Metal transfer measurements in gas metal are welding

The present work reports results obtained using combined laser shadowing and cross correlation techniques to investigate the metal transfer process. Experimental results of the droplet size and velocity of 0.9 mm and 1.2 mm wires from the globular region to the spray transfer region are presented. The results indicate that the droplet size is not continuous in the narrow region of mode transition, and also preferred bands of droplet size exist. Droplet velocity measurements show good agreement with a simple model based only on the electromagnetic pinch force.