Production process of cold rolled non oriented electrical steel

Cold rolled non oriented electrical steel is an important electrical material widely used in power generation equipment, power transformers and electric motors. Its optimized production process is the key to achieve efficient energy conversion and excellent electrical performance. What about the production process of cold-rolled non-oriented electrical steel?

1. Raw material preparation:

The production process of cold-rolled non-oriented electrical steel begins with raw material preparation. High-quality silicon steel sheets are the basis for the production of cold-rolled non-oriented electrical steel. The preparation of silicon steel sheets usually includes processes such as material selection, smelting, continuous casting and rolling. In the material selection process, low-impurity, high-purity ferrosilicon and cold-rolled steel sheets should be selected as raw materials to ensure the electromagnetic and mechanical properties of the final product.

2. Pre-furnace treatment:

In the production process, pre-furnace treatment is one of the crucial steps. It mainly includes processes such as pickling, deoxidation and heat treatment. Pickling can remove scale and impurities on the surface of silicon steel sheet to improve its surface quality. The oxygen removal process aims to remove the oxygen in the silicon steel sheet to reduce the formation of oxides and further improve the magnetic properties of the material. Heat treatment is to control the grain structure of silicon steel sheet by heating and cooling, so as to optimize its magnetic permeability and magnetic saturation induction.

3. Cold rolling manufacturing:

Cold-rolled manufacturing is the core link in the production process of cold-rolled non-oriented electrical steel. It presses the silicon steel sheet into the required thin plate by rolling process. The rolling force and rolling temperature in the cold rolling process need to be precisely controlled to ensure the dimensional accuracy and surface quality of the product. At the same time, through the cold deformation during the rolling process, the magnetic properties of the silicon steel sheet can be improved, and its magnetic permeability and magnetic induction intensity can be increased.

4. Annealing treatment:

Annealing treatment is one of the important links in the production of cold-rolled non-oriented electrical steel. By heating and cooling, the grain structure and magnetic properties of silicon steel sheets can be adjusted. The temperature, time and cooling rate during the annealing process need to be strictly controlled to ensure that the product achieves the magnetic and mechanical properties required by the design.

5. Surface treatment:

Finally, cold rolled non oriented electrical steel is surface-treated to improve its corrosion resistance and coating adhesion. Common surface treatment methods include pickling, galvanizing, and electroplating. These treatments can prevent oxidation and corrosion on the surface of silicon steel sheets, while providing good adhesion for subsequent insulating coatings.

The production process of cold rolled non oriented electrical steel is the key to achieve optimized energy conversion and high-efficiency electrical performance. Cold-rolled non-oriented electrical steel products with excellent electromagnetic properties and mechanical properties can be produced through precise control of raw material preparation, furnace pre-treatment, cold-rolled manufacturing, annealing treatment, and surface treatment. For more information about electrical steel, contact us now.