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Firma Paul Ferd Peddinghaus
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Firma Paul Ferd Peddinghaus
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Application filed by Firma Paul Ferd Peddinghaus filedCriticalFirma Paul Ferd Peddinghaus
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Publication of FR791773ApublicationCriticalpatent/FR791773A/fr
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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FR791773D1934-06-301935-06-27Procédé pour tremper la surface de pièces métalliques
ExpiredFR791773A
(fr)