Cold-rolled oriented silicon steel can also be divided into two categories: common oriented silicon steel (CGO) and high magnetic induction oriented silicon steel (Hi-B). High magnetic induction cold-rolled oriented silicon steel is single-oriented steel strip. It is mainly used to manufacture various electromagnetic components such as chokes and transformers in electronic instruments.

Cold-rolled silicon steel sheets, grain-non-oriented and grain-oriented steel strips

Grain-non-oriented cold-rolled strip is usually used as the core of motors or welding transformers; grain-oriented cold-rolled strip is used as the core of power transformers, pulse transformers, magnetic amplifiers, etc. Cold-rolled oriented thin silicon steel strip is made from 0.30 or 0.35mm thick oriented silicon steel strip, which is then pickled, cold rolled and annealed.

The cold-rolled non-oriented silicon steel sheet is made by hot-rolling the billet or continuous casting billet into a coil with a thickness of about 2.3mm. Cold-rolled electrical steel strip has the characteristics of smooth surface, uniform thickness, high stacking coefficient, and good punching performance. It has higher magnetic induction and lower iron loss than hot-rolled electrical steel strip.

Using cold strip instead of hot-rolled strip to manufacture motors or transformers can reduce the weight and volume by 0%-25%. If cold-rolled oriented strip is used, the performance will be better. Using it instead of hot-rolled strip or low-grade cold-rolled strip can reduce the power consumption of the transformer by 45%-50%, and the transformer performance will be more reliable.

The difference between non-oriented silicon steel and oriented silicon steel

1.Different properties
Grain-oriented silicon steel: Grain-oriented silicon steel, also known as cold-rolled transformer steel, is an important ferrosilicon alloy used in the transformer (core) manufacturing industry.
Non-oriented silicon steel: Non-oriented silicon steel is a ferrosilicon alloy with very low carbon content. Its grains are randomly oriented in the deformed and annealed steel plate.

2.Different characteristics
Grain-oriented silicon steel: The magnetism of grain-oriented silicon steel has strong directionality, with the lowest iron loss value in the rolling direction, the highest magnetic permeability and high magnetic induction value under a certain magnetizing field. The silicon content of oriented silicon steel is about 3%, and the steel is required to have low oxide inclusion content and must contain some kind of inhibitor (MnS, A1N).
Non-oriented silicon steel: Non-oriented silicon steel is a ferrosilicon alloy containing 0.8%-4.8% silicon. It is hot and cold rolled into silicon steel sheets with a thickness of less than 1mm. Adding silicon can increase the resistivity and maximum magnetic permeability of iron, and reduce coercive force, core loss (iron loss) and magnetic aging.

3. Different production processes
Grain-oriented silicon steel: Grain-oriented silicon steel is smelted in an oxygen converter. The billet undergoes hot rolling, normalization, cold rolling, intermediate annealing and secondary cold rolling to the finished thickness, and then undergoes decarburization annealing and high-temperature annealing, and is finally coated with an insulating layer.
Non-oriented silicon steel: pre-desulfurization of molten iron, secondary desulfurization by adding Ca0+CaF: flux or rare earth elements and calcium during converter blowing. The boiling molten steel is decarburized by vacuum treatment and then further desulfurized. Ferrosilicon with low titanium and zirconium content is selected for alloying.

Company Profile

GNEE STEEL company is located in Anyang, Henan Province. Mainly engaged in the sales of cold-rolled oriented silicon steel and the production of silicon steel cores. We manufacture steel cores as per our customers’ needs. In recent years, the company has established close cooperative relationships with domestic new energy vehicle manufacturers, and has a rich product range that can meet the various needs of customers. With the development of new energy vehicles, our company is sincerely willing to cooperate with enterprises around the world to achieve a win-win situation. The wave of economic globalization is unstoppable.