Annealing steel is a heat treatment process that softens the material, improves ductility, relieves internal stresses, and enhances overall workability by heating it to a specific temperature and then slowly cooling it.

Solution annealing steel is a heat treatment process that dissolves carbide precipitates, enhances corrosion resistance, and increases material uniformity by heating to a high temperature and rapidly cooling it.

Age hardening steel, also known as precipitation hardening, is a heat treatment process that increases strength and hardness through the formation of stable precipitates during aging at controlled temperatures.

Atmosphere heat treatment of steel involves heating the material in a controlled gaseous environment to prevent oxidation, enabling precise alterations in microstructure, enhancing mechanical properties, and achieving desired performance characteristics.

Carburizing steel is a surface hardening process that involves diffusing carbon into the steel's surface at high temperatures, enhancing its hardness and wear resistance while maintaining a tough core.