Composite multilayer bearing material

US6194087A · kind A · utility

Assignee

• Clyco-Metall-Werke Glyco B.V. & Co. KG · DE

Inventors

• Hans-Ulrich Huhn · Schlangenbad, DE
• Dietmar Wiebach · Wiesbaden, DE
• Karl-Heinz Gruenthaler · Usingen, DE
• Peter Spahn · Darmstadt, DE

Key dates

• Filing date: Dec 11, 1998
• Grant date: Feb 27, 2001
• Expiry date: Dec 11, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1275
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A composite material for plain bearings comprises a backing layer, a bearing metal layer consisting of a copper alloy with a copper content of from 50 to 95 wt. % or an aluminum alloy with an aluminum content of from 60 to 95 wt. %, a diffusion barrier layer and an overlay, applied by electroplating, consisting of a lead-free, tin and copper-containing alloy. The invention provides a composite multilayer material whose overlay, applied by electroplating, does not exhibit any embrittlement even at relatively high temperatures, irrespective of the copper content. The overlay preferably comprises from 8 to 30 wt. % copper, 60 to 97 wt. % tin and 0.5-19 wt. % cobalt.