Internal combustion engine piston provided with composite layer and manufacturing method thereof

• Main Authors: WEI YUNCAI, KONG DEFEN, YAN JUNHENG, YAN LUBIN, QI PENG, SUN GUOCHEN, ZHANG LUJING, JIN FENG
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2012
• Subjects: 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; COLOUR PRINTING; 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; LINING MACHINES; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; STAMPS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TYPEWRITERS; WEAPONS

The invention discloses an internal combustion engine piston provided with a composite layer and a manufacturing method thereof, wherein a basal body is made of an Al-Si alloy; the integral outer surface of the piston is processed through phosphatization and is used as an adhesion bottom layer, then the outer surface of a head part of the piston is processed through ceramic stratification, and the outer surface of a skirt section is processed through graphite stratification. The phosphatization treatment comprises the following procedures: chemical degreasing, cold water washing, phosphatization, cold water washing, distilled water washing and drying; the graphite stratification comprises the following procedures: ultrasonic degreasing, cleaning, hot water washing, cold water washing, drying, constant temperature, coating printing, standing and solidification; and the ceramic stratification comprises the following procedures: chemical degreasing, hot water washing, cold water washing, drying, ceramic plating