关键词: 热轧板, 含铜高磁感取向硅钢, 组织, 抑制剂, 冷却工艺

Abstract: The simulated CSP process tested Cu-bearing high magnetic induction oriented (Hi-B) steel (/% : 0. 06C, 3. 38Si, 0. 14Mn, 0. 013P, 0. 003S, 0. 37Cu, 0. 019Als, 0.0087N) is melted by laboratory 15 kg vacuum induction furnace, cast to 60mm x 120mm slab and hot-rolled by 5 passes to 3. 95 mm plate with finishing rolling temperature 870 °C. The effect of direct water-quenching (after rolling water-quenching at 870℃ ) and stepped cooling ( after rolling water-quenching at 870℃ to 580℃ then air-cooling) process on precipitation of inhibitors at surface layer and center of hot-rolled plate has been studied. Results show that the main inhibitors precipitated in hot-rolled plate are Cu₂S spherical particles with some MnS etc ； the amount of inhibitors precipitated at surface layer of hot-rolled plate is less than that precipitated at center of plate, but the average size of inhibitors is larger than that at center； and the size of precipitated inhibitors in steel plate by stepped cooling process is larger than the size of precipitated inhibitors in steel plate by direct water quenching process.