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Aging of cast iron castings and heat treatment of welded structures in bogie hearth gas chamber furnace

Heat treatment of castings and forgings


 

Welded seams local heat treatment  fulfilment

     Currently, JSC “SMNPO – Engineering” has the ability to provide services for heat treatment of blanks, parts and welded structures according to the modes and technological processes of the Customer:

 1. For rough blanks (castings, forgings and rolled blanks):

  • Aging (for cast iron casting);
  • Annealing;
  • Normalizing.
 2. For pre-treated products:
  • Quenching (in water or oil);
  • Tempering for stress relieving.
 3. For welded structures:
  • Tempering for stress relieving;
  • Local heat treatment (Tempering) of  welded seams.

  

When performing heat treatment, unique modern gas and electric furnaces (shaft, chamber and bogie hearth furnaces) with a maximum heating temperature of up to 1100 °C, as well as units for local heating with a maximum heating temperature of up to 700 °C are used.

Maximum working dimensions of the equipment being used:

aging of cast iron casting3500 × 7500 × 3000 mmmax weight up to 20 t

annealing and normalizing

2900 × 4000 × 800 mmmax weight up to 10 t
quenching in water 2900 × 4000 × 800 mmmax weight up to 10 t
quenching in  oil2700 ×  3000 × 1700 mm
max weight up to 5 t
shaft quenching in water
Ø500 × 7000 mmmax weight up to 7 t
shaft quenching in oilØ500 × 7000 mmmax weight up to 5 t
welded structures tempering 5000 × 8000 × 3000 mmmax weight up to 50 t

    

   Also, JSC “SMNPO – Engineering” has the necessary equipment to perform local heat treatment (tempering for stress relieving after welding) of welded seams with  total length of up to 9000 mm and seam thickness of up to 90 mm.