"Heat treatment is a method that involves applying heat to a product to alter its solid-state structure, sometimes causing changes in the chemical composition and properties of the material. Its primary application is in the field of metallurgy.
The essence of metal heat treatment is to change properties through the transformation of material organization. A heat treatment process consists of three stages: Heating, holding temperature, and cooling. During heating, the material's organization changes with temperature, and depending on the timing of heating and cooling at different rates, various heat treatment methods will yield the desired material properties."
