Method of preparing deoxidized steel
Abstract
Abstract AN ADDITION AGENT IS PROVIDED FOR DEOXIDIZING AND RECARBURIZING VACUUM DEGASSED STEEL WHICH CONSISTS ESSENTIALLY OF CARBON, ALUMINUM AND/OR SILICON, MANGANESE AND IRON, AND A BINDER THEREFOR WHEN IN THE FORM OF BRIQUETTES. THE INVENTION ALSO PROVIDES A NOVEL METHOD OF DEOXIDIZING AND RECARBURIZING VACUUM DEGASSED STEEL WHICH UTILIZES THE ADDITION AGENT OF THE INVENTION. IN ONE VARIANT OF THE INVENTION, A MELT OF STEEL PREPARED BY A BASIC OXYGEN PROCESS IS VACUUM DEGASSED AND THEN DEOXIDIZED AND RECARBURIZED WITH THE ADDITION AGENT OF THE INVENTION TO PRODUCE MOLTEN KILLED STEEL HAVING AN ULTRA LOW OXYGEN CONTENT WHICH MAY BE CONTINUOUSLY CAST TO PRODUCE STEEL SHAPES WITH PROPERTIES SIMILAR TO RIMMED STEEL.
Inventors
- 👤 Robert S Miltenberger
Bibliographic Details
Claims Analysis
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |