+A -soft annealing
+AC -spheroidizing annealing
+FC –annealing for ferrite-pearlite microstructure
Off-line heat treatment area includes the following:
1. Line consists of 3 chamber furnaces for spheroidizing annealing in neutral protective atmosphere of nitrogen. It is possible to treat bars with diameter from 20 up to 160 mm and length up to 12 m. Bars are laid on multitier support in single + double lay (for small sections) with total weight up to 25÷30 t.
2. Line consists of 1 continuous line of isotermal annealing bars with diametеr 20-80 mm in controlled atmosphere with indirect heating by emitting pipes.
3. Line consists of 2 heat-treatment units for thermal treatment of coils with diametеr 5,5-50 mm for spheroidizing and soft annealing in neutral protective atmosphere of nitrogen.