Inert atmosphere tempering furnace reaches 1,400 degrees F

Grieve has developed No. 1041, a 1,400-degrees-F inert atmosphere tempering furnace currently used for heat-treating at a customer’s facility. Workspace dimensions are 48 by 72 by 48 in. 120 kW are installed in nickel-chrome wire coils supported by a stainless steel frame, while a 9,600-CFM, heat-resistant-alloy recirculating blower powered by a 15-HP motor provides vertical upward airflow.

The oven has 7-in.-thick insulated walls comprising a 5-in.-thick, 2,300-degrees-F ceramic fiber blanket and 2-in.-thick, 1,900-degrees-F block insulation. Features include inner walls clad with 304 stainless steel, 304 stainless steel ductwork, and a stainless steel subway grating hearth. Other features include a ¼-in. plate steel exterior reinforced with structural steel, ½-in. steel face plate at the doorway, and an air-operated vertical lift door.