SPRING STEEL WIRE HAVING EXCELLENT DURABILITY AND SETTLING RESISTANCE, AND SPRING USING THE SAME

PROBLEM TO BE SOLVED: To provide a spring steel wire which has excellent durability and settling resistance without using expensive material, and a spring using the same.SOLUTION: The spring steel wire comprises, by mass, 0.63 to 0.68% C, 1.20 to 1.60% Si, 0.50 to 0.80% Mn, 0.50 to 0.80% Cr and 0.10...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO TAKESHI, MURAI TERUYUKI, TAKAMURA NOBUE
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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a spring steel wire which has excellent durability and settling resistance without using expensive material, and a spring using the same.SOLUTION: The spring steel wire comprises, by mass, 0.63 to 0.68% C, 1.20 to 1.60% Si, 0.50 to 0.80% Mn, 0.50 to 0.80% Cr and 0.10 to 0.20% V, and the balance Fe, in which the grain size number of old austenite grain sizes in the cross section is 12.5 to 13.5, and also, the density of carbides with a size of ≥0.1 μm diameter equivalent to a circle is ≤5 pieces/μmin the transmission electron microscope. The spring using the same has a residual shear strain of ≤0.055% after the application of 800 to 1,000 shear stress at 120°C for 48 hr, and is not broken even if prescribed amplitude stress is repeatedly applied for 3.0×10times.