MATEC Web Conf.
Volume 338, 202134th Scientific Conference: Problems of Working Machines Development (PRMR 2021)
|Number of page(s)||11|
|Published online||25 June 2021|
Detection of slag inclusions using infrared thermal imagining system
Silesian University of Technology, Faculty of Mechanical Engineering, Department of Fundamentals of Machinery Design, 18A Konarskiego Street, 44-100, Gliwice, Poland
2 Silesian University of Technology, Faculty of Mechanical Engineering, Department of Welding Engineering, 18A Konarskiego Street, 44-100, Gliwice, Poland
* Corresponding author: firstname.lastname@example.org
Assuring high quality of welded joins is a vital task in many industrial branches also when joints are made manually. It is the case metal-arc welding with covered electrode. One of main imperfection, that can occur in this process is slag inclusion. In the paper an method for detection of slag inclusion in multipass manual welding is proposed and validated. The key idea of the method is that small temperature disturbances will be noticeable in consecutive cross-section of joint in the cooling pass. Temperature distribution weld face was measured with longwave infrared camera (LWIR). For consecutive cross-section made in IR representation of joint differences in mean temperature was calculated to assess the cooling rate directly after the elements were welded. It can be made because on each thermogram the whole joint is visible, thus position of electrode in time can be easily marked. Results of slag inclusion detection were compared with radiographic images of made joints. In the future additional studies will be performed in order to generalize proposed method to wider group of materials and for more complex welds.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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