Hebei Messi Biology Co., Ltd. stated that high-performance magnesium oxide with specific reactivity, particle size and flow characteristics can be used to manufacture transformer silicon steel sheets with grain orientation. During annealing, the steel is treated with a magnesium oxide coating to form a glass-ceramic film (forsterite). The insulating properties of this film are very important, as is the choice of different magnesium oxide grades.
Study on the Influence of Magnesium Oxide on the Quality of Grain-oriented Silicon Steel Bottom
The surface quality of grain-oriented silicon steel mainly depends on the formation quality of the magnesium silicate bottom layer. In normal production, defects such as dew crystals, black bottom layer, redness, bluishness, and color difference often occur in the bottom layer of magnesium silicate. In order to improve the quality of the bottom layer, this article The effect of magnesium oxide activity, magnesium oxide coating process, and decarburization time on the formation of the bottom layer of magnesium silicate was studied.
The results showed that the higher the activity of magnesium oxide, the better the formation of the bottom layer; the moisture content of the magnesium oxide coating should be controlled at a certain level. Within the range, if the moisture content is too low, it will cause dew crystal defects; the extension of decarburization time is conducive to the formation of the bottom layer of magnesium silicate.
A method for controlling the temperature of an oriented silicon steel magnesium oxide coating solution belongs to the technical field of metallurgy. The control method is carried out in a…
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