Role of the coating on the behavior of a tubular electrode to coating parts of the sugar industry

Abstract

At the paper it is reported the effect of coated factor in the behavior of coated tubular electrodes for hardfacing by SMAW of components of the sugar industry, as to consumption parameters and the geometry of the deposited metal. The electrodes were made with different coating thickness for a fixed diameter of the metal tube and coating composition, in order to value the exclusive influence that the thickness has. Each coating factor (relation between the total diameter of the electrode and the diameter of the metal tube) was evaluated as a function of the variation in welding current. Deposits over the metal plate were made, letting evaluate the geometrical dimensions of the welding bead and the consumption parameter of electrodes. Was concluded that for those electrodes the value of the coating factor have to be 1,2 and showing the best integral performance for the hardfacing of pieces around an average welding current of 100 A.