Multi-layered brazing sheet

US7648776B2 · kind B2 · utility

Assignees

• BEHR GMBH & CO. KG · DE
• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Klaus Vieregge · Nauort, DE
• Sampath Desikan · Koblenz, DE
• Adrianus Jacobus Wittebrood · Velserbroek, NL
• Mark Henrik Röger · Koblenz, DE
• Job Anthonius Van Der Hoeven · Haarlem, NL
• Andreas Eilemann · Erdmannhausen, DE
• Matthias GÖRDELER · Stuttgart, DE
• Matthias Traub · Balingen, DE
• Matthias Türpe · Erbach, DE
• Bernd Grünenwald · Jeffery Road, DE

Key dates

• Filing date: Oct 12, 2006
• Grant date: Jan 19, 2010
• Expiry date: May 19, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12764
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A multi-layered brazing sheet with improved long life corrosion resistance achieved by balancing the Zn, Cu, Mn, Si and Mg content of the core and interliner alloy. The brazing sheet has a core of a 3xxx alloy, an inner braze cladding of a 4xxx alloy, and between core and inner braze cladding an interliner of a 3xxx alloy. The 3xxx alloy of the core has 0.55-1.0 wt % Cu, 0.7-1.8 wt % Mn, <0.3 wt % Mg, <0.4 wt % Zn. The 3xxx alloy of the interliner has <0.25 wt % Cu, 0.5-1.5 wt % Mn, <0.3 wt % Mg, 0.1-5.0 wt % Zn. A 1xxx or 7xxx alloy could be used for the interliner instead of the 3xxx alloy.