Why annealing in bell type annealing furnace

Bell type annealing furnace is indispensable in our current industrial production. Whether the annealing furnace price in industrial work or in environmental protection and energy saving, there is a place for bell type annealing furnace. It belongs to the bright annealing process. Before returning the product, the air in the tank is pumped out, nitrogen or inert gas is poured in, and then it is electrified and heated. It is burnt to what degree, maintained at what degree for how long, and then gradually cooled naturally. There is a complete set of annealing temperature control curve. Annealing furnace price

The bell type annealing furnace has the advantages of novel structure, bright furnace temperature, uniform annealing furnace, high thermal efficiency, low energy consumption, fast cooling speed, less gas consumption, convenient operation and high degree of automation. After the product is equipped with appropriate protective atmosphere, it can make the surface of the treated material bright and free from oxidation, and effectively prevent decarburization on the steel surface and dezincification on the copper surface This product is widely used in bright annealing of black and non-ferrous metal strip, wire rod and coil, and stress relief annealing of transformer core and magnetic material parts.

So why annealing?

1. Microstructure of cold rolled sheet after cold rolling deformation, grain elongation, grain breakage and a large number of crystal defects occur in the internal structure of the metal, resulting in the increase of free energy in the metal, which is in an unstable state, with the trend of spontaneous recovery to a relatively complete, regular and low free energy stable state. At room temperature, the atomic kinetic energy is small, the diffusion force is poor, and the diffusion speed is slow, which leads to this tendency can not be realized. The activation force is to heat the steel to a certain temperature, so that the atoms can obtain enough diffusion kinetic energy, eliminate lattice distortion, and change the structure and properties. Therefore, the cold rolled steel must be annealed.

2. The purpose and function of annealing is to heat the strip to a certain temperature and then cool it. Annealing of cold rolled strip is one of the main heat treatment processes in cold rolled strip production.