Cast iron components

Details Cast iron components Cast iron components

C - Chemistry, Metallurgy

21

D

C21D 5/00 (2006.01) B22D 15/00 (2006.01)

Patent

CA 2308024

A cast iron component, e.g. a camshaft, has a wear-resistant layer formed on at least one surface portion thereof, said layer being rich in primary carbides. The cast iron surrounding the carbides and in the remainder of the component has a structure which is substantially ausferritic. A method of manufacturing a component is also claimed.

L'invention concerne une pièce en fonte, par exemple un arbre à cames, qui présente une couche résistante à l'usure formée sur au moins une partie de sa surface, ladite couche étant riche en carbures primaires. La fonte entourant les carbures et se trouvant dans le reste de la pièce présente une structure qui est sensiblement ferrite bainitique/austénite à haute teneur en carbone. Fait aussi l'objet de cette invention un procédé de fabrication de cette pièce.

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