The killed steel plate is a hot-rolled steel plate made of ordinary carbon structural steel killed steel. The killed steel is a completely deoxidized steel. Before pouring, the molten steel is fully deoxidized with ferromanganese, ferrosilicon and aluminum. The molten steel has a low oxygen content (usually 0.002-0.003%), and the molten steel is relatively calm in the ingot mold without boiling. Therefore, the calm steel was named. Under normal operating conditions, there are no air bubbles in the killed steel, and the structure is uniform and dense; due to the low oxygen content, the oxides in the steel are less, the purity is high, the cold brittleness and aging tendency are small; at the same time, the killed steel has small segregation, good uniformity and quality higher.
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