双相不锈钢F55电渣重熔过程夹杂物的控制

Control of Inclusion in Electroslag Remelting Process of F55 Duplex Stainless Steel

摘要: 本文重点研究了双相不锈钢F55的电渣重熔工艺，研究发现，F55电极经过电渣重熔后钢中氧含量增加，经扫描电镜检测分析，钢中的夹杂物类型主要为高熔点的Al₂O₃。通过优化电渣工艺，采用CaF₂-CaO-Al₂O₃-MgO-SiO₂五元渣系，同时渣中加SiCa、Al对熔渣进行脱氧，Al₂O₃夹杂物发生变性，形成低熔点复合夹杂物，易于从钢中去除，从而实现F55电渣过程夹杂物的有效控制。

Abstract: The electroslag remelting of F55 duplex stainless steel is investigated.Resultsshow that the oxygen content increases after the electroslag remelting of the F55 electrode. The inclusions in the steel are mainly Al2O3 by SEM analysis. By optimizing the ESR process, using the slag of CaF2-CaO-Al2O3-MgO-SiO2 and adding SiCa and Al to deoxidize, the Al2O3 inclusions become deformed and the melting point becomes low, so the inclusion is easy to be removed from the steel, realizing the control the inclusions in the process of electroslag remelting of F55.