Influência da energia de soldagem nos níveis de distorções em juntas de topo soldadas pelo processo eletrodo revestido

Abstract

Welding energy affects various properties of the base metal, such as microstructural transformations generating the zone affected by the heat (ZAC), increase in ZAC size, also generate thermal gradients responsible for the appearance of residual stresses and deformations in the joint. The present work has the objective of studying the influence of the welding energy on the distortions of a welded joint. For the development of the present work will be used the coated electrode process and ABNT 1020 steel test bodies in a top joint. The welding energy will be evaluated by varying the welding speed in two levels, in order to verify the behavior in relation to the levels of distortion. Distortions will be assessed by two procedures, the first will be to measure the angular misalignment of welded joint without restriction, the second will consist of initially soldering the joint with restriction (without allowing distortion) and then removing the constraint and measuring the angular misalignment. Use a variance analysis statistic - ANOVA to analyze the results. Preliminary results show that for the same welding speed, the restriction effect is more significant than the welding speed, however, the effect of the variation of the welding speed on the response variable is statistically significant