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. We discuss some of the heat treatment solutions below which will increase your knowledge in the field.
Annealing is a method of steel heating and maintaining the temperature of the material at a specific temperature by cooling it down to a suitable rate. This increases features such as the machinability, softness and cold working attributes of the steel and even helps in removing the stresses of the material and thus it obtains the right 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 occurs at a temperature below the temperature where the carbide begins to become a solution.
The procedure of ageing results in structural changes. This usually takes place in definite metals and alloys at high temperatures or atmospheric temperature. Ageing has different effects; proof stress, hardness values and maximum stress increase while the ductility goes down. There are some cases where ageing is gotten by heating at a high temperature. This is usually referred to as artificial ageing and its result is 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 conducted in high temperatures, it offers a supply of carbon which the carburized substance supplies. The carbon concentration and its depth in the steel surfaces are changed by controlling the time and temperature which are needed by the heat treatment.
Hardening is a procedure which improves the hardness of the steel though the use of heat. Typically, this means heating to a temperature which is above the critical range by keeping the temperature where the diffusion is done by quenching in oil. air, or water.
In the process of induction hardening, the steel is hardened by heat treat. It is done by alternating a magnetic field to that of the temperature which is above or close to the transformation range then quenching follows it.
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 allows the cooling to occur quickly at a medium level.