Читать книгу Welding Metallurgy - Sindo Kou - Страница 89

As shown previously in Figure 2.11, in gas−tungsten arc welding (GTAW) the tip angle of the tungsten electrode has a significant effect on the shape of the arc. The arc tends to become more constricted as the electrode tip changes from sharp to blunt. The change in the shape of the electrode tip changes fluid flow and heat transfer in the arc, which in turn changes the shape of the arc.