Definition - What does Normalizing mean?

Normalizing refers to a heat treatment process that is used to regulate internal material stress. This leads to better regulation of the rate of corrosion that may be experienced by a metal surface.

Corrosionpedia explains Normalizing

Normalizing regulation allows for refining of a material's grain size and improves its mechanical properties. Normalizing is done to give steel a uniform and fine-grained structure. The generation of uniformity in the chemical and physical properties of an alloy is most paramount after it has been casted, forged, hot rolled or cold rolled. This is due to the wider degree of deformation that is possible in the metal after such manipulation.

Normalizing involves heating a metal to a temperature that is roughly equivalent to its hardening temperature. This initiates the formation of austenitic grain boundaries. The material is then cooled, forming ferritic grains. Ultimately, ferritic grains are the most fine-textured structure with predictable physical, corrosion and machinability responses.

During this process, metal stress must be controlled as it leads to metal failure. Low-carbon steels do not usually require normalizing. Normalizing also increases the strength and hardness steel.

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