Grieve’s No. 954 inert atmosphere box furnace heats to 2,000°F (1,093°C) and is intended for heat treating titanium. The oven features 57 kW installed in nickel chrome wire coils and supported by vacuum-formed ceramic fiber to heat the load.
The unit’s workspace measures 48" × 30" × 30". Its 7"-thick insulated walls are comprised of 5" of 2,300°F ceramic fiber and 2" of 1,700°F ceramic fiber, while the 6-1/2" floor features 4 1/2" of 2,300°F firebrick and 2" of 1,200°F block insulation. The oven features a 100-lb capacity alloy loading cart with cast alloy roller rails, 3 1/2"-diameter cast alloy rollers and a roller rail loading table with 4"-diameter cast iron rollers.
The furnace’s inert atmosphere construction consists of a continuously welded outer shell, high-temperature door gasket, sealed heater terminal boxes, inert atmosphere inlet and outlet, and inert atmosphere flow meter. The unit also is equipped with a roof-mounted, heat-resistant alloy recirculating fan powered by a 1-hp motor with V-belt drive. Controls include a digital programming temperature controller, manual reset excess temperature controller with separate contacts, and a strip chart recorder.