When the oriented silicon steel sheet is used, the Fe-Si alloy is melted in a flat furnace or an electric furnace, repeatedly rolled into a thin plate, and annealed at 800 to 850 ° C. Hot-rolled silicon steel sheet is mainly used for the manufacture of generators, so it is also called hot-rolled motor silicon steel sheet, cold-rolled non-oriented silicon steel sheet: cold-rolled non-oriented silicon steel sheet is mainly used for generator manufacturing, so it is also called cold-rolled motor. Silicon steel. The silicon content is 0.5%-3.0%, and after cold rolling to the thickness of the finished product, the steel strips are mostly 0.35 mm and 0.5 mm thick. The Bs of cold-rolled non-oriented silicon steel is higher than that of oriented silicon steel; compared with hot-rolled silicon steel, its thickness is uniform, the dimensional accuracy is high, and the surface is smooth and flat, thereby improving the filling factor and the magnetic properties of the material.
The main use of oriented silicon steel sheets is for transformer manufacturing, so it is also called cold rolled transformer silicon steel. Compared with cold-rolled non-oriented silicon steel, oriented silicon steel has strong directionality; it has superior high magnetic permeability and low loss characteristics in the easy magnetization rolling direction. The iron loss of the oriented steel strip in the rolling direction is only 1/3 of the transverse direction, the ratio of magnetic permeability is 6:1, the iron loss is about 1/2 of the hot rolled strip, and the magnetic permeability is 2.5 times that of the latter. .
A ferrosilicon alloy containing 0.5% to 4.8% of silicon. It is a soft magnetic material widely used in the electrical field. Silicon steel for electricians is often rolled into large sheets or strips of standard size, commonly known as silicon steel sheets, which are widely used in electric motors, generators, transformers, electromagnetic mechanisms, relay electronic devices and measuring instruments.
A well-oriented silicon steel plate has a good deoxidizer, which combines with oxygen to convert oxygen into stable SiO2 which is not carbon-reduced, and avoids lattice distortion of iron due to oxygen atom doping. Silicon becomes a solid solution in alpha iron, which increases the electrical resistivity and helps to separate harmful impurities. Therefore, generally, iron containing impurities can increase magnetic permeability, reduce coercive force and iron loss when added to silicon. However, the increase in silicon content causes the material to become hard and brittle, and the thermal conductivity and toughness decrease, which is unfavorable for heat dissipation and mechanical processing. Therefore, the silicon content of the silicon steel sheet generally does not exceed 4.5%.