German furnace builder SARNES Ingenieure GmbH & Co KG has reported that, in addition to its belt furnaces for sintering, debinding, steam treating and hardening, it has developed an all new annealing furnace system for heat treatment.
Frank Sarnes told Powder Metallurgy Review, “Our new annealing furnaces, with a belt width of 1000 mm or more, have improved convection heat transfer to achieve a remarkable precise temperature profile, which also covers the requirements of AMS 2750D for the aviation industry. The in-built waste gas combustion and an optional high pressure cooling zone allow heat treatment under air and protective atmospheres. Beside a +/-1°C temperature variation over the belt width, this high convective heating system offers energy consumption of only 30% compared to many other systems.”
The annealing belt furnaces are built using a modular system of 4 m or 8m lengths, with 4 m or 8 m convective cooling zones. The company stated that the post burning chamber can adjusted for light hydrocarbons or even heavy coal tar for carbon sintering applications.