| 摘要 |
<p>The tip of a tungsten electrode (1) is polished to a cone shape or a polygonal pyramid shape, and a certain slit being along the central axis of the tip portion and having a width of 0.75 mm to 1.5 mm is provided from the tip to base end side of the electrode (1) along the axis direction, obtaining the TIG arc welding electrode (1) in which at least two or more tips are formed on mutually opposite sides of the slit, near the center of the electrode (1). The TIG welding tungsten electrode (1) can be obtained with which in a large current region, welding is possible without occurrence of an irregular bead and even in a small current region, the arc concentration can be kept and it can be avoided that the arc unevenly occurs, so beads meander and the width of a bead becomes thin, resulting in a protruding bead.</p> |
