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Heat Treatment Line for Railroad Casting

Heat treatment line for railroad casting enables heat treatment of cast bars - side frame and bolster - for equalizing chemical inhomogenei-ty and grain size and obtaining mechanical properties specified by OST-32-183-2001.

When using this heat treatment technology a full phase recrystallization of 20GFL and 20GL steels occurs. By grain refining, relieving internal stresses and reducing structure inhomogeneity heat treatment facilitates an increase in plasticity and viscosity of products compared to mechanical properties received after casting. 

Process Equipment

  • Heating furnace
  • Original cooling box
  • Holding furnace
  • Secondary cooling box
  • Transportation system: cars, transborders, pushers, pulling head, rail tracks; car fixing devices.

 

           

 

Technical Parameters

 Capacity, pcs/h

10

 Furnace heating

Electric

 Operation mode

Three-shift

 Annual working time fund, h/y

6000

Technical features of blanks to be heat treated

 Overall dimensions, mm

 

Side frame

2413х671х580

Bolster

2590х480х486

 Maximum wall thickness, mm

35

 Weight, kg

 

Side frame

399

Bolster

520

 Material

20G1FL, 20GL steel as per GOST 977-88

 Chemical composition, %

С - 0.14...0.21; Si - 0.5...0.8; Mn - 0.9...1.3;
V - 0.07...0.13; S - up to 0.03; Р - up to 0.035

Utilities

 Voltage, V/Hz

~380/50

 Water, kgf/cm²

5

 Temperature, °С

12 - 25

 Compressed air, kgf/cm²

6