A Guide to Heat Treatment Solutions
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 a few cases, this process is done inadvertently as a result of the manufacturing approach which could either heat up or cool the metal like welding or forming. We discuss some of the heat treatment solutions below which will increase your knowledge in the field.
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. In full annealing, the material is heated up to a temperature where the carbide becomes a solution either partially or fully and is then cooled down. Sub critical annealing occurs at a temperature below the temperature where the carbide begins to become a solution.
Structural changes are as a result of the ageing process. Typically, this happens in specific metals and alloys at atmospheric temperature or temperatures which are high. Ageing has different effects; proof stress, hardness values and maximum stress increase while the ductility goes down. 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 procedure which includes introducing carbon to the steel’s surface area which has a low carbon content. It might be done by heating it in a solid, liquid or gaseous medium that has carbon. When conducted in high temperatures, it offers a supply of carbon which the carburized substance supplies. 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. 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.
Heat treat is used in steel hardening in the process of induction hardening. 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 a method of heat treatment which requires heating to and when needed even maintaining the same at a temperature which is then followed by cooling down is air which is still. The purpose of this is to facilitate faster cooling at a medium level.