• 제목/요약/키워드: Aluminum foundry

검색결과 222건 처리시간 0.027초

알루미늄 주물 위 용탕열을 이용한 N-Al계 금속간화합물의 연소합성 코팅 (Ni-Al Based Intermetallics Coating Through SHS using the Heat of Molten Aluminum)

  • 이한영;조용재
    • 한국주조공학회지
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    • 제31권2호
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    • pp.83-86
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    • 2011
  • Ni-Al based intermetallic compounds of self-propagating high-temperature synthesis (SHS) by the heat of molten aluminum and been coated on the aluminum casting alloy. The effects of the pouring temperature in casting and the thickness of casting substrate on SHS of the coating layer have been investigated. The experimental result showed that the reaction of the coating layer was activated with increasing the pouring temperature in casting and the thickness of casting substrate. However, the aluminum substrate was re-melted by the heat of formation for intermetallic compounds. Then, it was considered that some mechanical or thermal treatments for elemental powder mixtures were required to control the heat of formation for intermetallic compounds in advance.

용융 알루미늄내에서 개재물의 크기분포 및 농도측정에 관한 연구 (A Study on the Measurement of the Concentration and the Size Distribution of Inclusions in the Molten Aluminum)

  • 안정;문광호;이광학
    • 한국주조공학회지
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    • 제14권1호
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    • pp.62-74
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    • 1994
  • The concentration and particle size distribution of non-metallic inclusions which suspended in the molten aluminum at $700^{\circ}C$ were measured by using LiMCA apparatus. The result revealed that the number of inclusions increased with increasing the applied current or decreasing the orifice diameter, while decreased with increasing the purity of aluminum. And also, it was found that the number of inclusions increased with increasing the amount of boron added to molten aluminum. This was found to be attributed to the formation of the inclusions of TiB and $V_3B_2$. It was investigated that the average concentration of inclusions in a constant volume of 20ml of molten aluminum was increased in the order of pure molten aluminum, molten aluminum containing 20ppm of boron and molten aluminum used repeatly in the experimental casting in this study.

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X-ray 실시간 관찰에 의한 알루미늄 합금의 응고 결함 관찰 (In-situ X-Ray Observation of Shrinkage Defect of the Aluminum Alloy Castings)

  • 조인성;김정인;임채호
    • 한국주조공학회지
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    • 제30권5호
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    • pp.174-178
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    • 2010
  • In the present study, in-situ real-time observation with an X-ray radioscopic facility was carried out on pure aluminum and aluminum alloy solidification. The three kinds of aluminum alloys, such as pure aluminum, Al-8.5%Si alloy, commercial A356 (AC4C) alloys, were used in the present study. The formations of the shrinkage defects in the castings were visualized and different formation phenomena for different aluminum alloys were investigated.