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20GK080 grain-oriented silicon steel
Performance Features
• Low Core Loss Feature: In an alternating magnetic field, its core loss is extremely low, which can effectively reduce the energy loss of equipment such as transformers during operation, improve energy utilization efficiency and cut down the power cost.
• High Magnetic Induction Performance: It has a relatively high magnetic induction intensity and can generate a strong magnetic induction under a certain magnetic field. This enables the iron core of transformers and other equipment to obtain a higher magnetic flux density under a smaller magnetizing current, thus enhancing the working efficiency and power density of the equipment.
• Good Orientation: The crystal structure shows an obvious preferred orientation along the rolling direction, and the magnetic properties in this direction are greatly optimized with high magnetic permeability, which can better meet the requirements of power equipment for the direction and intensity of the magnetic field.
Chemical Composition
It usually contains about 3% silicon element, as well as appropriate amounts of elements such as carbon, aluminum, manganese, and sulfur. Silicon can increase the resistivity of steel, reduce core loss and enhance magnetic permeability. Aluminum combines with nitrogen to form inhibitors, which helps to control grain growth and improve magnetic properties. The contents of carbon, manganese, sulfur and other elements also need to be precisely controlled to ensure the comprehensive performance of the steel.
Production Process
It is smelted by an oxygen converter. The steel billet is hot-rolled, normalized, cold-rolled, intermediate-annealed, and then cold-rolled again to the finished thickness. After that, it undergoes decarburization annealing and high-temperature annealing, and finally is coated with an insulating layer.
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