• Normalising – the goal is to soften the rough and uneven primary structure to achieve optimal mechanical properties for the particular material, at the least possible tension inside the casting.
  • Homogenisation annealing – reduces the differences in chemical composition, and induced dendritic and band dissolving through mixing and improvement of the homogeneity of the casting.
  • Quenching and tempering – achievement of a controlled amount of hardening structures, particularly martensite, respectively bainite.
  • Stress relieving – removing a large part of the internal stresses in castings which are the result of both contraction and uneven cooling of strong and weak parts of the casting in the mould.
  • Soft annealing – facilitating finishing of castings, including prevention of cracking when firing risers and improvement of machining capability.
  • Stress relieving after welding – removing tension after production welding.
  • Homogenisation of welded sections and achievement of minor differences in hardness of the base metal, transition layer and weld metal.
  • Ferritisation annealing – possibility to change the structure of the base in nodular cast iron, remove the vitreous after burning, welding, etc.

Furnace equipment

Number Type Dimensions (m) Typemark
3 Annealing gas furnace 8×4×2.5 Škoda CZ
1 Annealing gas furnace 8.5×4x2.4 TTP CZ
1 Annealing car-type furnace 6×3×2.5 TATRA CZ
1 Continuous annealing furnace 5.5×2.4×1.5 TATRA CZ
1 Annealing electric furnace 3×2×1.2 Realistic CZ
1 Electric filling furnace Ø 2.05x1 Realistic CZ
2 Electric pit furnace Ø 0.5x0,9 EZ SR
2 Electric chamber furnace 1.5x1x0.6 EZ SR
1 Electric inlet furnace Ø 0.7x0.8 EZ SR
1 Electric car-type furnace 2.5x1x1 Realistic KV
3 Tempering furnace with a neutral atmosphere