Annealing is a kind of metal heat treatment process, which means that the metal is slowly heated to a certain temperature for enough time, and then cooled at a suitable speed, sometimes natural cooling, sometimes controlled speed cooling.
The purpose of annealing is to reduce hardness, soften workpiece and improve machinability. It can improve or eliminate all kinds of structural defects and residual stress formed in the process of casting, forging, rolling and welding, and reduce the deformation, cracking or cracking tendency of the workpiece.
Grain refinement and microstructure improvement can improve the mechanical properties of the workpiece and eliminate structural defects.
Average the microstructure and composition of the data, improve the properties of the data, or prepare the microstructure for subsequent heat treatment, such as annealing and tempering.
In practical consumption, annealing process is widely used. According to the purpose of workpiece annealing, there are many kinds of annealing process, such as complete annealing, spheroidizing annealing, stress relief annealing, etc.
Application of annealing furnace: annealing furnace series industrial furnace is widely used in casting, metallurgy, automobile, aerospace, military industry, shipbuilding, light industry, electric power and other industries.
It can be used for various metal work pieces such as high chromium and high manganese steel castings, gray iron castings, rolls, bearings, steel balls, wear-resistant lining plates, etc.
The annealing furnace is made of square or round furnace body structure. The furnace is equipped with refractory brick and aluminum silicate fiber composite insulation, or with full fiber insulation furnace lining structure.
The workpiece is placed in the furnace and heated by electric heating or oil and gas. The workpiece is heated to the required annealing process temperature in the natural atmosphere or maintenance atmosphere. After holding for a period of time, it will be natural Cooling or controlled speed cooling.
