Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MACROSTRUCTURE, MICROSTRUCTURE AND MICROHARDNESS OF AN AISI SAE 1020 STEEL WELDED JOINT BY GMAW ACTIVE GAS PROCESS
Submission Author:
Taiane Pereira Pantoja , PA
Co-Authors:
Gianfranco Stieven, Daniele Soares, Taiane Pereira Pantoja, EDILMA OLIVEIRA, Erb Lins, Jorge Lopes
Presenter: Gianfranco Stieven
doi://10.26678/ABCM.COBEM2019.COB2019-1233
Abstract
The Gas Metal Arc Welding (GMAW) process is commonly employed in the manufacture and maintenance of metal parts and equipment. However, this process has greater sensitivity to the variation of the electric parameters of welding arc operation, which influence the quality of the weld, and still needs a strict adjustment of parameters to obtain a certain set of characteristics for the bead weld. Therefore, papers are developed with the purpose of promoting improvements in the GMAW process and the quality of welded joint. Thus, this work aims to characterize an AISI SAE 1020 steel-welded joint with electrode ER80S-G by the MAG welding process, analyzing its macrostructure, microstructure and microhardness, given a fixed set of welding parameters, such as voltage, nozzle-to-work distance, feed rate, welding speed etc. Due to the welding parameters used during the process, the macrostructure revealed a little discontinuity in the part caused by lack of penetration. The microhardness, on its turn, combined with the microstructure analysis, revealed that the central region of the root of weld, and the top of the bead weld, presented higher microhardness, in the order of 250 and 300 HV, respectively.
Keywords
MAG welding, AISI SAE 1020 steel, macrostructure, Microstructure, Microhardness
