Inert Atmosphere Box Furnace
No. 954 is an electrically heated 2000°F inert atmosphere heavy-duty box furnace from Grieve to be used for heat treating titanium. To heat the load, 57 kW are installed in nickel-chrome wire coils, supported by vacuum-formed ceramic fibers. Workspace dimensions are 30 inches wide x 48 inches deep x 30 inches high. The oven’s 7-inch-thick insulated walls comprise 5 inches of 2300°F ceramic fiber and 2 inches of 1700°F ceramic fiber, while the 6.5-inch floor insulation comprises 4.5 inches of 2300°F firebrick and 2 inches of 1200°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-pound-capacity alloy loading cart with cast alloy roller rails, 3.5-inch-diameter cast-alloy rollers and a roller rail loading table with 4-inch-diameter cast iron rollers. This furnace also features inert atmosphere construction, which consists 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. It also includes a digital programming temperature controller, manual reset excess temperature controller with separate contactors and a strip chart recorder.