Abstract: Grain-oriented silicon steel is a kind of iron-silicon binary alloy widely used in electrical equipment manufacturing industry. It needs special properties such as low iron loss, high magnetic induction intensity, low magnetic aging, good punching performance and high surface quality. Its production processes and equipments are complex, and its chemical composition is strictly controlled. According to the production processes and performances, it is mainly divided into ordinary grain-oriented silicon steel (CGO) and high magnetic induction grain-oriented silicon steel (HiB). Starting from the product requirements of grain-oriented silicon steel, the latest production progresses of domestic and foreign enterprises such as Japan's Kawasaki Steel and Nippon Steel, China's Baowu Steel and Shougang Corporation were introduced, and the technological processes and quality control points of this type of steel  were discussed, and the key production technology of grain-oriented silicon steel were  emphatically introduced. Finally, six new processes for producing grain-oriented silicon steel, including thin slab continuous casting and rolling, asynchronous rolling, magnetic domain refinement, production without traditional inhibitor, double grain-oriented silicon steel and magnetic field annealing, were discussed. The new technologies of silicon steel looked forward to the development trend of grain-oriented silicon steel.

Key words: oriented silicon steel, development overview, production status, quality control, key technology