Process for fabricating cast iron parts

B - Operations – Transporting – 22 – C

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B22C 13/08 (2006.01) B22D 1/00 (2006.01) C21C 1/08 (2006.01) C21C 1/10 (2006.01)

Patent

CA 1135475

ABREGE DESCRIPTIF L'invention concerne un procédé d'élaboration de pièces en fonte. Selon l'invention, on coule le métal en fu- sion dans un moule après avoir élevé sa teneur en aluminium à au moins 0,1% et préalablement à la coulée, la cavité de moulage a été inertée par déversement d'azote liquide en fond de moule. Grâce à cette façon de faire, on évite à la fois les piqûres d'hydrogène et les crasses d'alumine. Applica- tion essentiellement à la fonte à graphite sphéroidal.

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