摘要
实验室条件下模拟304不锈钢冶炼中的AOD工位,采用硅铁做终脱氧剂,选择CaO-SiO2-Al2O3-MgO-CaF2五元渣系,考察了精炼渣碱度对304不锈钢中夹杂物的影响.实验中发现,随精炼渣碱度的增大,钢中全氧质量分数降低,夹杂物的总数、总面积和平均半径减小,说明高碱度渣对304不锈钢中的脱氧产物吸附以及对细小夹杂物的生成有利;碱度大于2的精炼渣处理效果明显优于碱度为1.5的实验渣系,建议现场采用碱度大于2的渣系处理钢液.
The AOD process of the 304 stainless steel was simulated in lab,with the FeSi alloy taken as final deoxidant and the CaO-SiO2-Al2O3-MgO-CaF2 slag chosen as refining slag.Then,the effect of refining slag＇s basicity on the inclusions in the 304 stainless steel melts was investigated.The results showed that with the increasing basicity of refining slag the total mass fraction of oxygen decreases,as well as the total number,area and average size of inclusions.The fact means that the high basicity of slag benefits both the absorption of deoxidation products and the formation of fine inclusions.However,the effect of refining slag on the inclusions in molten steel revealed that a better result is available if the slag＇s basicity is 2 other than 1.5.So,it is recommended to taken the refining slag whose basicity should be greater than 2 in AOD process.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第10期1445-1448,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50704010)
关键词
304不锈钢
脱氧
精炼渣
碱度
夹杂物
304 stainless steel
deoxidation
refining slag
basicity
inclusions
