Invention Grant
US08960072B2 Multilayer lubrication coating film and internal combustion engine piston using the coating film 有权
多层润滑涂膜和内燃机活塞采用涂膜

Multilayer lubrication coating film and internal combustion engine piston using the coating film
Abstract:
A multilayer lubrication coating film is formed on the outer surface of an object to be coated. The multilayer lubrication coating film comprises a lower-layer coating film formed on an outer surface of the object to be coated, and an upper-layer coating film formed on a surface of the lower-layer coating film. The lower-layer coating film has a higher Vickers hardness than the Vickers hardness of the object to be coated.
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