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SPOJENE OCELARNY
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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
C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
C21D1/06—Surface hardening
C21D1/08—Surface hardening with flames
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FR1057701D1951-06-061952-06-05Procédé de trempe autogène d'objets en acier par degrés et dispositif pour la mise en oeuvre de ce procédé
ExpiredFR1057701A
(fr)