A carrier gas is the basic atmosphere in a furnace to which is added the active gases which impart the carbon or nitrogen into the surface of the steel.
Carrier gas is normally neutral with regard to the surface carbon content of the steels being treated, i.e. it neither increases nor decreases the surface carbon content. The active gases which actually carry out the case hardening are called the additions.
A carrier gas is the basic atmosphere in a furnace to which is added the active gases which impart the carbon or nitrogen into the surface of the steel.
Carrier gas is normally neutral with regard to the surface carbon content of the steels being treated, i.e. it neither increases nor decreases the surface carbon content. The active gases which actually carry out the case hardening are called the additions.
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