Knowra Heat treating Heat treating Heat treating is the controlled heating and cooling of a material to change its microstructure and properties, such as hardness, strength, or ductility.
Phase diagram : A chart showing which phases of a material are stable at different temperatures, pressures, or compositions. Phase boundaries help determine temperatures for heating and transformation.
Annealing : A heat treatment that softens a material or improves its structure through heating and controlled cooling. Annealing reduces hardness and residual stress while improving workability.
Microstructure : The arrangement of phases, grains, defects, and other features within a material. Heat treating changes this internal structure to alter bulk properties.
Cold working : Plastic deformation performed below a material’s recrystallization temperature, usually increasing strength and hardness. Unlike heat treating, it changes properties primarily through deformation.
Austenite : A face-centered cubic phase of iron that can dissolve much more carbon than ferrite. Many steel treatments first heat the material until austenite forms.
Tempering : A treatment that reheats hardened steel below its transformation temperature to reduce brittleness and adjust hardness. It trades some as-quenched hardness for greater toughness.
Steel : An iron-based alloy containing carbon, often with additional alloying elements. Its carbon content and alloying determine which heat treatments are possible.
Hot working : Plastic deformation performed above a material’s recrystallization temperature. It combines shaping with structural changes rather than relying on a separate thermal cycle.
Martensite : A hard, metastable phase formed when austenite transforms rapidly without long-range diffusion. Rapid quenching can create martensite, producing high hardness and brittleness.
Case hardening : A treatment that hardens a component’s surface while retaining a tougher, more ductile interior. Gears and similar parts need wear-resistant surfaces without brittle cores.
Show all 22 Linked from 22 pages Materials science Related : Thermal cycles can change phases, grain size, and defect populations.
Fumigation Compared with : Heat can treat enclosed spaces or commodities without introducing a toxic gas.
Metallurgy Related : Thermal cycles adjust hardness, strength, and ductility after shaping.
Alloy Related : Thermal cycles change phases, precipitates, and grain structure in many alloys.
Chytridiomycosis Related : Some amphibians and chytrid strains respond to temperatures that suppress fungal growth.
Cast iron Related : Annealing and other treatments alter cast iron’s matrix, hardness, and machinability.
Kiln Related : It shares kiln-like thermal control, though it commonly targets metals rather than ceramic bodies.
Metalworking Related : Thermal cycles can harden, soften, or toughen metal after shaping.
Show all 22