| 摘要 |
An aluminum filler alloy, particularly useful in fluxless controlled atmosphere brazing (CAB), contains from about 4% to 20% wt. % silicon (Si) and about 0.0008% to 0.06% sodium (Na). In addition to the sodium, the alloy may also contain bismuth (Bi) and/or potassium (K) in the ranges of about 0.0005% to 0.03% K, and from about 0.03% to 0.133% Bi. The filler metals can be clad to aluminum core alloys preferably from the 3XXX, 5XXX, or 6XXX alloys series.
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