双辊连铸无取向硅钢铸带特征及常化作用研究

双辊连铸技术是冶金及材料领域内的一项前沿技术,对于生产高品质硅钢具有独特优势.本实验研究了一种双辊铸轧wSi]=4.5%的无取向硅钢,考察其铸态和常化处理后样品的组织、织构及析出相尺寸特征.结果表明：铸带组织以与铸带法向成5~20（°）倾角的柱状晶为主,晶内存在少量0.3~0.4μm的AlN析出相,铸带织构以λ（〈001〉//ND）织构为主,表层织构漫散.950℃/10 min常化处理后,析出相尺寸增大,表层λ织构增强.

Study on state of initial and normalized non- oriented silicon steel by twin- roll strip casting

As an advanced technique of metallurgy and material science,twin- roll strip casting has unique advantages for producing high quality silicon steel. The present study was aimed at a 4. 5% Si non- oriented electrical steel for analyzing the structure,texture and the size of precipitates at the initial and normalized state. The results revealed that the initial structure mainly consisted of columnar grains with 5 ~ 20（ °） angle to the normal of cast strip,and some AlN precipitates of 0. 3 ~ 0. 4 μm in size within the strip. The initial texture was almost λ（ 001 / /ND）texture,in addition,texture near the surface layer was diffuse. After 950 ℃ /10 min normalizing treatment,the size of AlN precipitates coarsened and the texture of surface layer exhibited λ texture.