July 22, 2014
Grieve has developed No. 965, a 1,350-degrees-F, electrically heated cabinet oven used for heat-treating titanium. The unit’s workspace is 24 by 24 by 24 in. Nickel-chrome wire coils supported by a stainless steel frame deliver 30 kW to heat the oven, while a 1,300-CFM, 1.5-HP alloy recirculating blower provides horizontal airflow to the workload.
The cabinet oven features 11-in.-thick insulated walls comprising 2 in. of 1,900-degrees-F block and 9 in. of 10 lb./cf density rockwool insulation. Other features include an aluminized steel exterior, Type 304 2B finish stainless steel interior, plus inner and outer door gaskets, with the inner gasket sealing directly against the door plug and the outer gasket sealing directly against the face of the oven.
Controls include a digital indicating temperature controller, manual reset excess temperature controller with separate contactors, recirculating blower airflow safety switch, 10-in.-dia. circular chart temperature recorder, and an SCR power controller and fused disconnect switch.