The heat treatment process entails controlled heating and then cooling the metals with an objective of changing their mechanical and physical properties without changing their shapes. In some instances, this process is carried out inadvertently because of the method used in manufacturing which could either heat up or cool the metal for example forming or welding. Below are some heat treatment solutions so as to grow your knowledge.
Another method of heating steel is annealing and it keeps it to a particular temperature by cooling down at a suitable rate. This enhances the softness, machinability and cold working features of the steel and even aids in eliminating the stresses of the material thus it gets the desired structure. The material is heating up to a specific temperature in full annealing and thus the carbide turns into solution either fully or partially and then it is cooled down. Sub critical annealing takes place at a temperature that is a bit lower than the temperature where the carbide starts tuning into a solution.
The process of ageing is one that leads to structural changes. Typically, this happens in specific metals and alloys at atmospheric temperature or temperatures which are high. As a result of ageing, hardness values, ageing, and maximum increase while the ductility lowers. There are particular conditions in which ageing is achieved through heating at an elevated temperature. This is normally called artificial ageing and it leads to precipitation hardening.
Carburizing is a process that involves introducing carbon into the surface layer of the steel which does not have a high carbon content. It might be achieved by heating it in a solid, gaseous or liquid medium which includes carbon. When carried out at high temperatures, it gives a carbon supply which will be absorbed by the carburized substance. The concentration of the carbon and the depth which is in the surfaces of the steel is altered by managing the time and temperature required by the heat treatment.
Hardening is a procedure which improves the hardness of the steel though the use of heat. Normally, this implies heating to a temperature which is more than the critical range by maintaining the temperature at a range where diffusion will be achieved by quenching in air, oil or water.
In the process of induction hardening, the steel is hardened by heat treat. It is undertaken by alternating a magnetic field to that of a higher temperature or that which is close to the range of transformation and then quenching follows.
Normalizing is an approach used in used treatment which necessitates heating to and when required even keeping the same at a temperature which is then followed by cooling down the still air. This provides for quicker cooling at a medium level.