High-strength plain carbon steels having improved formability
Abstract
Abstract FULLY KILLED HIGH-STRENGTH PLAIN CARBON STEELS CONSISTING ESSENTIALLY OF .06% TO .20% CARBON, .4% TO 1.2% MANGANESE, .005% TO .3% SILICON, .04% MAXIMUM SULFUR, .04% MAXIMUM PHOSPHORUS, AN INCLUSION SHAPE CONTROL AGENT COMPRISING .05% TO .20% ZIRCONIUM, OR .01% TO .10% OF RARE EARTHS OR .01% TO .10% MISCHMETAL, BALANCE IRON ARE CHARACTERIZED IN A HOT-ROLLED FINISHED CONDITION BY A YEILD STRENGTH IN EXCESS OF 35,000 P.S.I., AN ULTIMATE TENSILE STRENGTH IN EXCESS OF 55,000 P.S.I., DUCTILITY AS MEASURED BY PERCENT ELONGATION (2 INCHES) IN EXCESS OF 30%, GOOD TOUGHNESS AND SUPERIOR FORMABILITY. THE STEELS ARE HOTROLLED FINISHED IN THE TEMPERATURE RANGE 1550*F. TO 1650* F., COOLED AT A RATE WITHIN THE TEMPERATURE RANGE 20*F. TO 135*F. PER SECOND AND COLLECTED BY COILING OR PILING WITHIN A TEMPERATURE RANGE OF 900*F. TO 1200*F., PREFERABLY BETWEEN 1025*F. TO 1175*F.
Inventors
- 👤 Michael Korchynsky
- 👤 John David Grozier
- 👤 John L Mihelich
Bibliographic Details
Claims Analysis
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