Why You Need Metal Hardening and Treatment
It is essential to know the difference between steel hardness and steel hardenability especially when it comes to steel modification. Hardenability focuses more on how a given type of metal can harden if it were subjected to extreme levels of heat. Steel hardening can only become as hard as the carbon content in the steel in question. One would need to know that the higher the carbon content, the higher the chances that the steel in question will be hard.
A specialist would have an easier time predicting how hard a given metal can become in a chase where he or she knows the hardenability characteristics of the metal in question. One would need to know that metal hardening tends to involve ductility and toughness of the metal. Tempering, on the other hand, tends to call for heating a metal that has already been heated and then holding the metal in question on some specific temperatures before cooling it. One would also need to know the benefits of preheating a metal to reduce brittleness created by the first heating as well as allowing the carbon content to precipitate into carbide particles.
One would also need to know that strengthening of the metal may also call for solid solution hardening, transformation hardening, cold working, among other processes. Precipitation hardening tends to be perfect when it comes to the development of high strength steel and also tends to be used in aluminum alloy. On the other hand, cold working of a metal tends to deform it and stress its crystal structures making the metal in question to become harder. Due to the fact that the metal tends to become brittle in these processes, there tends to be a need to temper the metal in question to prevent instances where it cracks or split.
Solid solution tends to focus on decreasing ductility and at the same time increasing strength of a metal. Transformation hardening on the other end tends to adjust the ductility and strength of a metal with the intention of meeting some given application requirements. The main intention of metal heat treating is to make sure that the grain structure changes. The concurrent heating and cooling processes tends to focus on changing the metal properties adding value, applicability and durability of the metal in question.
In some cases, the only metal that demands hardening includes the metal at the outermost layer and leave the metal at the core soft. The process tends to involve adding of carbon under high temperature up to a specific depth making the metal in question harden from the exterior. Hot isostatic pressing is yet another process that tends to involve usage of argon in high pressure and temperature. HIP tends to be used in improving metals used in the aircraft engines and components.