High-strength four phase steel alloys

A carbon steel alloy that exhibits the combined properties of high strength, ductility, and corrosion resistance is one whose microstructure contains ferrite regions combined with martensite-austenite regions, with carbide precipitates dispersed in the ferrite regions but without carbide precipitate...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KUSINSKI, GRZEGORZ J, THOMAS, GARETH
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A carbon steel alloy that exhibits the combined properties of high strength, ductility, and corrosion resistance is one whose microstructure contains ferrite regions combined with martensite-austenite regions, with carbide precipitates dispersed in the ferrite regions but without carbide precipitates are any of the interfaces between different phases. The microstructure thus contains of four distinct phases: ( 1 ) martensite laths separated by ( 2 ) thin films of retained austenite, plus ( 3 ) ferrite regions containing ( 4 ) carbide precipitates. In certain embodiments, the microstructure further contains carbide-free ferrite regions.