公开(公告)号：US20220152750A1

公开(公告)日：2022-05-19

申请号：US17594213

申请日：2019-04-24

Applicant: ARCONIC TECHNOLOGIES LLC

Inventor： Tao ZHOU ,  Stephen F. BAUMANN ,  Baolute REN

IPC: B23K35/02 ,  B32B15/01 ,  B23K35/00 ,  B23K35/28 ,  B23K20/04 ,  C22C21/02

Abstract: An apparatus, material and method for forming a reliably roll-bonded, multi-layer aluminum alloy brazing sheet has a core of 2XXX, 3XXX, 5XXX or 6XXX alloy, a braze liner of 4XXX alloy and an interliner with Mn in the range of 0.2 to 1.0 wt. % and Si in the range of 0.31-1.0 wt. %. Alternatively, Mg in the range of 0.1 to 0.5 wt. % may be present in the interliner. Additional layers such as a second braze liner may be present for providing an inner surface of a heat exchanger. An additional interliner may optionally be used between the core the inner surface layer. The material may be used for highly corrosive environments like an EGR cooler.

公开(公告)号：US20220281039A1

公开(公告)日：2022-09-08

申请号：US17597846

申请日：2020-09-28

Applicant: ARCONIC TECHNOLOGIES LLC

Inventor： Andreas KULOVITS ,  Tao ZHOU ,  Baolute REN ,  Harry R. ZONKER

IPC: B23K35/28 ,  C22C21/08 ,  B23K35/02 ,  B32B15/01

Abstract: New aluminum alloy brazing sheets are disclosed. The new aluminum alloy brazing sheets may include a core, an interliner layer adjacent the core, and a braze liner adjacent the interliner layer. The interliner layer may include a first aluminum alloy having at least 0.35 wt. % Si and from 0.05 to 2.0 wt. % Mg. The braze liner may include a second aluminum alloy having 0.05 to 2.0 wt. % Mg. The first aluminum alloy and the second aluminum alloy may include an amount of magnesium sufficient to achieve Tsolidus(IL)≥5° C. Tliquidus(BL). The new aluminum alloy brazing products may be useful, for instance, in fluxfree brazing.