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研究了铝、氮和锰、硫摩尔比对取向硅钢中夹杂物的析出行为及热轧组织的影响。结果表明,钢中的夹杂物是少量尺寸小于5μm的、以Al2O3为核心外包Mn S与Al N的复合物;钢中析出物主要为尺寸小于0.5μm的Mn S与Al N的复合抑制剂。其中氮铝摩尔比为0.9、锰硫摩尔比为15.7的取向硅钢中析出物数量最多,铸坯中数量为5 937个/mm3,热轧板坯中数量为7 024个/mm3;平均尺寸最小,铸坯中尺寸为0.17μm,热轧板坯中尺寸0.15μm,热轧后钢中析出物数量增加,并且热轧板坯边缘和中心组织都最均匀。
The effects of aluminum, nitrogen, manganese and sulfur molar ratio on the precipitation behavior and hot rolling microstructure of oriented silicon steel were studied. The results show that the inclusions in steel are a small amount of size less than 5μm, and the matrix of Mn S and Al N is outsourced with Al2O3 as the core. The precipitates in steel are the composite inhibitors of Mn S and Al N with sizes less than 0.5μm. The silicon steel with the ratio of nitrogen and aluminum of 0.9 and manganese-sulfur molar ratio of 15.7 has the highest number of precipitates, the number of slab is 5 937 / mm3, the number of hot-rolled slab is 7 024 / mm3; the average size is the smallest , The size of the slab is 0.17μm, the size of the hot-rolled slab is 0.15μm, the amount of precipitates in the hot-rolled steel increases, and the edges and the center of the hot-rolled slab are the most uniform.