US4119459A
Expired / Lapsed
US
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Composite body consisting of cemented carbide and cast alloy
Assignee: Santrade Ltd
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Filing: 1977-02-01
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Granted: 1978-10-10
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Expires: 1997-02-01
Abstract
Abstract A metallic body in which great wear resistance is coupled with excellent mechanical strength and toughness is composed of sintered cemented carbide particles in a matrix of graphitic cast iron-base alloy, the content of carbon plus other constituents known to be equivalent to carbon in their influence on the cast iron amounts to 2.5 - 6.0%, preferably 3.5 - 5.0%.
Inventors
- 👤 Sven Karl Gustav Ekemar
- 👤 Udo Karl Reinhold Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:11
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C; C22; C22C; C22C37/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
Metallic body having great wear resistance in combination with excellent mechanical strength and toughness, the body being composed of sintered cemented carbide and of cast iron-base alloy, the sintered cemented carbide being bonded within the cast alloy in the form of pieces, crushed parts, powder or pressed bodies, characterized in that the cast alloy is an essentially graphitic cast iron having per se low wear resistance and hardness, its composition being so adjusted that the carbon equivalent is from 2.5 to 6.0 weight percent.
Claim 2
Dependent Claim
84 words
Metallic body having great wear resistance in combination with excellent mechanical strength and toughness, the body being composed of sintered cemented carbide and of cast iron-base alloy, the sintered cemented carbide being bonded within the cast alloy in the form of pieces, crushed parts, powder or pressed bodies, characterized in that the cast alloy is an essentially graphitic cast iron having per se low wear resistance and hardness, its composition being so adjusted that the carbon equivalent is from 2.5 to 6.0 weight percent.
Claim 3
Dependent Claim
19 words
Metallic body according to claim 1, wherein the carbon equivalent of the cast iron is at the lowest 4.0.
Claim 4
Dependent Claim
35 words
Metallic body according to claim 1, in which there is an intermediate alloying phase or transition zone between the cemented carbide the cast alloy, 20-80% of the cemented carbide being part of said transition zone.
Claim 5
Dependent Claim
17 words
Metallic body according to claim 1, wherein the carbon equivalent is from 3.5 to 5.0 weight percent.
Claim 6
Dependent Claim
20 words
Metallic body according to claim 1 wherein 30 to 70% of the cemented carbide is part of said transition zone.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |