Large gas normalizing furnace is the national standard energy-saving cycle type operation furnace, super energy-saving structure, energy-saving effect of 65%. The trolley adopts anti-impact sealing brick, the furnace door adopts spring type pressing mechanism, and automatically seals the trolley and the furnace door. The integrated rail connection does not require basic installation, and can be used on the horizontal ground. Mainly used for high chromium, high manganese steel castings, ductile iron, roll, steel ball, 45 steel, stainless steel and other quenching, annealing, aging and various mechanical parts of the heat treatment.