Method for improving frictional surface in cylinders or sleeves of internal combustion engines
AssigneeAplicaciones Industriales de Cromo Duro, S.A.
InventorJuan Retolaza Ibarguengoitia
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Abstract
Method of preparing chromium plated surfaces of improved anti-friction property, by machining the base material to a smooth finish, chromium plating the machined surface of the base material, heating the chromium plated surface at 150.degree.-325.degree. C for 1-3 hours, cooling and honing the surface, and lapping the surface with an abrasive to a surface finish such that the roughness of the surface measures 25-50 micro-inches center line average.
Claims10
A method for preparing a chromium plated surface which comprises machining a metal base material to a smooth finish of up to 10 micro-inches CLA, chromium plating the machined surface, heat treating the chromium plated surface at a temperature between 150.degree. and 325.degree. C for 1 to 3 hours, cooling the heated surface in air, honing the cooled surface to remove irregularities from said surface, and lapping or blasting the honed surface with abrasive grit to obtain a surface finish between 25 and 50 micro-inches CLA.
Dependencies are inferred from the claim text.