Corrosion resistant vacuum brazing sheet

Details Corrosion resistant vacuum brazing sheet Corrosion resistant vacuum brazing sheet

B - Operations, Transporting

32

B

148/30.5

B32B 15/20 (2006.01) B23K 35/28 (2006.01)

Patent

CA 1238840

CORROSION RESISTANT VACUUM BRAZING SHEET ABSTRACT OF THE DISCLOSURE A novel process for producing aluminum compo- site sheet products for roll forming and vacuum brazing is disclosed, which provides an unexpected improvement in the corrosion resistance of the brazed product. According to the process, a composite sheet is annealed to a strain-free state after having been rolled to a thickness which is a critical amount greater than the thickness ultimately sought. Following the annealing step, the sheet is cold worked to the desired thickness, the degree of reduction in this final step being within a critical range which provides the improvement in cor- rosion resistance to the final product after vacuum brazing.

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