Improved machinability: Annealing reduces the hardness of the metal, making it easier to perform machining operations such as bending and stretching, and less prone to breakage. The annealing process removes some of the internal stresses, making the metal smoother to machine and reducing the risk of cracking or fracture. In addition, annealed metal performs well when welded, with superior weld qua
Author:Robby
The main reasons for annealing in the continuous galvanising process include the following:
Improvement of the adhesion and quality of the galvanised layer: the annealing treatment removes internal stresses within the metal, resulting in a more stable crystalline structure, which in turn improves the smoothness of the surface. This smooth surface is more conducive to the uniform adhesion of the galvanising layer, reducing pores and defects and the risk of corrosive media penetrating the metal substrate. At the same time, annealing also enhances the adhesion between the galvanised layer and the metal substrate, ensuring that the galvanised layer is not easily removed during use and always provides effective protection for the metal substrate.
Improved machinability: Annealing reduces the hardness of the metal, making it easier to perform machining operations such as bending and stretching, and less prone to breakage. The annealing process removes some of the internal stresses, making the metal smoother to machine and reducing the risk of cracking or fracture. In addition, annealed metal performs well when welded, with superior weld quality, as the annealing helps to remove internal stresses and reduces the risk of cracking during the welding process.
Avoiding poor plate shape: In the continuous galvanising process, annealing avoids the problem of poor plate shape caused by excessive cooling rates. Annealing gives the strip a better plate shape and a more uniform temperature, which improves the quality of the galvanising when it enters the galvanising pot.