Recent Development of Electrical Steel Sheets in China Steel Corporation

oleh Chien-Chou Lin, Shen-Chin Huang, Hua-Ming Huang, I-Ching Hsiao

Penerbit - China Steel Corp.

Kategori - Novel Am

The major applications of electrical steel sheets are motors, transformers, etc. In recent years, the raise of crude oil price and increasing environmental consciousness trigger the demands for saving energy and reducing CO2 emissions, which greatly accelerate the development of high quality electrical steel sheets. To fulfill the quality requirements of the high efficiency motors and transformers, the high grade electrical steel sheets with high flux density are continuously developed and introduced to the market. Meanwhile, the price competition and quality improvement of general grades are important in the lower end application as well, the iron loss of 50CS1300 (50A1300) is significantly decreased by controlling the key parameters. For the shape requirements, the edge drop of electrical steel sheets is steadily decreased, and the curvature of general grade is improved by conducting proper cooling rates in the final annealing process. Consequently, all grades of the electrical steel sheets can be used to produce bigger motors and transformers. As to the insulation coating development, the Cr-free insulation coating has been introduced to the market due to the environmental concern, and has been enormously adopted in Taiwan market. Besides, the thicker insulation coating technology has been developed for specific wind power generator application. The newly developed products and quality improvements of electrical steel sheets in China Steel are introduced in this paper.

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