HICON/H2 bell annealer technology distinguishes itself in quality and offers cost advantages in heat treating hot-rolled and drawn bunch wire coils.
It provides the most cost-effective process for soft annealing, recrystallizing and spheroidizing various steel wire grades, compared with the other heat treatment facilities currently available, since very different grades can be annealed in a single charge.
In every case, the materials must meet the high speeds and high degree of automation demanded by processing machines. This means that the highest uniformity of mechanical properties and surface finish conditions must be achieved over the entire length of wire, both to improve processing speeds and to increase the durability of the machinery.
The metallically-tight workload space allows the safe use hydrogen as a process gas. This allows drawn or descaled wire coils to be bright annealed, which in turn creates significant advantages in downstream processing steps. Pickling times can be significantly reduced or even eliminated completely. Depending on the material being processed, other process atmospheres such as nitrogen (used for scaled surfaces, to avoid decarburization), argon and mixed gases can also be used.
The facility can be implemented to comply with the standards required by the automotive industry, in accordance with CQI-9 (AIAG).
Cold-drawn or hot-rolled wire, such as:
It is also possible to heat treat wire with a non-circular cross-section (flat wire), as well as pieces/parts in charge baskets.
Diameters up to 4900 mm and stacking heights up to 6000 mm, with gross charge weights of up to 90 t when processing multiple stacks.