ROLLED STEEL BAR OR ROLLED WIRE MATERIAL FOR COLD-FORGED COMPONENT

In a rolled steel bar or rolled wire rod for a cold-forged component having a predetermined chemical composition, Y1 represented by Y1=[Mn] ×[Cr] and Y2 represented by Y2=0.134×(D/25.4-(0.50×[C]))/(0.50×[C]) satisfy Y1>Y2, the tensile strength is 750 MPa or less, an internal structure is a fe...

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Bibliographische Detailangaben
Hauptverfasser:	OBATA Akihisa, CHIBA Keisuke, MATSUI Naoki, HORI Shoji, CHIDA Tetsushi, NEISHI Yutaka
Format:	Patent
Sprache:	eng ; fre ; ger
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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	In a rolled steel bar or rolled wire rod for a cold-forged component having a predetermined chemical composition, Y1 represented by Y1=[Mn] ×[Cr] and Y2 represented by Y2=0.134×(D/25.4-(0.50×[C]))/(0.50×[C]) satisfy Y1>Y2, the tensile strength is 750 MPa or less, an internal structure is a ferrite-pearlite structure, and the ferrite fraction in the internal structure is 40% or greater. AMOUNT IS 0.30%