| Budget Amount *help |
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
The standard brazing process of aluminium alloys require use of non-corrosive fluxes to remove oxides from the base material and to prevent oxidation during the heating process. However it is difficult to used the Flux when brazing aluminum alloys containg a certain amount of Mg. Furthermore, residual flux even after brazing followed by cleaning may cause defects in the final product. In order to develop flux-free brazing of aluminum alloys, it was investigated the influences of sample composition and oxygen partial pressure of atmospheric gas on the brazability of allminum alloys. As a result, it was confirmed that the addition of Mg into the sample improves flux-free brazability of aluminum alloy. Furthermore, when oxygen partial pressure of atmospheric gas was down to ultra low value of 1e-30 atm, very good brazability was obtained comparable with that by flux brazing. It was indicated that surface tension of molten filler alloys influences on the shape of brazing fillets.
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