Hot-Rolled Steel Sheet Scale Control for Magnetic Flux Uniformity

The patent applies preliminary action by performing high-pressure water descaling during the hot rolling process to remove Si scales before they can significantly affect surface uniformity. This proactive approach prevents scale-related defects from developing further, thereby improving surface uniformity while managing process complexity through timely intervention rather than requiring multiple complex treatment stages

The patent applies parameter changes by optimizing the slab heating temperature to a specific range (1150°C to 1300°C) rather than using excessively high temperatures. This controlled parameter adjustment ensures sufficient inhibitor formation for stable secondary recrystallization while minimizing energy consumption. The patent also controls the heating rate (10°C/min to 30°C/min) to achieve uniform temperature distribution, further improving energy efficiency

The patent converts the harmful effect of Si scales (which cause non-uniform radiant heat absorption and surface properties) into a beneficial process. By controlling the scaling conditions during hot rolling and then systematically removing the scales through high-pressure water descaling, the patent transforms the scale formation from a defect source into a controlled intermediate state that facilitates uniform surface treatment and improves overall surface property uniformity