| 摘要 |
PURPOSE: To provide a stainless steel manufacturing method for reducing AOD operation time and improving quality of final products by improving a hitting ratio of an end point silicon content using a prediction model of silicon for reduction capable of accurately predicting an addition amount of reduction silicon added as a deoxidizer of an AOD reduction step in a stainless steel manufacturing process. CONSTITUTION: In a stainless steel manufacturing method in which molten steel charged into a refining furnace for AOD(argon oxygen decarburization) contains 1.00 to 2.50 wt.% of carbon and 0.01 to 0.50 wt.% of silicon, and a final product contains 0.02 to 0.13 wt.% of carbon, 0.3 to 0.8 wt.% of silicon, 16.5 to 19 wt.% of chromium and the balance being iron and other inevitable impurities, the manufacturing method of stainless steel is characterized in that an addition amount of silicon for reduction in a reduction step after completing decarburization in the stainless steel refining process is determined by using operation factors required during refining including a carbon content£C|% during raw material charging, a silicon content£Si|% during raw material charging, a first step carbon content£C|% analyzed after a first decarburization step that is a refining process, a metal oxide oxygen amount calculated during reduction and desulfurization after finishing decarburization, a rinsing flow rate of argon gas, a total charging amount of molten steel charged into the refining furnace and an amount of quicklime consumed.
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