The effects of the superheat of the steel in tundish, electromagnetic stirring current, secondary cooling intensity, casting speed and sectional dimension on the central equiaxed crystal ratio were investigated through the macro examination of oriented silicon steel slab. The results showed that under the test conditions, when the superheat of the steel in tundish was controlled within the range of 14-18 ℃, the change of the central equiaxed crystal ratio caused by the difference of the superheat was small, and the variation range was only 0%-3%. The influence of the electromagnetic stirring current and the sectional dimension of the slab on the central equiaxed crystal ratio was obvious. With the increase of the stirring current, the central equiaxed crystal ratio increased, and it decreased when the sectional dimension of the slab increased. The influence of the secondary cooling intensity and casting speed on the central equiaxed crystal ratio was relatively small. With the increase of the secondary cooling intensity, the central equiaxed crystal ratio decreased, and it increased when the casting speed increased.
Zeng Y M,Luo J L,Norton P R.A study of semiconducting properties of hydrogen containing passive films [J].Thin Solid Films,2004,460(1/2):116.
[6]
Daviesd H,Burstein G T.The effects of bicarbonate on the corrosion and passivation of iron[J].Corrosion,1980,36(8):416.
[7]
WANG Y,XU Y B,ZHANG Y X,et al.Development of microstructure and texture in strip casting grain oriented silicon steel[J].Journal of Magnetism and Magnetic Materials,2015,379:161.
[8]
DONG T L,XIANG L,YUE E B,et al.Microstructure development of grain oriented silicon steel produced by thin slab casting and rolling process[J].Journal of Iron and Steel Research,International,2010,22(7):56.
2020, Vol. 30 
