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US 7,401,724 B2Granted
Brazing flux for dry application
AssigneeSolvay Fluor und Derivate GmbH
InventorsHans-Walter Swidersky, Alfred Ottmann, Heinz-Joachim Belt
Life of this patent
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Abstract
A flux based on alkali fluoroaluminate is described which is highly suitable for dry application (“dry fluxing”). This is a flux which is free of fine-grained fraction, which is defined by a range of grain-size distribution.
Claims4
A process for joining components of aluminum or aluminum alloy, said process comprising
- applying a flux to the components to be joined, wherein said flux is applied dry and electrostatically charged, and
- thereafter heating the components to braze them together, wherein the flux particles have the following cumulative particle volume distribution:
- % (lower
- % (upper
- x (micron)
- limit)
- limit)
- 0.45
- 0.25
- 3.00
- 0.55
- 1.40
- 4.00
- 0.65
- 2.00
- 5.30
- 0.75
- 2.70
- 6.80
- 0.90
- 3.80
- 8.80
- 1.10
- 5.00
- 12.20
- 1.30
- 5.80
- 15.80
- 1.55
- 7.00
- 20.00
- 1.85
- 8.50
- 25.00
- 2.15
- 10.00
- 29.00
- 2.50
- 11.50
- 32.50
- 3.00
- 14.00
- 41.00
- 3.75
- 17.00
- 53.00
- 4.50
- 16.00
- 63.00
- 5.25
- 19.00
- 71.00
- 6.25
- 23.00
- 79.00
- 7.50
- 28.00
- 86.00
- 9.00
- 33.00
- 90.00
- 10.50
- 38.00
- 94.00
- 12.50
- 40.00
- 96.00
- 15.00
- 42.00
- 98.00
- 18.00
- 44.00
- 98.70
- 21.50
- 48.00
- 99.50
- 25.50
- 54.00
- 100.00
- 30.50
- 65.00
- 100.00
- 36.50
- 77.50
- 100.00
- 43.50
- 89.00
- 100.00
- 51.50
- 93.00
- 100.00
- 61.50
- 94.00
- 100.00
- 73.50
- 95.80
- 100.00
- 87.50
- 96.00
- 100.00.
97 more elements
A process for joining components of aluminum or aluminum alloy, said process comprising
- applying a flux to the components to be joined, wherein said flux is applied dry and electrostatically charged, and
- thereafter heating the components to braze them together, wherein the flux particles have the following cumulative particle volume distribution:
- % (lower
- % (upper
- x (micron)
- limit)
- limit)
- 0.45
- 0.94
- 2.28
- 0.55
- 1.53
- 3.49
- 0.65
- 2.19
- 4.73
- 0.75
- 2.91
- 6.00
- 0.90
- 3.91
- 8.07
- 1.10
- 4.97
- 11.69
- 1.30
- 5.89
- 15.30
- 1.55
- 7.03
- 19.58
- 1.85
- 8.43
- 24.20
- 2.15
- 9.91
- 28.19
- 2.50
- 11.76
- 32.18
- 3.00
- 14.58
- 37.01
- 3.75
- 18.94
- 43.07
- 4.50
- 22.24
- 48.09
- 5.25
- 25.31
- 52.30
- 6.25
- 29.74
- 57.13
- 7.50
- 34.30
- 64.82
- 9.00
- 37.26
- 72.07
- 10.50
- 38.78
- 77.06
- 12.50
- 40.25
- 81.89
- 15.00
- 41.87
- 86.27
- 18.00
- 44.20
- 91.28
- 21.50
- 48.13
- 95.12
- 25.50
- 54.67
- 97.45
- 30.50
- 65.04
- 98.91
- 36.50
- 77.82
- 99.70
- 43.50
- 89.38
- 100.00
- 51.50
- 96.55
- 100.00
- 61.50
- 98.64
- 100.00
- 73.50
- 100.00
- 100.00
- 87.50
- 100.00
- 100.00.
97 more elements
Dependencies are inferred from the claim text.