RKFL has atmospheric controlled sealed quenching furnaces. It has also undertaken Plug Quenching and Carburisng meticulously upto the desired case depth as desired by the clients. State-of-the-art hardening and tempering furnaces are PLC controlled and have integral graphic recorder.
We use Induction Heaters for our Forgings and also in Ring Rolling. RKFL has a fully automated Induction heater of Inducto Heat/Induction Therm make with pyrometer fitted capable of accept and reject mechanism.
In the new Press Plant the Furnace is run by SCADA control system and entire heat treatment is automatic.
The furnace is a continuous process pusher type of furnace; the hardening is gas propane heated and the tempering is electrically heated.
Pyrometer (TUS) & System Accuracy Test (SAT) conducted at specified frequency and as per CQI9. At RKFL CQI9 Audit is conducted at regular intervals.
Individual cooling from forging temperature to 600 +/- 25oC. Uncontrolled cooling follows this. The structure of the steel shall be pearlite ferritic. Bainite content max 10%.
Sourcing: Customer approved source & Customer Approved Alloy Design
#Austenite grain coarsening is also controlled by controlling Time-Temperature in induction billet heaters
Typical parameters for the hot forging of the Microalloy Steel
To control the cooling the conveyor will be equipped with forced draft & induced draft.
Grain size (As per ASTM E112-12) : ASTM 6
Matrix of ferrite & pearlite with no bainite.
#The above material was found acceptable with all respect
By virtue of being a Higher Vanadium grade (0.16-0.22%), this steel is susceptible to bainitic precipitation and hence would be needing a lower cooling rate compared to a lower Vanadium grade (0.08-0.13%)
An well equipped Metallurgical Laboratory facility shall be an advantage in perfect and timely evaluation and control of mechanical and micro-structural properties.
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