氧硫交互作用对硅钢中非金属夹杂物生成的影响

Effects of Interaction Between Oxygen and Sulfuer on Formation of Non-metallic Inclusions of Silicon Steel

结合工业化生产的无取向硅钢,探讨了氧硫交互作用对钢中夹杂物生成的影响。借助非水溶液电解+扫描电镜法,研究了不同O、S含量下钢中夹杂物的变化规律。结果表明,本实验条件下,提高O含量、降低S含量,会劣化热轧组织再结晶效果。在劣化效果上,O的作用大于S;低Si、无Al硅钢中,应尽可能降低O含量、适当提高S含量,以粗化钢中微细夹杂物,减少尺寸小于1.0μm的夹杂物的数量;O、S含量与钢中夹杂物数量不具有关联性。生产过程中,不仅要严格控制O、S含量,还要严格控制生产工艺,以免生成较多的有害夹杂物。

Based on the industrial production of non-oriented silicon steel, the effects of interaction between oxygen and sulfur on the formation of inclusions were discussed. The change of non-metal- lic inclusions in steel sheets was investigated by means of electrolysis with non-aqueous solution under different oxygen and sulfur content. Results show that the recrystallization microstructure of hot rolled sheets will be deteriorated with the increase of oxygen content and the decrease of sul- fur content. The deterioration effect of oxygen is more obvious than sulfur. For silicon steel with little Si and no A1, the oxygen and sulfur content should be strictly controlled in order to coarsen the micro inclusions and decrease the inclusions with size less than 1.0Bm. Furthermore, the oxy- gen and sulfur content are not proportional to the quantity of non-metallic inclusions. In order to decrease the formation of harmful inclusions, not only the oxygen and sulfur content, but also the technical parameters should be strictly controlled during the manufacturing process.