Annealing and quenching is an important step in industrial production, generally in heat-resistant steel castings, precision castings, and other industrial production in all need annealing and quenching, can improve the performance of metal.Annealing and quenching way of diversity, in the process of industry to choose the right way.1, completely annealing annealing way: full annealing and weighing annealing crystallization, commonly referred to as "for annealing, is mainly used for the annealing of hypoeutectoid composition of carbon steel and alloy steel casting, forging and hot rolled profiles, sometimes used for welding structure.Generally used as a final heat treatment, not heavy piece or as a preliminary heat treatment in some artifacts. 2. The spheroidizing annealingSpheroidizing annealing is mainly used for hypereutectoid steel and alloy tool steel (such as manufacturing cutters, measuring tool, mold used steel grade).The main purpose is to reduce the hardness and improve cutting workability, and to prepare for after quenching.