Heat-treatment of steels
Abstract
Abstract A process for treating wrought steel containing up to 0.10 percent carbon, 0.0-0.5 percent Mn, 0.0-0.05 percent P, o.0-0.05 percent S, 0.0-0.005 percent N2 and 0.0-0.1 percent A1, comprises heating said wrought steel to a temperature above the austenitization point but below the melting point of the steel and quenching said heated wrought steel at a selected cooling rate ranging from 100* C./sec. to 500* C./sec. to below transformation temperature range, said selected cooling rate providing in the treated wrought steel a tensile strength having an essentially consistent value for any selected carbon content in said wrought steel up to about 0.10 percent carbon, and said essentially consistent tensile strength value being independent of the carbon content in said wrought steel up to about 0.10 percent carbon.
Inventors
- 👤 Sidney Garber
- 👤 Kenneth John Albutt
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |