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http://dx.doi.org/10.5916/jkosme.2013.37.1.29

A study on the titanium welding process according to the temperature characteristics of shielding methods  

Chung, Han-Shik (경상대학교 정밀기계공학과, 해양산업연구소)
Jeong, Hyo-Min (경상대학교 정밀기계공학과)
Lee, Dae-Chul (경상대학교 정밀기계공학과)
Lee, Byeong-Yong (경상대학교 정밀기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.37, no.1, 2013 , pp. 29-34 More about this Journal
Abstract
The welds tent to be weakened if it is exposed to the air during the welding process. In titanium welding with Gas Tungsten Arc Welding, inappropriate colors of the welds, such as purple/red, blue, yellow, gray, white and pink represents that it is contaminated by oxygen and nitrogen in the air. Shielding gases can be used to protect welds from the contamination. In addition, Weld metal and heat affected zone (HAZ) are also shielded from the air when it is cooled down to the room temperature. In this paper, appropriate shielding gases for the shape and form of Trailing Shielding Jig and torch shielding ($13{\sim}20{\ell}/min$), after shielding ($22{\sim}30{\ell}/min$), and back shielding ($25{\sim}30{\ell}/min$) are studied.
Keywords
Ti Welding; Gas Tungsten Arc; Shielding Gas; Trailing Shielding (Secondary Shielding);
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