Study of Deposition Rate and Deposition Efficiency of AWS A5.1 E6013 and E6019 Shielded Metal Arc Welding Electrodes for Welding of ASTM A283 Steel (Undergraduate Senior Project Report - In Thai)

Abstract

Shielded Metal Arc Welding (SMAW) process has been widely used in fabrication
industry nowadays. Its advantage includes no need of gas tank required for shielding and its ability to be used for field and outside welding as well as its lower cost for welding machines compared to other welding processes. In SMAW process, the flux-covered electrodes are used to generate the arc which melt the workpiece while depositing the molten electrode to form the weld bead on the
workpieces. The deposition rate of the SMAW electrodes is an important parameter which can be different among different types of electrodes.
This senior project report is aimed to study the deposition rate and the deposition efficiency of different grades of SMAW electrodes of 3.2 mm diameter for welding of low carbon steel grade A283. The welding currents for E6013 electrode were chosen at 60, 90, and 120 amperes; whereas 85, 115, and 135 amperes were chosen for E6019 electrode. Both DCEN and DCEP electrode polarity were performed in this study. Two welds were made per each set of
parameters. The results were recorded to calculate the deposition rate and deposition efficiency for each set of welding parameters. The results showed that the increasing in welding current increases the deposition rate of both E6013 and E6019 electrodes. In addition, the penetration depths of the weldment made
using E6013 electrodes is smaller than those welded with E6019 electrodes. For E6013 electrodes, the deposition rate is higher when welding with DCEP; while the deposition rate is not much different when E6019 electrodes were used. Regarding the deposition efficiency, there seems to be no significant difference in all welding conditions.