Brazing material

B - Operations – Transporting – 22 – F

Patent

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Details

B22F 7/04 (2006.01) B22D 19/04 (2006.01)

Patent

CA 2688325

A brazing material comprising a substrate metal and a second metal, e.g., an aluminum alloy and zinc alloy, is disclosed. The zinc alloy serves as a temperature depressant to reduce the resulting liquidus point of the resulting mixture substantially below 540° C such that the resulting alloy may be used in applications where the base metals to be joined require a filler metal with a lower liquidus point. The brazing material may further include a flux, e.g., as a core or coating. The flux shall have an active temperature substantially lower than that of the liquidus point of the brazing material. The brazing material may be delivered in a variety of different forms such as strips, rings, washers, rods, wires, and other such preforms.

L'invention concerne un matériau de brasage qui comporte un métal de substrat et un second métal, par exemple un alliage d'aluminium et un alliage de zinc. L'alliage de zinc sert de dépresseur de température pour réduire le point de liquidus résultant du mélange résultant sensiblement sous 540 °C de sorte que l'alliage résultant peut être utilisé dans des applications où les métaux de base à souder nécessitent un métal de charge avec un point de liquidus inférieur. Le matériau de brasage peut en outre comprendre un fondant, par exemple comme noyau ou revêtement. Le fondant doit avoir une température active sensiblement inférieure à celle du point de liquidus du matériau de brasage. Le matériau de brasage peut être distribué sous une variété de formes différentes telles que des bandes, des bagues, des rondelles, des tiges, des fils et d'autres telles préformes.

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