LõõmutamineIsotermiline

LõõmutamineIsotermiline, also known as isothermal annealing, is a heat treatment process used to alter the microstructure and properties of materials, particularly metals. This process involves heating the material to a specific temperature and holding it there for a period of time, followed by cooling. Unlike continuous cooling annealing, isothermal annealing involves distinct holding stages at specific temperatures.

The core principle of lõõmutamineIsotermiline is to allow microstructural transformations to occur completely at a constant temperature. Typically, the material is heated to a temperature above its transformation range, then rapidly cooled to a lower temperature below the transformation range but above the final desired temperature. This lower temperature is then held isothermally until the desired transformation is complete. Finally, the material is cooled to room temperature.

This method offers precise control over the resulting microstructure. For steels, isothermal annealing can be used to produce various phases such as ferrite, pearlite, bainite, or martensite, depending on the chosen holding temperatures and times. This allows for tailoring the material's hardness, ductility, toughness, and machinability. The rapid cooling to the holding temperature prevents the formation of undesirable microstructures that might occur during slower, continuous cooling. LõõmutamineIsotermiline is often employed when a homogeneous microstructure is required or when specific properties that are difficult to achieve through other annealing methods are desired.