Low-pressure carburising method

Details Low-pressure carburising method Low-pressure carburising method

C - Chemistry, Metallurgy

23

C

C23C 8/22 (2006.01)

Patent

CA 2407372

The invention relates to a low-pressure carburising method comprising alternating low-pressure enrichment steps and diffusion steps in the presence of a neutral gas. During the enrichment steps, an enriching gas and neutral gas mixture is used, the proportion of the neutral gas being between 5 and 50 % by volume of the enriching gas. The enriching gas can be, for example, acetylene (C2H2).

L'invention concerne un procédé de cémentation basse pression consistant à utiliser une alternance d'étapes d'enrichissement à faible pression et d'étapes de diffusion enprésence d'un gaz neutre dans lequel, pendant les étapes d'enrichissement, on utilise un mélange de gaz d'enrichissement et de gaz neutre, le gaz neutre étant dans une proportion de 5 à 50 % en volume du gaz d'enrichissement. Le gaz d'enrichissement est par exemple de l'acétylène (C¿2?H¿2?).

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