OIL TEMPERED WIRE AND MANUFACTURING METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide an oil tempered wire having both of high fatigue strength and toughness after having been nitrided; a manufacturing method therefor; and a spring using the oil tempered wire. SOLUTION: The oil tempered wire has a tempered martensite structure. When the oil tempered w...

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Hauptverfasser:	KAWABE NOZOMI, YAMAO NORITO, FUJINO YOSHIRO, SHIAKU TAKASHI, MURAI TERUYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BLASTING CHEMISTRY ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SHOCK-ABSORBERS SPRINGS THERMAL INSULATION IN GENERAL TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an oil tempered wire having both of high fatigue strength and toughness after having been nitrided; a manufacturing method therefor; and a spring using the oil tempered wire. SOLUTION: The oil tempered wire has a tempered martensite structure. When the oil tempered wire is nitrided, the nitrided layer formed on the surface of the wire has a lattice constant between 2.870 and 2.890 . The oil tempered wire is manufactured by the steps of: drawing a steel wire; quenching it; and tempering it. In the above steps, the steel wire is quenched after having been heated in an atmosphere between 850 and 950°C for 30 sec to 150 sec, and is tempered at 400 to 600°C. COPYRIGHT: (C)2007,JPO&INPIT