Steel for bearings

US6162390A · kind A · utility

Assignees

• Ascometal · FR
• SNR Roulements · FR
• Valti Societe Anonyme pour la Fabrication de Tubes Roulements · FR

Inventors

• Jacques Bellus · Montigny-lès-Metz, FR
• Gilles Baudry · Metz, FR
• Gilles Dudragne · Rumilly, FR
• Daniel Girodin · Rumilly, FR
• Gérard Jacob · Avallon, FR
• Alain Vincent · Saint-Estève, FR
• Gérard Lormand · Villeurbanne, FR

Key dates

• Filing date: Apr 6, 1998
• Grant date: Dec 19, 2000
• Expiry date: Apr 6, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S384/912
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%.ltoreq.C.ltoreq.1.5%; 0.4%.ltoreq.Mn.ltoreq.1.5%; 0.75%.ltoreq.Si.ltoreq.2.5%; 0.2%.ltoreq.Cr.ltoreq.2%; 0%.ltoreq.Ni.ltoreq.0.5%; 0%.ltoreq.Mo.ltoreq.0.2%; 0%<Al.ltoreq.0.05%; S.ltoreq.0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn.ltoreq.0.75+0.55.times.Si and Mn.ltoreq.2.5-0.8.times.Si. Process for the manufacture of a bearing component.