Vacuum (low pressure) carburizing is an alternative technology to traditional gas (atmospheric) carburizing. Thus, it is a thermo-chemical treatment consisting of heating steel parts to temperatures usually in the range of 900-1000°C and heating them to a carburizing atmosphere. The purpose of carburizing is to enrich the surface layer with carbon and, consequently, increase its hardness and abrasion resistance while maintaining malleable core. Immediately after carburizing, hardening and tempering are most often performed, however, unlike traditional carburizing, it has a number of advantages resulting from both the used carrier gases – carburizing (C2H2 – acetylene), and the environment in which it is carried out – a vacuum furnace. Environmentally friendly – no CO2 emissions.