Wheel and Axle plant
Pride of Durgapur steel plant. Major supplier of wheels to
Indian railways. Commissioned in 1962. Wheels and axles
manufactured by forging followed by machining.
Wheel plant Raw materials :o 12 sided flutted bottom poured
steel ingots with diameter of 16 or 14 . o Chemical composition : C
= 0.62 to 0.68 % , Mn = 0.70 to 0.85% Si = 0.24 to 0.28 % , P
=0.045 and S = .04 %
Rough shaping of wheel Flutted ingots sliced into 4 blocks of
which 3 used. Ingot blocks (cheese) free fromo circular cracks o
Bottom cracks o Cold shunts Heated in rotatory hearth (A) furnace
of 1220 C for 6Hrs.
63 / 12 Mn. Forging and Punching combination press. Heated to
1200 C in batch type holding furnace B. Computerised wheel rolling
One thread roll shape n thread profile Two web roll shapes the web
portion Two edge roll rim thickness
20Mn. DISHING PRESSo Web form changed from flat ring to
truncated cone slopping from boss to rim. Serial no. , year and
cast numbers stamped in
HEAT TREATMENT : Spraying is done depending on C
equivalent.>78 - heat to 860 C and cool to room temp. =78 -
spraying time 50seconds.