Hardening; Quenching with or without subsequent tempering

Introduced: September 1968

Last revised: January 2006

Full Title

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening; Quenching with or without subsequent tempering

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: METALLURGY OF IRON
Subclass:: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING

2 direct subcodes

Child Classifications

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C21D 1/19 by interrupted quenching
C21D 1/25 Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")