C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 11/16 (2006.01) B24C 1/10 (2006.01)
Patent
CA 2592523
A method for manufacturing a surface-treated light alloy member is provided. The method involves a shot peening treatment step wherein an air stream containing particles having an average particle size of not less than 10 µm and not more than 200 µm is blown onto the surface of a light alloy member at a spray pressure of not less than 0.2 MPa and not more than 1 MPa, followed by an anodizing treatment wherein the surface of the light alloy member is subjected to an anodizing treatment. The method of the present invention results in a surface-treated light alloy member having favorable fatigue strength and favorable corrosion resistance. The surface- treated light alloy members manufactured by the present method can be used, inter alia, as structural members in transportation machinery including aircraft.
L~invention concerne un élément allié léger traité en surface d~une résistance adéquate à la fatigue et d~une bonne résistance à la corrosion. Elle divulgue également un procédé de fabrication d~un tel élément allié léger traité en surface. Spécifiquement, on pulvérise un courant d~air contenant des particules d~une taille particulaire moyenne supérieure ou égale à 10 µm et ne dépassant pas 200 µm sur la surface d~un élément allié léger à une pression de pulvérisation supérieure ou égale à 0,2 MPa et ne dépassant pas 1 MPa, avant de soumettre la surface de l~élément allié léger à une anodisation.
Mitsubishi Heavy Industries Ltd.
Osler Hoskin & Harcourt Llp
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