Controlling oxygen content in electro-slag remelting steel by optimizing slag-steel reaction process
作者机构：Iron&Steel Research Institutes of Ansteel Group CorporationAnshan 114009LiaoningChina State Key Laboratory of Metal Material for Marine Equipment and ApplicationAnshan 114009LiaoningChina Shenyang Research Institute of Foundry Co.Ltd.CAMNational Key Laboratory of Advanced Casting TechnologiesShenyang 110022China
出 版 物：《China Foundry》 (中国铸造（英文版）)
年 卷 期：2023年第20卷第6期
页 面：503-510页
核心收录：
学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：ion-molecular coexistence theory slag-steel reaction deoxidation electro-slag remelting
摘 要：The thermodynamic equilibrium of deoxidation reactions between molten slag and steel was calculated using a slag-steel coupling thermodynamic model and the mass conservation model based on the ion-molecular coexistence theory.The study focused on the effects of slag composition and deoxidizer type on the oxygen content of low alloy steel during the electroslag remelting(ESR)process.The measured and predicted values of the oxygen content in remelted ingots,and the contents of FeO and MnO in slags were compared and analyzed.Results show that the measured content of total oxygen has a certain correlation with the trend of dissolved oxygen predicted by the model when using Ca-Si alloys as deoxidizer,but it is not correlated with the trend of dissolved oxygen predicted by the model when using Al as deoxidizer.The deoxidation mechanisms of Ca-Si and Al are different.Ca-Si alloy directly reacts with FeO and MnO in slag to reduce the oxygen potential of slag,hence it can inhibit the transfer of oxygen from the slag to molten steel.While,when Al deoxidizer is used,the oxygen content in steel is mainly reduced through floating up the alumina inclusions.Compared to Al,utilizing Ca-Si alloy as a deoxidizer is more effective in reducing the oxygen content and the amount of inclusions in ESR ingot.
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