Heat treatment furnaces are divided into annealing furnaces, quenching furnaces, tempering furnaces, normalizing furnaces, and quenching and tempering furnaces. They are mainly used for annealing large carbon steel and alloy steel parts; tempering surface quenching parts; and stress relief for welding parts. Annealing, aging and other heat treatment processes. Heating methods include electric heating, oil, gas, coal, and hot air circulation. Annealing furnace is a new type of heat exchange equipment. The annealing furnace is an energy-saving periodic operation furnace with a super energy-saving structure. It adopts fiber structure and saves 60% of electricity.