无取向硅钢W800生产过程中夹杂物演变规律

发布时间：2018-06-20 23:18

本文选题：无取向硅钢 + 夹杂物　；参考：《钢铁》2015年08期

【摘要】：针对210 t BOF-RH-CC工艺生产的无取向硅钢W800,采用氧氮分析仪、扫描电镜、图像分析、大样电解的手段,研究W800生产工艺过程中钢水洁净度的变化及钢中夹杂物数量、尺寸、类型的演变规律。研究表明:钢中w(T[O])总体上逐渐降低,w([N])逐渐增加;钢中夹杂物尺寸大部分集中在0~3μm,在冶炼过程中夹杂物的数量不断减少;RH精炼过程中钢中夹杂物为Al2O3和少量MgO-Al2O3夹杂;中间包中MgO-Al2O3夹杂数量增加,单独Al2O3夹杂减少;铸坯中的夹杂物主要为Al N、Al2O3和MnS,尺寸在10μm以下,没有发现单独的Al2O3,铸坯中大型夹杂物主要为脱氧产物、卷入的炉渣与炉衬反应形成的Al2O3-SiO2、CaO-Al2O3-SiO2、CaO-MgO-Al2O3复合夹杂。
[Abstract]:The non-oriented silicon steel W800 produced by 210 t BOF-RH-CC process was studied by means of oxygen nitrogen analyzer, scanning electron microscope, image analysis and sample electrolysis to study the change of the cleanliness of molten steel and the quantity and size of inclusions in the steel during the production process of W800. The evolution of the type. The results show that the WT [O] in steel decreases gradually, and the inclusions in the steel increase gradually, and the inclusions in the steel are mainly concentrated at 0 ~ 3 渭 m, and the inclusions in the steel are Al _ 2O _ 3 and MgO-Al _ 2O _ 3 inclusions in the refining process of RH, and the inclusions are Al _ 2O _ 3 and MgO-Al _ 2O _ 3 inclusions in the refining process. The quantity of MgO-Al _ 2O _ 3 inclusions in the tundish increased, while the single Al _ 2O _ 3 inclusions decreased, while the inclusions in the billet were mainly Al _ N _ 2O _ 3 and mn _ S with the size below 10 渭 m. No single Al _ 2O _ 3 was found, and the large inclusions in the billet were mainly deoxidized products. The Al _ 2O _ 3-SiO _ 2o _ (2) CaO-Al _ 2O _ 3-SiO _ (2) O _ (2) O _ (2) -CaO-MgO-Al _ (3) O _ (3) composite inclusion was formed by the reaction of the involved slag with
【作者单位】：武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室;华菱集团涟源钢铁公司;
【分类号】：TG142;TF76

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