RH vacuum refining method for ultra-low carbon steel

• Main Authors: YAO SHUANG, TIAN ZHIGUO, PENG NINGQI, CHENG HAOXUAN, DING XINGYAN, YUAN QIAOJUN
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2022
• 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

An RH vacuum refining method of ultra-low carbon steel comprises the process route of blast furnace-converter-LF refining furnace-RH vacuum furnace-CC continuous casting-steel rolling, and is characterized in that the steel comprises the following chemical components in percentage by weight: less than or equal to 0.005% of C, less than or equal to 0.01% of Si, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Cr, less than or equal to 0.008% of P, less than or equal to 0.01% of S and the balance of Fe and inevitable impurities. The method comprises the key process steps of preparation of refined molten steel, control of argon flow, control of vacuum degree and control of oxygen supply intensity, the problem that the carbon content required by chemical components in ultra-low carbon steel smelting production is 50 * 10 <-4 >% or below is solved, the requirement of customers for steel conductivity is met, and low-cost and large-batch production of ultra-low carbon steel is achieved. 一种超低碳钢的RH真空精