• Title/Summary/Keyword: 노블 브레이징

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A Study of Eutectic Bonding for Aluminium using Novel Brazing Process (Novel Brazing법에 의한 Al의 공정접합에 관한 연구)

  • 정병호;김무길;이성열
    • Journal of Advanced Marine Engineering and Technology
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    • v.24 no.1
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    • pp.59-66
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    • 2000
  • To investigate the optimum brazing condition, variation of bonded structure and mechanical properties of novel brazed pure Al with bonding condition (brazing temperature, time and Si/flux ratio) was studied. A basic study of the bonding mechanism was also examined. The optimum brazing condition was obtained at $590^{\circ}$ for 2 minutes and the bonded structure showed that it is composed of almost entirely eutectic Al-Si with near eutectic composition. At higher brazing temperature $630^{\circ}$, hypoeutectic Al-Si structure was observed in the bonded area and resulted in erosion of base metal. The thickness of eutectic layer formed in optimum brazing temperature increased linearly with the square root of time, showing a general diffusion controlled process. The ultimate tensile strength of bonded joint brazed at an optimum brazing condition was about 60% of base metal and its fracture surface showed a brittle mode.

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