Stratified composite material for sliding elements and method for the production thereof

US6537683B1 · kind B1 · utility

Assignee

• Federal-Mogul Wiesbaden GmbH & Co. KG · DE

Inventors

• Klaus Staschko · Idstein, DE
• Karl-Heinz Gruenthaler · Usingen, DE

Key dates

• Filing date: May 3, 2001
• Grant date: Mar 25, 2003
• Expiry date: May 3, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12882
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method is described for producing composite multilayer materials which exhibit optimum properties throughout their entire service life. The composite multilayer material comprises a backing layer, a bearing metal layer, an intermediate layer and an electrodeposited overlay, which exhibits a hardness which increases continuously from its surface in the direction of the bearing metal layer. The method provides for the electrodeposition as overlay of a lead-free alloy with at least one hard and one soft component, the current density being modified within the range of from 0.3 to 20 A/dm2 during the deposition process and/or the temperature of the electroplating bath being modified within the range of from 15° C. to 80° C.