• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집 특별세미나,특별/일반세션
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• pp.559-564
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• 2009

Aluminum extrude is increasing to vehicle body manufacture of a recent railroad vehicle. Conventional welding of this aluminum extrude has been used MIG welding or resistance spot welding mainly. But the advanced manufactures like Japan's tried to apply the friction stir welding and friction spot joining at railroad vehicle body manufacture process. Therefore in this paper we tried to study to apply friction stir welding to AL 6005-T6 extrude which has been manufactured the railroad vehicle mainly. In this study we investigated first the mechanisms to affect the welding strength in friction stir welding. After we made the 3 tools of different shape, we observed how the welding strength changed while changing the welding time and the rotation speed, the plunging depth.

• Journal of Welding and Joining
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• 제27권5호
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• pp.16-20
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• 2009

• Journal of Welding and Joining
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• 제30권2호
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• pp.31-36
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• 2012

• Journal of Welding and Joining
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• 제28권6호
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• pp.15-20
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• 2010

• Journal of Welding and Joining
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• 제22권2호
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• pp.23-27
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• 2004

최근 레이저-아크 하이브리드용접에 대한 연구가 활발히 진행되고 있다. 이미 고출력 $CO_2$ 레이저가 보편화되면서 레이저용접이 차체제작에 널리 사용되고 있으며 고출력 Nd:YAG 레이저의 출현으로 알루미늄 레이저용접의 적용 가능성이 크게 증가하였을 뿐만 아니라 광화이버를 통하여 빔을 전달할 수 있어 좀 더 복잡하고 입체적인 물체를 용접할 수 있는 로봇 레이저 용접을 구현할 수 있게 되었다.(중략)

• Journal of Welding and Joining
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• 제29권4호
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• pp.30-34
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• 2011

• Journal of Welding and Joining
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• 제22권3호
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• pp.32-38
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• 2004

알루미늄은 중량대 강도의 비가 여타의 구조용 재질에 비해 뛰어나고 가공 및 용접성이 양호하기 때문에 수송수단의 경량화를 위해서는 가장 좋은 재질로 인정되고 있다. 또한 표면의 산화막은 내부식성을 향상시키므로 차량의 수명 향상에 기여할 수 있고, 우수한 재활용성은 환경 보전에도 기여할 수 있다.(중략)

• Journal of Welding and Joining
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• 제22권3호
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• pp.39-44
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• 2004

최근 국내외적으로 환경규제가 강화되면서 소형선의 경우 FRP선의 폐선처리가 문제시되면서 알루미늄선에 대한 관심이 고조되고 있다. 이러한 알루미늄선의 건조는 철강재 등 여러 재료에 비해 알루미늄은 비강도가 높아 경량화에 의한 고속화가 가능하고 높은 내식성에 의한 유지보수가 용이하며, 폐선시 재활용이 가능하여 환경 친화적이라는 이점이 있기 때문이다.(중략)

• 소성∙가공
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• 제26권6호
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• pp.348-355
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• 2017

In recent years, dissimilar materials such as aluminum, magnesium, titanium, and advanced high strength steel are widely used in automotive body due to environment concerns and fuel consumption. Therefore, joining technology is important for assembling components made of dissimilar materials. In this study, friction stir hole clinching (FSHC) was proposed as a new mechanical joining method to join dissimilar materials. This process stirs and heats the upper sheet, forming mechanical interlocking with the lower sheet. The feasibility of this FSHC process was verified by comparing cross-section of joint in FSHC and hole clinching process under the same processing condition. Taguchi method was also applied to the FSHC process to estimate the effect of process parameters on joint strength and obtain optimal combination of process parameters. Joint strength of FSHC with optimal process condition was compared to that of FSHC with initial process condition as well as that of hole clinching with optimal process condition. Results showed that the FSHC process was useful for joining dissimilar materials, even if the formability of materials was low.

• Journal of Welding and Joining
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• 제25권3호
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• pp.51-56
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• 2007

A $CO_2$ laser overlay was conducted by using a Fe-based powder on the AC2B aluminum substrate. Cracks and intermetallic compounds (IMC) were observed inconsistently along the interface between the overlay and post-molten layer. A scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) detected some Fe-rich IMC ($Fe_3Al$, FeAl) as well as the brittle Al-rich IMC ($Fe_2Al_5,\;FeAl_3$). Micro vickers hardness proved the formation of Al-rich IMC ($FeAl_3$) along the interface by showing HV0.1 $800{\sim}900$. Furthermore, nano indentation was successfully applied to investigate the behavior of IMC more precisely than the micro vickers hardness.