Aluminium alloy pipe wrench "teeth" generally adopts low carbon high alloy steel, this part also should undertake heat treatment.

Heat treatment is to point to the material under solid state, by means of heating, heat preservation and cooling, to get the expected organization and properties of a metal hot working process. Aluminium alloy pipe wrench "teeth" when use to and hard wear-resisting, after processed into tooth to be carburizing or nitriding chemical heat treatment, according to different material carburizing temperature at 900 degrees, and then quenching, quenching medium is oil, aims to improve the hardenability.

Finally in the tempering, tempering in order to remove the tooth stress and thermal stress hardening of the organization.