Use of helium/nitrogen gas mixtures in up to 8kW laser welding

US6770841B2 · kind B2 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Francis Briand · Paris, FR
• Karim Chouf · Montmorency, FR
• Philippe Lefebvre · Boulogne-sur-Mer, FR
• Eric Verna · Osny, FR

Key dates

• Filing date: Jun 9, 2003
• Grant date: Aug 3, 2004
• Expiry date: Jul 10, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/50
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Binary gas mixture for welding using a laser beam of up to 8 kW, consisting of 60% to 80% nitrogen by volume, the remainder (up to 100%) being helium. Application of this gas mixture to the welding of steel, stainless steel or titanium.