30
Abstract
Abstract A wear and corrosion resistant alloy for lining cylinders used in extrusion and injection molding machines comprises tantalum carbide admixed with a nickel-cobalt base alloy. The cylinder lining is preferably prepared by placing a quantity of the alloy in the cylinder and capping the ends of the cylinder. The cylinder is then heated above the melting point of the alloy and spun at a high rate of speed to centrifugally coat the inner surface of the cylinder. The cylinder's end caps are then removed and the lining finished to the correct internal diameter and finish by conventional lath and hone means. The tantalum carbide added to the base alloy has an affinity for carbon and tends to reduce the free carbon in the final matrix producing a lining which has desirable hardness and corrosion resistance throughout the thickness of the lining.
Inventors
- 👤 Donald P. Lomax
- 👤 Ronald M. Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:03
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/58; B29C45/62; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/6801; C22; C22C; C22C32/00; C22C32/0047; C22C32/0052; B29C48/03; Y; Y10; Y10S; Y10S220/00; Y10S220/917; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12937
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A hard, wear and corrosion resistent alloy consisting essentially of the following materials fused together in the weight percentage composition stated below: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.16 to 0.35
Nickel 28.50 to 34.60
Manganese 0.34 to 0.75
Silicon 0.75 to 1.90
Cromium 4.50 to 7.50
Boron 2.25 to 2.90
Cobalt 28.50 to 42.00
Tantalum Carbide 10.00 to 35.00
______________________________________
Claim 2
Dependent Claim
61 words
A hard, wear and corrosion resistent alloy consisting essentially of the following materials fused together in the weight percentage composition stated below: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.16 to 0.35
Nickel 28.50 to 34.60
Manganese 0.34 to 0.75
Silicon 0.75 to 1.90
Cromium 4.50 to 7.50
Boron 2.25 to 2.90
Cobalt 28.50 to 42.00
Tantalum Carbide 10.00 to 35.00
______________________________________
Claim 3
Dependent Claim
35 words
The alloy according to claim 1 wherein the proportions are as follows: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.25
Nickel 30.40
Manganese 0.55
Silicon 1.10
Cromium 6.30
Boron 2.40
Cobalt 34.00
Tantalum Carbide
25.00.
______________________________________
Claim 4
Dependent Claim
69 words
In combination, a steel cylinder having a lining consisting of a hard, wear and corrosion resistant alloy consisting essentially of the following materials in the weight percentage composition stated below: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.16 to 0.35
Nickel 28.50 to 34.60
Manganese 0.34 to 0.75
Silicon 0.75 to 1.90
Cromium 4.50 to 7.50
Boron 2.25 to 2.90
Cobalt 28.50 to 42.00
Tantalum Carbide 10.00 to 35.00
______________________________________
Claim 5
Dependent Claim
69 words
In combination, a steel cylinder having a lining consisting of a hard, wear and corrosion resistant alloy consisting essentially of the following materials in the weight percentage composition stated below: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.16 to 0.35
Nickel 28.50 to 34.60
Manganese 0.34 to 0.75
Silicon 0.75 to 1.90
Cromium 4.50 to 7.50
Boron 2.25 to 2.90
Cobalt 28.50 to 42.00
Tantalum Carbide 10.00 to 35.00
______________________________________
Claim 6
Dependent Claim
37 words
The invention set forth in claim 3 wherein said alloy has the following composition: ______________________________________
Ingredient Weight Percent
______________________________________
Carbon 0.25
Nickel 30.40
Manganese 0.55
Silicon 1.10
Cromium 6.30
Boron 2.40
Cobalt 34.00
Tantalum Carbide
25.00.
______________________________________
Claim 7
Dependent Claim
16 words
The invention of claim 3 wherein said lining is a centrifugally cast lining of said alloy.
Claim 8
Dependent Claim
21 words
The invention of claim 3 wherein the concentration of tantalum carbide is substantially constant throughout the thickness of said alloy lining.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |