The ultra-thin plate online induction heating production line is mainly used in short-process continuous casting and rolling (such as ESP, MCCR and other processes). Its core function is to use electromagnetic induction technology to quickly and accurately reheat or equalize the temperature of high-temperature plates and strips.
Compensating for rolling temperature drops to ensure continuous rolling: Ultra-thin strips dissipate heat rapidly during high-speed rolling; if the temperature falls below the recrystallization temperature, cracking can occur. Online induction heating can instantaneously raise the strip temperature by 25°C–300°C, stabilizing the entry temperature for the finishing mill. This allows ultra-thin steel plates (0.8 mm–2.0 mm) to pass through the rolling mill in a single run, eliminating the need for offline reheating.
Eliminating edge cracks and increasing product yield: Strip edges cool faster than the center, making them prone to edge crumbling and cracking. This technology enables selective edge heating to precisely compensate for temperature differentials (raising edge temperatures by 30°C–70°C). This significantly reduces the amount of edge trimming required and boosts product yield by 5%–10%.
Optimizing microstructure and properties to enable "hot-rolling instead of cold-rolling": By precisely controlling the heating temperature field (maintaining uniformity within ±20°C) and refining grain size, hot-rolled ultra-thin plates achieve surface quality and mechanical properties comparable to cold-rolled products. This allows for the partial replacement of cold-rolling processes, reducing overall energy consumption by 40%–65%.
Energy efficiency and green production: Compared to traditional gas-fired furnaces, induction heating offers high thermal efficiency (60%–80%) and produces no combustion exhaust. It reduces the oxidation loss rate from 1.5% to below 0.5%. Additionally, its "instant start-stop" capability significantly lowers electricity consumption and carbon emissions per ton of steel.