How does heat treatment affect steel?

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steel: Easy to machine; Since it has low hardness, it can be used for precision engineering purposes.
steel: Difficult to machine, especially after hardening or heat treating.
application

steel: Used in aviation, bicycles, pressure vessels, and automotive structures due to its strength and ductility.
steel: Used in highly durable gears, crankshafts, and tools where greater hardness and strength are required.
Price

steel: More economical due to low percentage of alloying and processing requirements.
steel: More expensive due to the high alloy content and therefore better mechanical properties.

Annealing methods for steel
Annealing heat treatment can improve machinability, reduce benin telegram data internal stress, and increase machinability to steel. These are the annealing methods for steel.

Full annealing

Heat the steel core evenly to temperatures between °C and °C, maintaining the surface between °C and °C. This stage of the annealing process allows the steel to soften to a minimum level of ductility. After this procedure, the steel is gradually cooled to a temperature below °C. This step removes all internal stresses in the core and gives the core surface the highest machinability class.
Subcritical annealing

Higher temperature ranges from °C to °C remove internal stress around the material, resulting in increased stress after work. Unlike full annealing, subcritical annealing does not change the deformation phase temperature, but is very effective in reducing stress around the machined area. For this reason, it is often referred to as process annealing.
Spheroidal annealing

This allows the steel core to be heated to temperatures of °C and °C for a longer period of time to increase ductility. The method creates soft carbide spheres within a hard ferrite matrix around the core to improve machinability without damaging alternative parts.