US3970445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant alloy, and method of making same
Assignee: Caterpillar Inc
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Filing: 1974-05-02
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Granted: 1976-07-20
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Expires: 1994-05-02
Abstract
Abstract A wear-resistant alloy comprising boron, chromium and iron having maximum hardness for a given composition is produced by rapidly cooling and solidfying spheroidal particles of the molten alloy mixture. The resultant solid particles are then cast in the desired form, or incorporated into a composite alloy wherein the solid particles are held together with a matrix of different material from the alloy.
Inventors
- 👤 Preston L. Gale
- 👤 Eugene L. Helton
- 👤 Robert C. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/06; C22C38/00; C22C38/18; C22C38/32; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A method for improving the hardness characteristics of an alloy consisting essentially of about 25 to about 61% by weight chromium, about 6 to about 12% by weight boron, and the balance iron comprising the steps of producing cast spheroidal particles thereof by streaming the molten alloy onto a hard surface thus breaking up the molten alloy into droplets and thereafter rapidly quenching and solidifying the molten alloy with a quench liquid while still in the droplet configuration.
Claim 2
Independent Claim
78 words
A method for improving the hardness characteristics of an alloy consisting essentially of about 25 to about 61% by weight chromium, about 6 to about 12% by weight boron, and the balance iron comprising the steps of producing cast spheroidal particles thereof by streaming the molten alloy onto a hard surface thus breaking up the molten alloy into droplets and thereafter rapidly quenching and solidifying the molten alloy with a quench liquid while still in the droplet configuration.
Claim 3
Independent Claim
84 words
A method for improving the hardness characteristics of an alloy consisting essentially of about 61 to about 70% by weight chromium, about 6 to about 12% by weight boron, about 0.05 to about 2% carbon, and the balance iron comprising the steps of producing cast spheroidal particles thereof by streaming the molten alloy onto a hard surface thus breaking up the molten alloy into droplets and thereafter rapidly quenching and solidifying the molten alloy with a quench liquid while still in the droplet configuration.
Claim 4
Independent Claim
84 words
A method for improving the hardness characteristics of an alloy consisting essentially of about 61 to about 70% by weight chromium, about 6 to about 12% by weight boron, about 0.05 to about 2% carbon, and the balance iron comprising the steps of producing cast spheroidal particles thereof by streaming the molten alloy onto a hard surface thus breaking up the molten alloy into droplets and thereafter rapidly quenching and solidifying the molten alloy with a quench liquid while still in the droplet configuration.
Claim 5
Dependent Claim
37 words
A wear-resistant alloy comprising about 61 to about 70% by weight chromium, about 6 to about 12% by weight boron, about 0.05 to about 2% carbon, and the balance iron in the form of cast spheroidal particles.
Claim 6
Dependent Claim
37 words
A wear-resistant alloy comprising about 61 to about 70% by weight chromium, about 6 to about 12% by weight boron, about 0.05 to about 2% carbon, and the balance iron in the form of cast spheroidal particles.
Claim 7
Dependent Claim
50 words
A wear-resistant alloy consisting essentially of about 25 to about 61% by weight chromium, about 6 to about 12% by weight boron, and the balance iron, in the form of cast spheroidal particles having a Knoop hardness at least about 200 Kg/mm 2 greater than said alloy in ingot form.
Claim 8
Dependent Claim
50 words
A wear-resistant alloy consisting essentially of about 25 to about 61% by weight chromium, about 6 to about 12% by weight boron, and the balance iron, in the form of cast spheroidal particles having a Knoop hardness at least about 200 Kg/mm 2 greater than said alloy in ingot form.
References Cited (Backward Citations)
SU273640A1
Cited
US2567121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |