Abstract：The morphology, origin and forming reason of tungsten inclusion in tungsten-containing superalloy was investigated systematically. The results demonstrate that tungsten electrode for the welding of tungsten-containing superalloy electrode was the origin of tungsten inclusion. The loss of tungsten electrode for argon arc welding was the forming reason of tungsten inclusion. The true plasmas arc cannot form because of the unreasonable structure of welding torch for plasmas welding. Thus, the capacity to heat was decreasing. In the same times, with the increasing of electric current for welding, the probability of tungsten electrode melting was increasing, and the probability of tungsten inclusion was increasing.
2014, Vol. 21 
