Induction annealing is a special heat treatment process, heating the metal or alloy to an appropriate temperature, holding it for a certain period of time, and then slowly cooling. The essence of annealing is to heat the steel to austenitize and transform into pearlite, and the structure after annealing is close to the equilibrium structure.
Annealing methods are divided into:
Phase change recrystallization annealing above the critical temperature (Ac1 or Ac3): complete annealing, diffusion annealing, incomplete annealing, spheroidizing annealing.
Annealing below the critical temperature (Ac1 or Ac3): recrystallization annealing, stress relief annealing.
ROCHO INDUCTION provides induction annealing system, which is mainly used for preliminary heat treatment. For parts with little stress and low performance requirements, annealing and normalizing can also be used as final heat treatment. The purpose of induction annealing process is:
(1) Reduce the hardness of steel, improve plasticity, and facilitate machining and cold deformation processing.
(2) Uniform the chemical composition and structure of the steel, refine the grain, improve the performance of the steel or prepare the structure for hardening.
(3) Eliminate internal stress and work hardening to prevent deformation and cracking.
