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자료유형
학술저널
저자정보
이형근 (한밭대학교) 방경식 (한국원자력연구원)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第33卷 第5號
발행연도
2015.10
수록면
47 - 52 (6page)

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In this study, it was tried to analyze the effects of welding parameters on the weld penetration and aspect ratio when a STS316L pipe was welded in a horizontal position by GTAW. Experiments were systematically designed using a L18 orthogonal array, and the effects of welding parameters were statistically analyzed by ANOVA(Analysis of Variance). The shielding gas type has the largest effect on both the penetration and aspect ratio. The welding current type and shielding gas flow rate have a little effect on the penetration, whereas the electrode tip angle has a little effect on the aspect ratio. When welded at a selected welding condition, which is composed of He shielding gas, pulse current of 300/45 A, electrode tip angle of 90o, and shielding gas flow rate of 30 l/min, the estimated interval at least 95 % confidence was 1.99 ± 0.18 ㎜ for the penetration and 0.31 ± 0.04 for the aspect ratio. From the confirmation experiments, the average penetration and aspect ratio were well agreed with the estimation as 1.96 ㎜ and 0.30, respectively. Additionally, the effects of the welding speed and welding current on the penetration and aspect ratio were experimented and analyzed by linear regression. The penetration was linearly increased with the decrease of the welding speed and with the increase of the welding current, but the aspect ratio showed a tendency to a little decrease with the increase of both the welding speed and current.

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Abstract
1. 서론
2. 실험 방법
3. 실험결과의 분석 및 검토
4. 결론
References

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UCI(KEPA) : I410-ECN-0101-2016-581-002081624