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http://dx.doi.org/10.5781/JWJ.2016.34.5.6

The Study for Improving the Weldability of Pure Titanium Sheet by Using Fiber Laser - The Effect of Shielding Gas Nozzle Variable -  

Kim, Jong-Do (Division of Marine Engineering, Korea Maritime and Ocean Univ.)
Kim, Ji-Sung (Graduate School, Korea Maritime and Ocean Univ.)
Publication Information
Journal of Welding and Joining / v.34, no.5, 2016 , pp. 6-12 More about this Journal
Abstract
This study was performed bead welding of pure titanium by using fiber laser. Since titanium is very sensitive to oxidation and nitriding during welding, it is important to compose the shielding equipment compared with different material. Thus side and coaxial shield nozzle, rail and chamber type shielding equipment are widely used to protect effectively the weld during welding. Experiments were performed by changing nozzle angle and distance using side and coaxial shield nozzle. The bead colors of gold, brown, blue, purple and yellowish white were obtained by changing variables of shield nozzle, and then its weldability was investigated. As experiment result, sound and not brominated beads were formed when side nozzle angle and distance were respectively $45^{\circ}$ and 10 mm.
Keywords
Pure titanium; Laser welding; Fiber laser; Side shield nozzle; Coaxial shield nozzle; Nozzle angle; Nozzle distance; Oxidation; Nitriding;
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Times Cited By KSCI : 2  (Citation Analysis)
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