Wear-resistance edge layer structure for titanium or its alloys which can be subjected to a high mechanical load and has a low coefficient of friction, and method of producing the same

US6231956A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Berndt Brenner · Heidenau, DE
• Steffen Bonss · Zella-Mehlis, DE
• Hans-Joachim Scheibe · Dresden, DE
• Holger Ziegele · Lorch, DE

Key dates

• Filing date: Jun 14, 1999
• Grant date: May 15, 2001
• Expiry date: Jun 14, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31678
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Wear-resistant edge layer for titanium and its alloys which can be subjected to high loads and has a low coefficient of friction. The wear-resistant edge layer includes a hard amorphous carbon layer, an intermediate layer, and a laser gas alloyed layer. The wear-resistant edge layer may include a 200 to 400 nm thick hard amorphous carbon layer, a 50 to 200 nm thick intermediate layer, and a 0.3 to 2.0 mm thick laser gas alloyed layer. The laser gas alloyed layer may include precipitated titanium nitride needles and have a hardness between 600 HV0.1 and 1400 HV0.1. Process for producing a wear resistant edge layer on a substrate. The process includes forming a laser gas alloyed layer by melting a surface of a substrate, applying an intermediate layer by Laser-Arc, and depositing a hard amorphous carbon layer on the intermediate layer by Laser-Arc.