What does annealing mean? Where can induction annealing furnaces be used?

In the process of heat treatment, it is necessary to go through the process of annealing. At this time, an induction annealing furnace is used. Next, Kehua will take you to understand what annealing means, and where can induction annealing furnaces be used? What does induction annealing furnace annealing mean? Annealing refers to a heat treatment process in which materials are exposed to high temperature for a long time, and then slowly cooled. . The main purpose is to release stress, increase material ductility and toughness, and produce special microstructures. Annealing is divided into complete annealing, incomplete annealing and stress relief annealing, diffusion annealing, spheroidizing annealing, and recrystallization annealing. The mechanical properties of annealed materials can be tested by tensile test or hardness test. Many steels are supplied in the state of annealing and heat treatment. The hardness of the steel can be tested with a Rockwell hardness tester to test the HRB hardness. For thinner steel plates, steel strips and thin-walled steel pipes, a surface Rockwell hardness tester can be used to test the HRT hardness. .Heating the steel to a certain temperature above or below the critical point Ac1, holding it for a period of time, and then slowly cooling it in a furnace or buried in a furnace or a medium with poor thermal conductivity to obtain a stable structure close to the equilibrium state . Induction annealing furnace Application range of induction annealing furnace Induction annealing furnace is widely used in steel pipe weld annealing, recrystallization annealing of workpieces after cold heading (such as high-pressure oil pipe connection core), and some workpieces that require local annealing after carburizing (For example, motorcycle connecting rod, threaded part of spline shaft, etc.). The annealing of the steel pipe weld makes the coarse and uneven grains of the weld be normalized to obtain fine grains; the local annealing of the cold heading workpiece restores the elongated grains after cold heading to fine and uniform grains, so as to prevent the workpiece from being damaged. Some parts are resistant to damage due to reduced mechanical properties in use: local parts of carburized parts, such as threaded parts, are annealed, mainly to reduce the hardness of this part. Induction annealing is a relatively advanced annealing technology and has been welcomed by many companies. After reading Kehua's introduction, I believe everyone already knows where induction annealing furnaces can be used.