The so-called annealing line is the steel annealing, steel annealing after convenient processing. Annealing is a metal heat treatment process, which means that the metal is slowly heated to a certain temperature, held for a sufficient time, and then cooled at a suitable rate.
The purpose of steel annealing is to reduce the hardness and improve the machinability; Eliminate residual stress, stabilize size, reduce deformation and crack tendency; Refine the grain, adjust the structure, eliminate the defect of the structure.
How is the steel annealed?
Steel annealing: softening the material or workpiece after casting, forging rolling, welding or cutting, improving plasticity and toughness, homogenizing chemical composition, removing residual stress, or obtaining desired physical properties. There are many kinds of annealing processes according to different purposes, such as isothermal annealing, homogenization annealing, spheroidization annealing, stress removal annealing, recrystallization annealing, stabilization annealing, magnetic field annealing and so on.
Steel annealing characteristics:
1.the use of metal tools due to heat and lose the original hardness.
2.the metal material or workpiece heated to a certain temperature and continue for a certain time, so that the slow cooling. Annealing can reduce metal hardness and brittleness and increase plasticity. Also called braised fire.
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