Oriented Electrical Steel Coil

Cold rolled Grain Oriented Electrical Steel

Grain Oriented Electrical Steel Production Process
Oriented electrical steel: ore --- ironmaking--- steelmaking--- hot-rolled---pickling-cold-rolled---annealed---cold-rolled silicon steel (oriented electrical steel)

Cold-rolled coils: ore--- ironmaking--- steelmaking--- hot-rolled---pickling-cold-rolled--- annealed--- cold-rolled coils

The key to the production of silicon steels with a Gaussian texture lies in the use of secondary recrystallization. In order to achieve secondary recrystallization, it is usually necessary to add normal grain growth inhibitors such as MnS to the alloy. The grain growth inhibitor must be diffusely distributed in the alloy matrix in the form of hybrids, which can effectively prevent the normal growth of the matrix crystal pull when the second recrystallization occurs, and at the same time, it is required to be easily eliminated in the final high-temperature annealing, so as not to deteriorate the magnetic properties of the product. In secondary recrystallization, the oriented nucleus of secondary grain growth is mainly produced by appropriate cold rolling process and recrystallization annealing. Since phase transitions can disrupt grain orientation, it is critical to maintain a single phase during heat treatment.
Cold-rolled electrical silicon steels sheet, divided into oriented silicon steels sheet, non-oriented silicon steels sheets and DW material. The common thickness of cold-rolled non-oriented silicon steel sheet for motor is 0.35 and 0.50mm, and their silicon content is generally low, while the common thickness of cold-rolled oriented silicon steels sheet for transformer is 0.20, 0.30, 0.35 and 0.50mm, and their silicon content is generally high.