• Title/Summary/Keyword: $CO_2$ 용접

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A Study on the Optimum Tandem Welding Torch Distance for the Reduction of CO2 Shielding Gas Consumption (Tandem 용접 CO2 보호가스 사용량 감소를 위한 최적 토치 극간거리에 대한 연구)

  • Lee, Jun-Yong;Kim, Ill-Soo;Choi, Young-Do
    • Journal of Advanced Marine Engineering and Technology
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    • v.36 no.2
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    • pp.294-301
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    • 2012

  • Shipbuilding industry has used a lot of $CO_2$ gas as a shielding gas for arc welding and thus, development of welding equipment which can reduce the amount of $CO_2$ gas is requested widely. Therefore, this study is focused on the examination of optimum welding torch distance of Tandem welding system as a fundamental study for the optimum shape design of torch nozzle. $CO_2$ shielding gas distribution and welding bead shape formation by the torch distance are examined. Results show that according to the torch distance variation, most effective shielding gas layer can be formed and quantitative determination of the optimum torch distance can result in the reduction of $CO_2$ shielding gas consumption.

  • https://doi.org/10.5916/jkosme.2012.36.2.294 인용 PDF KSCI

A study on the mechanical properties of structure rolled steel and stainless steel for the CO2 welding (구조용 압연강재와 스테인리스강재의 CO2 용접에 대한 기계적 특성연구)

  • Lim, Jong Young;Yoon, Myung Jin;Kim, Tae Hyun;Kim, Sang Youn;Kim, Tae Gyu
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.23 no.4
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    • pp.207-212
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    • 2013

  • It is well known that fatigue failure occur on welded structures in industrial application due to the repetitive load force. In order to decrease the fatigue failure, we analysed the mechanical properties based on their structural aspect, roll steel (SS 400) welded onto stainless steels (STS 304) by $CO_2$ gas as well as structure roll steel welded onto itself. We compared the hardness, tensile and fatigue properties with two kinds of samples which had no defects on the welding part observed by X-ray topographic analysis. It was recognized that the tensile and fatigue strength of SS 400 welded onto itself by $CO_2$ gas was higher than that of SS 400 welded onto STS 304.

  • https://doi.org/10.6111/JKCGCT.2013.23.4.207 인용 PDF KSCI

Effect of Shielding Gas on the MAG Welding Characteristics and Cost Reduction (MAG용접시 보호가스 조성변화에 의한 용접특성 변화 및 원가절감)

  • Killing, R.
    • Journal of Welding and Joining
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    • v.12 no.1
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    • pp.51-58
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    • 1994

  • Amount of spatter, welding conditions and welding costs were investigated for MAG welding. $CO_2$, Ar+18%;$CO_2$ and Ar+8%$O_2$ were used for shielding gases. As results, arc characteristics and appropriate range for welding were obtained. Amount of spatter in Ar+18%$CO_2$ gas welding was 20% of that of $CO_2$ welding, and Ar+8%$O_2$ was 10% of that of $CO_2$ welding. Therefore by using Ar+18%$CO_2$and Ar+8%$O_2$ gases, welding costs could be reduced compared with $CO_2$ welding due to avoiding spatter.

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