Process for repairing a cylinder running surface by means of plasma spraying processes

US8877285B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Mark Silk · Pulheim, DE
• Leander Schramm · Heilsberg, DE
• Wolfgang Puetz · Rostock, DE
• Clemens Maria Verpoort · Monheim, DE

Key dates

• Filing date: Nov 20, 2012
• Grant date: Nov 4, 2014
• Expiry date: Nov 20, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C4/18
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method of repairing an inner surface of a cylinder liner housed in an engine block. Material is removed from the inner surface to produce a reduced-thickness region, the reduced-thickness region extending axially relative to the cylinder and stopping short of an end of the liner to leave a region of original diameter between the reduced thickness region and the end of the liner. The surface the reduced-thickness region is then roughened, for example by hammer brushing. A plasma coating is applied to the reduced-thickness region and to at least a portion of the region of original diameter. The coating is then finish-machined to produce a uniform internal diameter equal to an original internal diameter of the region of original diameter prior to the application of the coating.