| 摘要 |
<p>PURPOSE:To improve the cleanliness of a high-speed tool steel having a specific compsn. by producing this steel via a ladle refining stage, a stage for obtaining a pole-shaped steel ingot and an electroslag melt refining stage. CONSTITUTION:A casting ingot is constituted, by weight, of 0.7 to 3.0% C, <=2.0% Si, <=2.0% Mn, 3.0 to 8.0% Cr, <=0.05% P, <=0.02% S, 5 to 20% 2Mo+W, 0.10 to 5.0% V, and the balance Fe at the time of obtaining the cast ingot by utilizing an ESR method from a molten steel. Thus, the high-speed tool steel having the excellent cleanliness and has excellent properties even in mechanical strength is produced. This tool steel is useful as a cutting tool steel, etc., of, for example, a pinion cutter, etc.</p> |
