Patent classifications
C
CHEMISTRY; METALLURGY
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C21
METALLURGY OF IRON
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C21D
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
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1/00
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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C21D1/18
Hardening; Quenching with or without subsequent tempering
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C21D1/19
by interrupted quenching
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C21D1/20
Isothermal quenching, e.g. bainitic hardening
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