Grieve No. 954 is an electrically-heated 2,000°F (∼1,093°C) inert atmosphere heavy-duty box furnace from Grieve used for heat treating titanium at the customer’s facility. 57 KW are installed in nickel chrome wire coils, supported by vacuum-formed ceramic fiber, to heat the load. Workspace dimensions are 30” wide x 48” deep x 30” high. The oven’s 7-inch-thick insulated walls comprise 5 inches of 2,300°F ceramic fiber and 2 inches of 1,700°F ceramic fiber, while the 6-1/2-inch floor insulation comprises 4-1/2 inches of 2,300°F firebrick and 2 inches 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-pound capacity alloy loading cart with cast alloy roller rails, 3-1/2-inch diameter cast alloy rollers, and a roller rail loading table with 4-inch diameter cast iron rollers.
This Grieve furnace also 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 flowmeter.
Controls onboard No. 954 include a digital programming temperature controller, manual reset excess temperature controller with separate contactors, plus a strip chart recorder.
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