Grain oriented electrical steel is also known as cold rolled oriented silicon steel. Cold-rolled directional silicon steel contains 2.9%~3.5% Si. The crystal structure of the steel plate refers to cold-rolled electrical steel with certain rules and directions.
Grain-oriented electrical steel has a history of hundreds of years. Grain-oriented electrical steel includes two types: electrical steel with Si <0.5% and silicon steel with Si content of 0.5~6.5%. It is mainly used as the core of various motors, transformers and ballasts. It is an important component of electric power, An important soft magnetic alloy electrical steel that is indispensable in the electronics and military industries is an important metal functional material that is used in large quantities and has high energy efficiency among magnetic materials. The manufacturing process and equipment of electrical steel, especially directional silicon steel, are complex, the composition is strictly controlled, the manufacturing process is long, and there are many factors that affect performance. Therefore, the quality of directional silicon steel products is regarded as an important indicator of a country's special steel manufacturing technology level. It often gets the nickname "artistic product" among special steels.
What is the production process of oriented electrical steel? Let's analyze it together.
Oriented electrical steel: ore-iron-making-steel-making-hot rolling-pickling-cold rolling-annealing-cold-rolled silicon steel (oriented electrical steel) cold-rolled coil ore-iron making-steel making-hot rolling-pickling-cold rolling - Annealed - cold rolled coil.
The key to producing silicon steel with a Gaussian structure is to utilize the second recrystallization. In order to carry out the second recrystallization, it is usually necessary to add normal grain growth inhibitors to the alloy, such as MnS, etc. The grain growth inhibitor must be dispersed in the body of the aerator in a miscellaneous form. When the second recrystallization occurs, it can effectively prevent the normal growth of gas crystals, and it must be easily removed from the final high-temperature degradation to avoid aggravating the product. of magnetism. In the second recrystallization, the orientation nuclei of the second grain growth are mainly caused by the proper cold rolling process and recrystallization degradation. Phase changes can impair grain orientation, so it is important to maintain a single phase during heat treatment.
Cold-rolled electrical silicon steel sheets, oriented silicon steel sheets, non-oriented silicon steel sheets and dw materials. Cold-rolled non-oriented silicon steel sheets for motors generally have thicknesses of 0.35 and 0.50mm and low silicon content. The general thickness of cold-rolled silicon steel sheets for transformers is 0.20, 0.30, 0.35, and 0.50 mm, and the silicon content is generally high.
