Combustion engine piston with composite layer and manufacturing method thereof

The invention discloses a combustion engine piston with a composite layer. The substrate of the combustion engine piston is made of Al-Si alloy, the outside surface of the head part of the piston has an Al2O3 oxide film layer, and the outside surface of the skirt part of the piston has a tin plating...

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Bibliographische Detailangaben
Hauptverfasser:	WEI YUNCAI, KONG DEFEN, ZHEN JIESHENG, YAN JUNHENG, KONG LINGDONG, ZHANG LUJING, ZHANG SHUMIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS THEREFOR ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBUSTION ENGINES CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MECHANICAL ENGINEERING METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	The invention discloses a combustion engine piston with a composite layer. The substrate of the combustion engine piston is made of Al-Si alloy, the outside surface of the head part of the piston has an Al2O3 oxide film layer, and the outside surface of the skirt part of the piston has a tin plating. The manufacturing method is to anodize the heat part of the piston and plate tin on the skirt part of the piston. The anodizing process flow is as follows: chemical oil removal, washing with hot water, washing with cold water, polishing, washing with cold water, local piston protection by a tool, oxidization and washing with cold water. The skirt part tin plating process comprises: performing the before-plating treatment of the piston with the oxidized head part; protecting the piston head, an annular groove and the like, which are not to be plated with tin; placing the piston in chemical plating solution at a certain temperature and keeping for 2 to 3 minutes; and washing with cold water, passivating, washing wi