BAINITIC STEELS WITH BORON

PROBLEM TO BE SOLVED: To provide bainitic steels with boron and to provide seamless pipes formed from the steel.SOLUTION: Steel compositions containing micro-alloying additions of boron and titanium, exhibit yield strength of at least 100 ksi (690 MPa), excellent toughness and good weldability, Boro...

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Bibliographische Detailangaben
Hauptverfasser:	GOMEZ GONZALO ROBERTO, PEREZ TERESA ESTELA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide bainitic steels with boron and to provide seamless pipes formed from the steel.SOLUTION: Steel compositions containing micro-alloying additions of boron and titanium, exhibit yield strength of at least 100 ksi (690 MPa), excellent toughness and good weldability, Boron additions are used to increase hardenability. Strong nitride formers such as titanium may be added to the steel compositions in order to prevent born nitrides from forming in the steel compositions. The compositions may be cooled from hot rolling in air or using accelerated cooling. After air cooling, the compositions may be quenched or quenched and tempered. The compositions are suitable for high strength line pipes (for example, X100 in API5L standard) and other applications.