IPC Main Group
C21D 1/00 General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
Introduced: September 1968
Last revised: January 2006
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
Related Keywords
ANNEALING of ironANNEALING of metals or alloys in generalDECARBURISING metals and alloys in general by diffusionHARDENING of iron or steelHARDENING of metals or alloys in generalHEAT TREATMENT of iron or steelHEAT TREATMENT of metals and alloys in generalannealing of IRONhardening of IRONheat treatment of IRONtempering of IRONannealing, decarburising, hardening or tempering of METAL(S)heat-treatment of iron or steelgeneral methods of or devices for heat treatment of NON-FERROUS metals or alloysTEMPERING of iron or steelTEMPERING of metals or alloys in general
15 direct subcodes
Child Classifications
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- C21D 1/02 Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
- C21D 1/04 with simultaneous application of supersonic waves, magnetic or electric fields
- C21D 1/06 Surface hardening
- C21D 1/18 Hardening; Quenching with or without subsequent tempering
- C21D 1/26 Methods of annealing
- C21D 1/34 Methods of heating
- C21D 1/54 Determining when the hardening temperature has been reached by measurement of magnetic or electrical properties
- C21D 1/55 Hardenability tests, e.g. end-quench tests
- C21D 1/56 characterised by the quenching agents
- C21D 1/62 Quenching devices
- C21D 1/68 Temporary coatings or embedding materials applied before or during heat treatment
- C21D 1/74 Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D 1/78 Combined heat-treatments not provided for above
- C21D 1/82 Descaling by thermal stresses
- C21D 1/84 Controlled slow cooling