Heat treatment

hardening:

Quenching or quenching is a heat treatment in which steel is heated and then cooled.

over a certain period of time. The 2 phases of heating and cooling of the metal increase the hardness of the metal.

carburetion:

This treatment is used to increase the surface hardness of "soft" and "semi-soft" steel parts,

that's to say. H in non-alloy steel with a carbon content of less than 0.3% (type C22).

This is a thermochemical treatment in which the carbon is superficially embedded in the

into the steel to transform it on the surface into a highly case-hardened steel that can be hardened.

Carburizing refers to two metallurgical processes:

- Steel production process by reaction of iron obtained in the furnace at low temperature with carbon monoxide.

Carbon → carburization of the core.

- Metallurgical process for hardening steels by superficial addition of carbon before quenching. Surface carburization → surface carburization.

Table of hardnesses according to class (NFE 25-100)