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US 11,685,973 B2Granted
Corrosion resistant high strength brazing sheet
AssigneeArconic Technologies LLC
InventorBaolute Ren
Life of this patent
Estimating the term…
Abstract
An apparatus, material and method for forming a brazing sheet has a high strength core bonded with corrosion protection layer on the coolant side and/or layers on both airside and coolant side. The material enables heat exchanger components, such as tube, header, plate, etc., for applications, such as automotive heat exchangers, that require high fatigue life as well as high service life in a corrosive environment.
Claims19
A sheet material comprising:
- an aluminum alloy core consisting of 0.1 to 1.2 wt % Si, up to 0.6 wt % Fe, 1.53 to 2.6 wt % Cu, 0.5 to 1.8 wt % Mn, up to 0.6 wt % Mg, 0.05 to 1.0 wt % Zn, up to 0.2 wt % Ti, up to 0.2 wt % Zr, Al, and impurities;
- a 4XXX aluminum alloy braze liner comprising 6 to 13 wt % Si, up to 0.8 wt % Fe, up to 0.3 wt % Cu, up to 0.2 wt % Mn, up to 2.0 wt % Mg, and up to 4.0 wt % Zn;
- and
- a waterside liner comprising 0.1 to 1.2 wt % Si, up to 1.0 wt % Fe, up to 0.3 wt % Cu, up to 1.5 wt % Mn, up to 0.6 wt % Mg, 0.5 to 12 wt % Zn, up to 0.16 wt % Ti, and up to 0.16 wt % Zr.
1 more element
Dependencies are inferred from the claim text.