| 순 Ti 박판 GTA 용접부의 기계적 성질 및 성형성에 미치는 공정변수의 영향 |
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| The Effect of Process Variables on Mechanical Properties and Formability in GTA Welds of Commercial Pure Titanium Sheet |
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Jee-hoon Kim, Jae-keun Hong, Jong-taek Yeom, Nho-kwang Park, Chung-yun Kang |
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| Abstract |
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In this work, the effect of welding variables on weldability of gas tungsten arc(GTA) welding was investigated with experimental analysis for a co㎜ercial pure(CP) titanium (Grade.1). The GTA welding tests on sheet samples with 0.5㎜ in thick were carried out at different process variables such as arc length, welding speed and electrode shape. In order to search an optimum arc length with full penetration, beadon-plate welding before butt-welding were performed with different arc length conditions. From the beadon-plate welding results, the optimum condition considering arc stability and electrode loss was obtained in the arc length of 0.8㎜. Butt-welding tests based on the arc length of 0.8㎜ were carried out to achieve the optimum conditions of welding speed and electrode shape. Optimum conditions of welding speed and electrode shape were suggested as 10 ㎜/s and truncated electrode shape, respectively. It was successfully validated by the microstructural observation, tensile tests, micro-hardness tests and formability tests. |
| Key Words:
GTAW, Commercial pure titanium, Process variables, Arc length, Formability |
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