The total global electrician output is approximately 7 million tons. At present, especially in recent years, with the rapid development of China's electricity and power industry, China's demand for oriented electrical steel has grown rapidly. In 2004, consumption accounted for nearly half of the global silicon steel sheet production, which has brought China's silicon steel sheet production into a period of rapid development, but it is still unable to meet domestic demand. In 2004, it imported 1.64 million tons of silicon steel sheets.
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, Not available in the electronics and military industries
Important shortcomings: Soft magnetic alloy electrical steel 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.
The key to producing silicon steel with 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.
What is the use of oriented electrical steel?
Grain-oriented electrical steel is an indispensable soft magnetic material in the electric power industry. It is mainly used in various types of rectifiers, transformers, reactors, large motors, etc., and is used to manufacture the iron cores of various transformers.
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