Inert Atmosphere Box Furnace for Heat Treating

Grieve’s No. 954 is an electrically-heated, 2,000°F inert atmosphere box furnace, suitable for heat treating titanium. To heat the load, 57-kW nickel chrome wire coils are supported by vacuum-formed ceramic fiber. Workspace dimensions measure 30" × 48" × 30". The oven’s 7"-thick insulated walls comprise 5" of 2,300°F ceramic fiber and 2" of 1,700°F ceramic fiber, while the 6.5" floor insulation comprises 4.5" of 2,300°F firebrick and 2" of 1,200°F block insulation.

 

The unit is equipped with a roof-mounted, heat-resisting alloy recirculating fan, powered by a 1-hp motor with V-belt drive, motor-operated vertical lift door, 100-lb capacity alloy loading cart with cast alloy roller rails, 3.5"-diameter cast alloy rollers and a roller rail loading table with 4"-diameter cast iron rollers. It features inert atmosphere construction, consisting of a continuously welded outer shell, high temperature door gasket, sealed heater terminal boxes, inert atmosphere inlet, inert atmosphere outlet and inert atmosphere flow meter. The control system includes a digital temperature controller, manual reset excess temperature controller with separate contactors, plus a strip chart recorder.