CSP工艺含铝无取向电工钢中夹杂物的演变和控制

 为了更好地控制CSP工艺下电工钢中的夹杂物，研究了涟钢CSP工艺含铝电工钢夹杂物在精炼连铸热轧过程中的演变机理。RH合金化后钢中夹杂物有Al2O3，Al2O3 SiO2和Al2O3 CaO CaS 主要3种，RH出站和中包钢液中的夹杂物主要是Al2O3 CaO CaS和少量单独的Al2O3和CaS夹杂。减少钢液中夹杂物的主要措施是降低RH出站前的顶渣氧化性。热轧卷材样中夹杂物与钢液中夹杂物不同，主要是AlN和MnS，夹杂物总量与氮、硫质量分数呈正相关，氮元素的影响最显著。

Evolution and control of inclusions in aluminum containing on #br# oriented electrical steel through CSP process

In order to control inclusions in electrical steel under CSP process better，the evolution mechanism of inclusions in the aluminum containing electrical steel during the RH refining continuous casting hot rolling in the CSP line of Lianyuan Steel Company were investigated. The inclusions in the liquid steel are mainly Al2O3, Al2O3 SiO2 and Al2O3 CaO CaS after the RH alloying. The inclusions in the liquid steel are composed of most of Al2O3 CaO CaS and a small amount of Al2O3 and CaS at RH outgoing and in tundish. The main measure to reduce inclusions in the molten steel is to reduce the oxidation of the top slag before the RH outlet. The main inclusions in hot rolled coil are AlN and MnS. The total amount of inclusions is positively correlated with the content of nitrogen and sulfur, and the effect of nitrogen is the most significant.