Well furnace quenching (tempering) furnace is widely used in all kinds of rod, long shaft and required surface parts such as gear, roll, etc. Well quenching (tempering) furnace is a metal heat treatment process in which the metal workpiece is heated to a certain appropriate temperature and maintained for a period of time, and then immersed in the quenched medium for rapid cooling. Commonly used quenching media are salt water, water, mineral oil, air and so on. The shell of the furnace body is welded into a frame structure by section steel and steel plate. The opening and closing of the furnace cover can be done by line hoist, manual pole and electro-hydraulic. Lining: can be used ordinary or full fiber structure, the furnace mouth using the furnace mouth retainer, the purpose is to use the Lei hook workpiece rack and protect the furnace mouth from being damaged by the workpiece, so that the heat is not lost, so as to ensure the uniformity of the furnace temperature.