A study on the interfacial activity behavior of flux during aluminium brazing has been made by using metallography,SEM and electron prob techniques.The results show that the activity, of a flux is caused by the wettin...A study on the interfacial activity behavior of flux during aluminium brazing has been made by using metallography,SEM and electron prob techniques.The results show that the activity, of a flux is caused by the wetting of base metal with the liquid heavy metal reduced from the flux,thus,some regions of liquid alloy created,at which no aluminium oxide film covers on the surfaces.The reduced metal drops are finally trapped in the fillet.The size of the metal drops increases with the decrease of brazing temperature.展开更多
The mechanism of activity of a flux-during aluminium brazing has been discussed. A model electrolysis experiment by Hg drop in Cu(NO3)2 0. 01M water solution was carried out for simulating the fused filler metal in mo...The mechanism of activity of a flux-during aluminium brazing has been discussed. A model electrolysis experiment by Hg drop in Cu(NO3)2 0. 01M water solution was carried out for simulating the fused filler metal in molten flux. The results deduce that the higher precipitation rate of heavy metal ions on Al base, the higher activity will have. The details of molten precipitates Zn and Cd on Al base have been shown photographically as well.展开更多
文摘A study on the interfacial activity behavior of flux during aluminium brazing has been made by using metallography,SEM and electron prob techniques.The results show that the activity, of a flux is caused by the wetting of base metal with the liquid heavy metal reduced from the flux,thus,some regions of liquid alloy created,at which no aluminium oxide film covers on the surfaces.The reduced metal drops are finally trapped in the fillet.The size of the metal drops increases with the decrease of brazing temperature.
文摘The mechanism of activity of a flux-during aluminium brazing has been discussed. A model electrolysis experiment by Hg drop in Cu(NO3)2 0. 01M water solution was carried out for simulating the fused filler metal in molten flux. The results deduce that the higher precipitation rate of heavy metal ions on Al base, the higher activity will have. The details of molten precipitates Zn and Cd on Al base have been shown photographically as well.
