1. Preliminary annealing: In the preliminary annealing process, the scale that may form on the hot-rolled steel is removed after delayed passage through the water breaker and hydrochloric acid bath. This initial heat treatment process improves the cold rolling properties and magnetic properties of the steel.

2. Cold rolling: In order to obtain specific thickness and material properties, a reduction ratio of 40-90% is usually used. Automatic control of edging machine and edging machine for uniform thickness and width.

3. Annealing: Annealing is the process of transforming cold-rolled tissue into recrystallized tissue through heat treatment. For grain-oriented electrical steel, there are two different annealing methods: decarburization annealing and high temperature annealing. Decarburizing annealing removes excess carbon from the steel and applies a magnesium oxide coating. High temperature annealing produces a secondary recrystallization structure with superior magnetic properties.

4. Insulation coating: In this process, the insulation coating is applied by the continuous coater roller to minimize eddy current losses proportional to the thickness of the sheet. A series of coating machines are used to apply the insulating coating solution to the top and bottom of the sheet. Grain-oriented electrical steel has two layers of coating, one layer is the bottom coating of dark brown Forsterite (Mg2SiO4) as the main component, and the other layer is the transparent insulating coating containing phosphate. For non-oriented electrical steel, various coating methods with different thicknesses and compositions are used according to the specific requirements of the end use and users. Silicon steel (electrical steel) process