Non-oriented electrical steel is a silicon soft magnetic alloy with extremely low carbon content. It is an indispensable and important material in the power, electronics, and military industries. According to statistics, the total global output of electronic and electrical products was 6.714 million tons in 2000, and exceeded 8 million tons in 2005. At present, the consumption growth of my country's domestic enterprise market has far exceeded 3 million tons. There is no need for silicon steel in rotating work. In recent years, with the development of high-speed and miniaturization of motors in our country, a higher requirement has been put forward for the performance design requirements of non-oriented electrical steel (for example, at high frequency, low iron loss and high Magnetic intensity, etc.).
Electrical steel is an important material for manufacturing the cores of motors, transformers and ballasts. Especially cold-rolled non-oriented electrical steel, which is a high-quality product among the production technology enterprises of China Steel Corporation, has a very high value. The production of cold-rolled non-oriented electrical steel involves the organic combination of enterprise processes, technology and knowledge.
What is the role of non-oriented electrical steel? Let's analyze it below.
The manufacturing process and equipment of electricians are complex and the ingredients are strictly controlled. Therefore, for the development of enterprises, the manufacturing technology of electricians can be regarded as life and environmental protection is carried out in the form of patents. The manufacturing technology and product quality of electricians have become one of the important indicators to measure the development level of a country's steel technology.
Generally speaking, electric motor power accounts for about 65% to 170% of the total power generation. If the loss of electric motors can be reduced by 10%, according to statistical calculations in 2006, the country's electric motors can save more than 20 billion KW H/A, which is equivalent to annual savings 7.7 million tons of standard coal, reducing more than 120,000 tons of sulfur dioxide. Therefore, improving the performance of non-directional electricians is of great research significance for energy conservation and emission reduction.
What is the manufacturing process of non-oriented electrical steel? Let's analyze it below.
The main technical key to improving the performance of non-oriented electrical steel is to further achieve strict control of the steel composition. Because trace elements have a great impact on the magnetic properties of non-oriented silicon steel.
The main harmful elements that have poor magnetic properties are:
(1) Carbon 3360 worsens iron damage, causes aging, and forms tiny carbides.
(2) Nitrogen sulfate: It will produce sulfides such as MnS, nitrides such as AlN and TiN, and various oxides and other particles to prevent walls from moving.
(3) Ti 3360 produces tic and tin fine particles, which increases the recrystallization temperature, delays the recrystallization temperature and grain growth, and promotes unfavorable development directions.
(4) Plutonium 3360 generates VC, VN, ZrC, ZrN, NbC, and NbN fine structural particles that can precipitate and hinder recrystallization and grain structure growth.
(5) Arsenic 3360 can promote the precipitation of sulfides such as MnS.
(6) Copper 3360 produces CuS particles, which hinders the movement of magnetic domain walls and grain growth.
(7) Plutonium 3360 produces related oxide, sulfide, and nitride particles, which affects performance.
Grain Non oriented silicon steel
