Abstract
In copper brazing of iron to chromium, cobalt and nickel, the dissolution and deposit of base metal takes place at both base metal-molten filler metal interfaces owing to the narrow joint clearance and the deposited phases of solid solution consisting of both base metals grow at those interfaces with heating time at a constant brazing temperature.In case of chromium, cobalt and nickel, the deposited phases are (α-Fe, Cr), (γ-Fe, α-Co) and γ(γ-Fe, Ni) respectively. This phenomenon should be observed in the dissimilar brazing where both base metals dissolve into the molten filler metal within a few percent and form a solid solution over a wide con-stituent range at a brazing temperature.
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