Abstract: Faced with the pressures of quality improvement, efficiency enhancement and green manufacturing in the iron and steel industry, innovation in rolling process is the key to boosting the competitiveness of non⁃oriented electrical steel. Taking a 20⁃high rolling mill as the research platform, this paper conducted an integrated study on reduced⁃pass rolling of high⁃grade non⁃oriented electrical steel. Combining material testing, finite element simulation and rolling experiments, it reveals the influence law of silicon content on the key rolling characteristics, establishes a "material⁃process⁃equipment" collaborative optimization technology system, proposes a reduction strategy of "large reduction in the early passes, small reduction in the later passes, and stable reduction in the middle passes", develops a dynamic flow and temperature control technology for emulsion, and optimizes the coordinated model of flatness and tension. The results showed that on the premise of ensuring magnetic properties, flatness accuracy and surface quality, the number of rolling passes reduced from 6 to 5 can achieve production increase and cost reduction.

Key words: 20?high rolling mill, high?grade non?oriented silicon steel, reduction of passes, plate shape control