不锈钢(304HC)浇铸过程保护渣成分变化及其对渣性能影响  

Change in Composition of Mold Flux and Its Effects on Properties During Casting 304HC Stainless Steel

作　　者：王新月[1] 金山同[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2006年第11期20-22,共3页Iron and Steel

摘　　要：通过不锈钢(304HC)连铸过程中对结晶器内液渣现场取样、分析,探索了结晶器内渣-钢界面化学反应及钢中杂夹的吸收造成渣成分的变化,及其对熔渣性能的影响。研究表明,渣中Al2O3、Cr2O3含量有所增长,F减少,碱度下降,并造成保护渣使用性能发生变化,粘度有波动、凝固温度升高及结晶率下降。研究结果为更合理地设计不锈钢连铸保护渣配方,进一步降低不锈钢铸坯表面缺陷提供了依据。The change in mold flux composition, caused by the products （products of deoxidation and products of reoxidation as the results of chemical reactions on inner slag-metal interface, and inclusions from refractories） which were finally absorbed by mold flux, and its effects on flux properties were investigated by sampling mold flux during continuous casting of 304HC and analysis. By comparing these samples with the original flux, it was found that A1203 and Cr20~ contents of mold flux were increased, F content was decreased and basieity of mold flux was reduced during casting, And all of these caused the change in properties of molten flux, such as viscosity; solidification temperature and the crystalline fraction of slag film. The results are good for the rational design of mold flux during casting of stainless steel and reducing the surface defects of stainless steel cast piece.

关 键 词：连铸 不锈钢 保护渣 

分 类 号：TF777[冶金工程—钢铁冶金]