Chamber furnace HICON/H2

annealingoxidationpowder coating

After cold rolling, the highly worked non-grain-oriented electrical steel strip (NGO) is recrystallized in a continuous furnace and the grain size is adjusted by secondary recrystallization. A thin layer of insulating lacquer is then applied in-line with a roller coater, in order to reduce eddy current losses in the electrical motor and prevent corrosion. The process steps for this phase of production are as follows: Multi-stage strip cleaning Rapid strip heating in the heating-up section of the continuous furnace (optionally with a rapid heating system) Annealing for recrystallization and discontinuous grain growth in an extremely pure hydrogen atmosphere Controlled cooling in the slow cooling zone and final cooling zone Coating using a roller coater and drying equipment The special design features of this system deliver the following advantages: Lowest dewpoints due to excellent furnace sealing concept and up to 100 % hydrogen process atmosphere to avoid surface oxidation,