Verfahren zur Herstellung einer Geschichteten Folienstruktur und Kolben für einen Verbrennungsmotor

Details

Veröffentlichungs-Nr.

EP3978655

Aktenzeichen

EP21200000

Anmeldetag

29. September 2021

Veröffentlichung

8. Juni 2022

Rechtsraum

EP

IPC

C25D11/02C25D11/30C25D11/04

Abstract

[Problem to be Solved] To provide a method for producing a layered film structure wherein a smooth anodized film or chemical conversion film is formed on a surface of an alloy member without being affected by a precipitated phase contained in the alloy member, and a piston for an internal combustion engine. [Solution] The production method of the present invention includes the steps of: forming a pure metal layer on a surface of an alloy member; and conducting an anodizing treatment or a chemical conversion treatment on the pure metal layer to obtain a layered film structure having the alloy member and a film formed on the surface thereof. The piston for an internal combustion engine of the present invention has this layered film structure, wherein an interface between the alloy member and the film is linear at a cross section of the layered film structure or a precipitated phase is present in the interface and the interface is linear at the cross-section of the layered film structure except a portion where the precipitated phase is present.

Anmelder

Firma

Suzuki Motor Corporation

Land

🇯🇵 Japan

Fachgebiete