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http://dx.doi.org/10.7735/ksmte.2012.21.6.915

A Study on the Radiograph Inspection of Specimen in Welding Pass Using ATOS 80 High-strength Steel  

Baek, Jung-Hwan (조선대학교 대학원 기계공학과)
Choi, Byung-Ky (조선대학교 공과대학 기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.21, no.6, 2012 , pp. 915-919 More about this Journal
Abstract
In constructing all kinds of equipment and steel structure, parts with discontinuities such as weld defects formed in the welded structure can generate fatigue cracks that results in damage or accidents. In this study, weld zones are investigated with X-rays and the latent images are put on film. Weld zone defects can be verified by developing the film. As weld defects are investigated by radiographic testing and correlated with the welding condition, more appropriate welding conditions can be found. According to the result of X-ray radiographic inspection of butt welding ATOS 80 high-strength steel with a thickness of 12mm, the best conditions for welding without creating weld defects are 4 weld-passes, a protective gas of 20% $CO_2$ and 80% Ar, a protective gas flow of 20L/min, a welding current of 200A, an arc voltage of 24V, a welding speed of 14.4cm/min, a welding rod angle of $50^{\circ}$, a welding gap of 5 mm with a ceramic base, and sand pre-heating to $160^{\circ}$ Celsius prior to welding.
Keywords
Welding conditions; Weld pass; High-strength steel; Structure; Fatigue crack; Butt Welding;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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