OIL TEMPERED STEEL WIRE FOR SPRING AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To produce oil tempered steel wire for a spring having high-strength and high toughness and to provide a method for producing it. SOLUTION: This steel wire is the one contg., by weight, 0.5 to 0.9% C, 0.8 to 3.0% Si, 0.4 to 1.0% Mn and 0.4 to 1.0% Cr and subjected to quenching...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAO NORITO, SHIAKU TAKASHI, MURAI TERUYUKI
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:	PROBLEM TO BE SOLVED: To produce oil tempered steel wire for a spring having high-strength and high toughness and to provide a method for producing it. SOLUTION: This steel wire is the one contg., by weight, 0.5 to 0.9% C, 0.8 to 3.0% Si, 0.4 to 1.0% Mn and 0.4 to 1.0% Cr and subjected to quenching and tempering treatment, and in which the content of untempered martensite produced in the process of cooling after the tempering from a part of residual austenite formed at the time of the quenching is regulated to