| 摘要 |
PURPOSE:To prevent the exfoliation of a ceramic layer by closing the gas holes through the shot peening by the metallization of a corrosion resistive metal layer onto the upper surface of a piston and metallizing a ceramic layer onto the upper surface, in the manufacture of the piston which has the ceramic layer on the upper surface. CONSTITUTION:In the manufacture of a piston 1, the piston (basic material) is cleaned and degreased through the cleaning by perclene, etc., and the upper surface 1a of the piston is roughly polished by applying shot blasting by jetting the fused alumina, etc. as blasting agent from a blasting nozzle 2. Then, a metal layer 3 is formed onto the upper surface 1a of the piston through the metallization with the metal which possesses the corrosion resistance for the fuel gas product, and the upper surface 3a of the metal layer 3 is plastic-worked through the shot peening by using glass beads, etc. as peening agent, and the gas holes on the upper surface 3a of the metal layer are closed. Then, a ceramic layer 4 is formed onto the upper surface 3a of the metal layer by the metallization with ceramics. |
