electrical silicon steel sheet prices silicon electrical steel 0.5mm sheets of transformer stabilizerThickness Tolerance

The good thickness tolerance is characterized by small difference in thickness in a direction parallel to the direction of rolling, small difference in thickness in a direction perpendicular to the direction of rolling, and high lamination factor.

Processing Properties

The product is suitable for punching and cutting with excellent dimensional tolerance.

Insulation Coating

The insulation coating has small color deviation, good adhesiveness and excellent resistance to heating and corrosion with high insulation coating resistance. There are several types of insulation coating available for production. According to the test results performed by the professional inspection organizations, the contents of hazardous substances comply with all the prevailing international and domestic environment protection laws and regulations including EU RoHS and REACH regulations.

origin
In 1900, Britain's Hadfield (R.A. Hadfield) first discovered that Si-Fe alloy containing Si4% has good magnetic properties. In 1903, Germany and the United States successively produced hot rolled silicon steel sheets containing 1.0% to 4.5% Si. In 1906, it replaced low carbon steel and was used to manufacture motor and transformer cores. In 1934, American Goss (N.P. Goss) used two cold rolling methods to produce (110) [001] grain-oriented cold-rolled silicon steel sheets containing Si3%. In 1968, Japan’s Taguchi and others used a comprehensive inhibitor of manganese sulfide and aluminum nitride and used a large reduction cold rolling method to produce (110) [001] highly magnetically oriented silicon steel. The grain orientation of this material is more accurate , Iron loss and magnetic properties are further improved. Over the years, the schematic curve of the decrease in the iron loss value of silicon steel is shown in Figure 1.

In 1949, the United States made cold-rolled (110) [001] oriented thin silicon steel strip with a thickness of less than 0.1 mm for the electronics industry. In 1957, Federal Republic of Germany made (100)[001] cubically oriented silicon steel sheet, which has a high magnetic aspect ratio, but because of the complex process, it has not been officially produced yet. Fig. 2 is a schematic diagram of grain arrangement in (110) [001] and (100) [001] oriented silicon steel sheets. The magnetostriction of Si-Fe alloy containing 6.5% of silicon is about zero, the magnetic permeability is high, the iron loss is low, the transformer made is noiseless, but it is not widely used because of the difficulty in processing. In the 1970s, liquid rapid cooling technology was used to make 6.5Si-Fe microcrystalline thin strips, and new varieties of thinner oriented silicon steel sheets and (100) plane texture (non-crystalline orientation) silicon steel sheets were developed.

China started producing hot-rolled low-silicon silicon steel sheets (Si1~2%) in 1953; started producing hot-rolled high-silicon silicon steel sheets (Si3.0~4.5%) in 1955; and began producing cold-rolled oriented thin silicon steel strips in 1962. In the 1970s, production of cold-rolled oriented silicon steel strip began.