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BAg25CuZn brazing of stainless steel brazing seam

ternary phase diagram n _] l known, the beginning of the brazing seam metal first precipitated crystalline melting point of copper-rich phase (Figure lb1 spike-like phase), the first Cu-rich crystalline phase, resulting in poverty around the liquid copper, and In the subsequent cooling process of crystallization,Abercrombie Hoodies, a white silver-rich phase (Figure lb2 spike-like white light relative to the external part); temperature is further reduced, due to 3 BAg25CuZn brazing brazing brazing seam of stainless steel cooling rate of 97 so Lq + p three-phase zone expanded. For I,-a】 + S, generating a balance does not appear crystalline eutectic ∞ + port until the liquid disappeared, the crystallization is completed. Method of comparing the two brazing joints brazed we can see, the flame brazing joints due to cooling speed, large undercooling, the crystallization of nuclear many brazing while the central and edge crystals, so evenly distributed,ugg boots italia, small organizations, and because the grain The dendritic growth and segregation between the branches, resulting in copper-rich phase is wheat-like, surrounded by silver-rich phase. Also due to fast cooling, resulting in the formation of copper-rich phase containing silver saturation, while eutectic Cu-rich black phase increases; and furnace brazing, the cooling rate is relatively slow, resulting in crystallization is slow, so coarse microstructure along the crystallization of the base metal core to provide the first phase of crystalline copper-rich massive, silver content close to the equilibrium crystalline phase in a relatively low silver content, so the dark color of corrosion, solder joints after the central crystal, the components segregation resulting in uneven distribution of rich silver components. Flame brazing treatment by homogenizing annealing, due to long diffusion,UGG ブーツ, phase composition close to the equilibrium crystalline phase composition, copper-rich phase had spread to the surrounding saturated silver, silver reduction, corroded darken; welding state of joint crystallization of the resulting imbalance of pseudo-eutectic phase in the white needle too much. Partially dissolved when the homogenization, a small white needle-like phase change smaller. Similarly, furnace brazing by homogenization, but also these changes,oakley brillen, but, because the furnace brazed joint tissue close to the equilibrium crystal structure, so spread the relative impact on smaller joints. 3 Conclusions (1) BAg25CuZn 1Crl8Ni9Ti brazing brazing seam by the copper-rich phase, Ag-rich phase and pseudo-eutectic composition. (2) organize a small flame brazing,tory burch boots, copper-rich phase was spike-like; furnace brazed joint tissue thick, massive copper-rich phase composition distribution was uneven, the central rich silver brazing seam, edge-rich copper. (3) annealing is conducive to the composition of the brazing seam homogenization.