Process for the MIG welding of aluminum and its alloys with a shielding gas of the Ar/He/O2 type

US6586700B2 · 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

• Jean-Marie Fortain · Osny, FR
• Philippe Lefebvre · Boulogne-sur-Mer, FR
• Jean-Yves Mouton · Cergy, FR
• Gerard Plottier · Pierrefitte, FR

Key dates

• Filing date: Jun 22, 2001
• Grant date: Jul 1, 2003
• Expiry date: Jun 22, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K9/164
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

For MIG welding, either in a spray mode without current modulation or in a pulsed mode, of aluminum and aluminum alloys, with the use of a gas shield for at least part of the welding zone, the gas shield is a gas mixture consisting, by volume, of from 0.01% to 1.80% oxygen and from 15% to 98.2% helium, and any balance being argon.