Annealing and normalizing
The annealing heat treatment process is mainly used on alloy steels and copper. The metal alloy is heated to a temperature that is usually lower than its melting temperature and is then cooled slowly. The aim of annealing is to achieve a chemical, structural or mechanical balance of the material. Annealing reduces the material’s hardness and increases its ductility.
Normalizing is a heat treatment that involves heating the material to a high temperature, maintaining that temperature for approximately 15 minutes and then cooling the material in calm air. The aim of this process is to refine and homogenise the crystalline grain and eliminate the tensions caused by plastic deformation processes. This is necessary so that steels can be subjected to further heat treatments. The normalizing process is used to treat parts for the mechanical industry, including rolled steels, castings, forgings, carbon and low-alloy steel castings.
Continuous annealing and normalizing ovens
These treatments typically take place inside continuous annealing and normalizing ovens that can reach temperatures of approximately 900°C. The material to be treated moves inside the continuous ovens on conveyor belts made in special materials to withstand high temperatures.
Costacurta’s conveyor belts for high temperatures are dimensioned based on the operating conditions, the size of the parts to be treated and the workload and are normally made in stainless steel 314 (W. Nr. 1.4841), NiCr 37/18 (W. Nr. 1.4864).
Distinctive characteristics of the Costacurta conveyor belts for continuous annealing and normalizing ovens:
- Precision of the mesh geometry and quality of the alloys used
- Wide range of mesh available