New fluxing agents

Details New fluxing agents New fluxing agents

B - Operations, Transporting

23

K

B23K 35/363 (2006.01) B23K 35/36 (2006.01)

Patent

CA 2325455

According to the invention components made of aluminium and aluminium alloys can be welded at temperatures of up to 600 ~C using a fluxing agent on the basis of alkali fluorozincate or alkali fluoride/zinc fluoride mixtures. Other fluxing agents, for example on the basis of potassium fluoroaluminate can be used in addition. Alkali fluorozincate fluxing agents, especially potassium and cesium fluorozincate fluxing agents, act not only as a fluxing agent but also improve the surface quality since zinc and alkali fluoroaluminates are deposited on the surface of the components. The invention also relates to new fluxing agents on the basis of alkali metal fluorozincates.

Selon l'invention, des composants en aluminium et en alliages d'aluminium peuvent être soudés au moyen d'un flux à base de fluorozincate alcalin ou de mélanges fluorure alcalin/fluorure de zinc à des températures inférieures ou égales à 600 ·C. D'autres flux, par exemple à base de fluoroaluminate alcalin, peuvent en outre être utilisés. Les flux de fluorozincate alcalin, notamment les flux de fluorozincate de potassium et de césium, ne font pas seulement office de flux, mais améliorent également la qualité de surface, car du zinc et des fluoroaluminates alcalins sont déposés sur la surface des composants. L'invention concerne également de nouveaux flux à base de fluorozincates de métaux alcalins.

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