Steel for large-diameter grinding balls and preparation method of steel

The invention relates to steel for large-diameter grinding balls and a preparation method of the steel. The steel comprises, by mass, 0.71% to 0.79% of C, 0.25% to 0.35% of Si, 0.80% to 0.95% of Mn, 0.80% to 0.90% of Cr, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S, 0.0...

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Bibliographische Detailangaben
Hauptverfasser:	LIANG NA, GE WENYING, YUAN SHUJUN, ZHAI ZHENGLONG
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention relates to steel for large-diameter grinding balls and a preparation method of the steel. The steel comprises, by mass, 0.71% to 0.79% of C, 0.25% to 0.35% of Si, 0.80% to 0.95% of Mn, 0.80% to 0.90% of Cr, smaller than or equal to 0.025% of P, smaller than or equal to 0.025% of S, 0.05% to 0.10% of Ni, 0.03% to 0.08% of Mo, 0.020% to 0.050% of Al, smaller than or equal to 0.40% of Cu, smaller than or equal to 0.030% of Ti, and the balance Fe and inevitable impurities. The preparation method of the steel includes the steps of electric furnace smelting, LF refining, VD vacuum degassing treatment, continuous casting full-protection casting round billet production, and rolling for acquisition of the round steel. The manufactured large-specification grinding balls are good in impact strength and abrasion resistance.