Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Introduced: September 1968

Last revised: January 2006

Full Title

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

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

3 direct subcodes

Child Classifications

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C21D 1/76 Adjusting the composition of the atmosphere
C21D 1/767 with forced gas circulation; Reheating thereof
C21D 1/773 under reduced pressure or vacuum