heat treatment.

Our lift off cover type furnace has a load capacity of 5.3 tonnes, it is also capable of handling (W)1,500mm x (D)1,500mm x (H)1,100mm. The temperature range of the furnace is 600°C to 1,250°C and the temperature uniformity achieved is between 600°C to 800°C ±8°C and over 800°C to 1,250°C at ±14°C this meets the specification requirements of NORSOK M650 Rev 4 2011 (Temperature Uniformity Surveys are performed annually along with calibrations performed every 3 months). Once fired up the furnace uses two self-recuperating high velocity gas burners mounted at low level, in diagonally opposite corners of the furnace hood. The furnace hood is hydraulically raised and lowered in seconds automated in time to ensure a safe fast quench of the load.

Meets the specification requirements of NORSOK M650 Rev 4 2011.

In front of the furnace for a rapid quench is a (W)3,400mm x (L)3,800mm x (D)3,950mm tank holding 51,000 litre of water with high velocity agitation jets. The volume of water is calculated to prevent the water from exceeding 50°C from a starting temperature of max 20°C water temperature when quenching a 5.3 tonne load of castings including the tray from 1,250°C. The water is vigorously agitated from two sides and from below using a multi-jet, high velocity agitation to break down the water vapour barrier and increase heat transfer between the casting and the quenchant. The agitated water is circulated by two 30kW pumps at 108ltr/sec, positioned in an underground service pit and controlled by variable speed drive controlling the quench jet intensity. The system incorporates a circulation pump and a sealed cooler capable of a cooling capacity of 370kW. Water at 50°C is capable to return to the quench at 15°C with an ambient temperature up to 32°C. The water is pumped through the plate exchanger where it is cooled then back to the quench tank.

The quench tank holds 51,000 litre of water with high velocity agitation jets.

Loading and unloading of the furnace is by a 5.3 Tonne capacity single sided, fully automated, 4-wheel drive single sided charging machine. The operator transfers the load to a dedicated high temperature alloy tray positioned on a loading table. The operator exiting the fenced off facility, activates new or pre-programmed heat treatment cycles. The time for opening the door to total immersion of the load into the quench is critical and achieved in less than 30 seconds.