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http://dx.doi.org/10.14775/ksmpe.2015.14.2.038

Study on The Status of Welded Parts According to The Types of Shielding Gas in TIG Welding  

Kim, Jin-Su (Computer Aided Mechanics Department of Changwon Campus Korea Polytechnic)
Kim, Bub-Hun (Industrial Facility Automation Department of Changwon Campus Korea Polytechnic)
Lee, Chil-Soon (Computer Aided Mechanics Department of Changwon Campus Korea Polytechnic)
Kim, Yohng-jo (School of Mechanical Engineering Kyungnam University)
Park, Yong-Hwan (R&D Center of KISWEL)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.14, no.2, 2015 , pp. 38-43 More about this Journal
Abstract
Tungsten inert gas (TIG) welding is commonly used in industries that require airtightness, watertightness, oiltightness, and precision. It is a non-consumable welding method that is commonly used for the welding of non-ferrous metals, but it can be used to weld most metals. The methods of TIG welding can be divided into three types. The first, manual welding is done directly on the metal by a welder with a torch. The second, semi-automatic welding, gets help from a material supplying machine, but it is conducted by a welder. Lastly, automated welding is conducted fully by a machine during its process and operation. Depending on the selection of electrode, the amount of heat that is applied to the base material and the electrode rod changes and makes the shape of welded parts different. A direct-current positive electrode was used for this study. Through the change of shielding gas type on a structural steel (SS-400) that is commonly used in industry, the composition and shape changes in welded parts were detected after welding. The heat-affected area, hardness value, and tensile strength were also identified through hardness testing and tensile testing. In this study, it was found that the higher hardness value of the heat-affected is, the weaker the tensile strength becomes.
Keywords
Tungsten inert gas Welding; Filler metal; Automatic welding; Electrode bar; Straight polarity; Structural steel; Heat affected zone;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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