Experimental study of phenomena on electrode for Oxygen Plasma Arc Cutting torch

Abstract

An experimental study of a torch for oxygen plasma arc cutting (PAC) was conducted. We made a nozzle equipped with a window and a port for observation the hafnium (Hf) electrode during working, using a color high-speed video camera through the window. We estimated the temperature on the surface of the Hf electrode assuming the black body radiation of the surface. We could estimate the real-time flow rate of plasma gas by the pressure in the nozzle.