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发明公开
CN104762562A 一种大直径磨球用钢及其制造方法 有权

一种大直径磨球用钢及其制造方法
摘要：
本发明涉及一种大直径磨球用钢及其制造方法，其组成按质量百分数为：C：0.71％-0.79％、Si：0.25％-0.35％、Mn：0.80％-0.95％、Cr：0.80％-0.90％、P：≤0.025％、S：≤0.025％、Ni：0.05％-0.10％、Mo：0.03％-0.08％、Al：0.020％-0.050％、Cu：≤0.40％、Ti≤0.030％，其余为Fe和不可避免的杂质。其制备方法采用电炉冶炼、LF精炼+VD真空脱气处理、连铸全保护浇注生产圆坯；轧制制得圆钢。采用本发明制得的大规格磨球圆钢具有良好的冲击性和耐磨性。
摘要（英）：

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.

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