hehkutusprosessit
Hehkutusprosessit, or annealing processes, are heat treatments applied to materials, primarily metals and glass, to alter their physical and mechanical properties. The fundamental principle involves heating the material to a specific temperature, holding it there for a predetermined duration, and then cooling it slowly. This controlled heating and cooling cycle is designed to relieve internal stresses, increase ductility, reduce hardness, and improve machinability or formability.
In metallurgy, annealing is commonly used to soften cold-worked metals, making them easier to shape or work.
For glass, annealing is crucial for preventing fracture. When glass cools too rapidly, internal stresses develop