无取向硅钢W800生产过程中夹杂物演变规律  

Evolution of inclusions in non-oriented silicon steel W800 during production process

作　　者：彭其春[1] 邱雷[1] 邹健[1] 彭明耀[2] 张亮洲[2] 周剑丰[2] 

机构地区：[1]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,湖北武汉430081 [2]华菱集团涟源钢铁公司,湖南娄底417009

出　　处：《钢铁》2015年第8期34-38,共5页Iron and Steel

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。The cleanliness of steel and the amount,size distribution and morphology of inclusions in non-oriented silicon steel W800,which was produced by 210 t BOF-RH-CC,were studied by oxygen and nitrogen analyzer,scan electron microscopy（ SEM）,image analytical,bulk sample electrolysis. The results show that w（ T[O ]） generally decreases,w（ [N]） increases gradually in steel; the size of most inclusions in the steel is 0-3 μm,the number of inclusions decreases ceaselessly during the smelting process. The inclusions during RH refining process are Al2O3 and a small amount of MgO-Al2O3. In tundish the number of MgO-Al2O3 increases,individual inclusion of Al2O3 decreases. The main inclusions in casting slab are Al N,Al2O3 and Mn S and the size is blow 10 μm,and individual Al2O3 is not be found,large inclusions mainly are Al2O3-SiO2,CaO-Al2O3-Si O2,CaO-MgO-Al2O3 formed with deoxidation products,slag and lining by the reaction.

关 键 词：无取向硅钢 夹杂物 洁净度 W800 

分 类 号：TG142[一般工业技术—材料科学与工程] TF76[金属学及工艺—金属材料]