High-sulfur steel and preparation method thereof

• Main Authors: PENG XIANJIN, LI FUHUA, XIANG HUAJUN, WANG HU, FEI XINGANG, PAN XIANMING, LI GANG, LIU YUEYUN
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2020
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses high-sulfur steel and a preparation method thereof.The preparation method comprises the steps that primary smelting is carried out, specifically, smelting raw materials are subjected to primary smelting treatment to obtain molten steel, then alloy is added into the molten steel according to designed components in a tapping process, and primary molten molten-steel is obtained; refining is carried out, specifically, refining slag is added into the primary molten molten-steel, refining treatment is carried out, a sulfur line is fed in the later stage of refining, and then,argon blowing and stirring is carried out until the mixture is uniform, so that refined molten steel is obtained; degassing is carried out, specifically, the refined molten steel is subjected to vacuum degassing treatment to obtain degassed molten steel; pouring is carried out, specifically, the degassed molten steel is subjected to pouring treatment to obtain a casting blank; and rolling is carried out, specifically, th