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MEDIUM CARBON SULFUR FREE CUTTING STEEL HAVING EXCELLENT MACHINABILITY AND METHOD FOR REFINING THE MELTING IRON OF THE SAME
MEDIUM CARBON SULFUR FREE CUTTING STEEL HAVING EXCELLENT MACHINABILITY AND METHOD FOR REFINING THE MELTING IRON OF THE SAME
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机译:具有出色可加工性的中碳无硫切削钢及其精炼铁的方法
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摘要
PURPOSE: A medium carbon sulfur free cutting steel with excellent machinability and a method for refining the melting iron of the same are provided to minimize surface fault such as scab generated by inclusion in a hot rolling process. CONSTITUTION: A method for refining the melting iron of medium carbon sulfur free cutting steel comprises following steps. Sulfur alloy steel is added on a vacant teeming ladle before tapping molten iron at a converter. The molten iron is tapped on the teeming ladle in which sulfur alloy steel is contained. The molten iron is deoxidized by adding molten iron deoxidizer at the end of a tapping process. The molten steel and the slag are controlled.
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