Low carbon high strength steel
Abstract
Abstract LOW CARBON STEELS HAVING HIGH STRENGTH, E.G. FOR STRUCTURAL PLATE, COMPRISE MOLYBDENUM AND/OR BORON AS AN INGREDIENT COATING TO AVOID FERRITE-PEARLITE TRANFORMATION AND A SECOND INGREDIENT, IN ECONOMICAL AMOUNT, OF ELEMENTS FROM THE CLASS OF MANGANESE, NICKEL, CHROMIUM ABND COPPER COATING TO RAISE THE LEVELS OF BOTH STRENGTH AND TOUGHNESS SILULTANEOUSLY WHILE AFFORDING TRANSFORMATION IN THE BAINITE REGION, SUCH TRANSFORMATION BEING THEREBY PREFERABLY INITIATED AT A LOW TEMPERATURE, SO THAT UPON COOLING THE PRODUCT DIRECTLY FROM A HOT ROLLING OPERATION, E.G. BY AIR COOLING, THE STEEL TRANSFORMS TO A MICROSTRUCTURE EXHIVITING A PLATE-LIKE MORPHOLOGY AND HAVING YIELD STRENGTH OF AT LEAST ABOUT 95 K.S.I. AND GOOD IMPACT TOUGHNESS, NEED FOR HEAT TREATMENT, SUCH AS IN TEMPERING AFTER QUENCHING, IS OBVIATED. PROPERTIES CAN BE FURTHER ENHANCED BY A MINOR AMOUNT OF A THIRD INGREDIENT, FOR EXAMPLE COLUMBIUM, WHICH COOPERATES IN ATAINING DESIRED RESULTS.
Inventors
- 👤 J Ballance
- 👤 S Matas
- 👤 K Kundig
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |