Heat Treatment
Heat treatment is the heating too cooling of metals to alter their physical too mechanical properties,without changing its shape.
Grain structure changes alongside the application of oestrus too method of cooling. This induces desired properties inwards the steel.
It is applicable to plain carbon steel, alloy steel equally good equally not ferrous materials similar aluminum too copper.
Heat handling enhances properties similar Hardness, Toughness, Strength & ductility.
Types of Heat Treatment Processes
- Hardening
- Tempering
- Annealing
- Normalizing
- Surface Hardening ( Carburizing & Nitriding )
Hardening
Heating Process : The metallic is heated at a high temperature and this temperature is maintained until a proportion of carbon has been dissolved inwards to the metal.
Cooling Process : The metallic is quenched, which involves quickly cooling it in oil or water.
Results : high forcefulness too article of apparel resistance. However hardening volition equally good increase brittleness
Cooling Process : The metallic is quenched, which involves quickly cooling it in oil or water.
Results : high forcefulness too article of apparel resistance. However hardening volition equally good increase brittleness
Tempering
Heating Process : It is a low temperature oestrus handling process normally performed later on hardening( double hardening ).
Cooling Process : cooling inwards air.
Results : Ductility inwards increased , tougher too less brittle steel.
Annealing
Cooling Process : cooling inwards air.
Results : Ductility inwards increased , tougher too less brittle steel.
Annealing
Cooling Process : cooling slowly at a controlled rate.
Results : Annealing is oft used to soften metals including iron, steel, copper, brass too silver. It increase ductility and reduce hardness. This facilitates shaping, stamping or forming processes, too allows the metallic to move cutting to a greater extent than easily. Annealing equally good enhances electrical conductivity.
Heating Process : The metallic is heated to a predefined temperature.
Cooling Process : cooled past times air.
Results : Greater forcefulness too hardness. Typically, the normalising procedure is performed on materials that volition move subjected to machining.
Carburizing
It is a oestrus handling procedure inwards which iron or steel absorbs carbon piece the metallic is heated inwards the presence of a carbon-bearing stuff such equally carbon monoxide. The intent is to make the metallic harder. Not the whole metal-piece but surely outer thickness exclusively tin move carburized.
Nitriding
It is a oestrus handling procedure that diffuses nitrogen into the surface of a metal to create a representative hardened surface. These processes are nearly commonly used on depression to medium carbon & low-alloy steels.