Estudo do desempenho da soldagem por eletrodo revestido em diferentes posições por meio de análise de variância

Abstract

Welding is a widely technique used in the world, it cover all areas of engineering. In certain circumstances, to keep the operation of a production line, the part to be welded can not be removed and consequently, the welder must adjust the welding position. There are indications in the literature that these different welding positions can change the mechanical strength of the welding samples. Thus, mechanical tests of a welded samples are conduct to evaluate their performance. The aim of this work is evaluate the hypothesis of the influence of the welding positions, on the breaking strength, of the samples welded, by the used of different types of coated electrodes. In order to get the information necessary for implementing the study, tensile tests will be conducted in 9 groups of samples welded. Each group with 10 samples where they will be welded in three positions (1G, 3G and 4G) with three different electrodes (AWS E6010 - cellulosic, AWS E6013 - rutile and AWS E7018 - basic). By the data collected in the mechanical tests, it will be used the technique of analysis of variance (ANOVA), to verify the hypothesis. For the analysis was used as a support tool to supplement the statistical methodology Action version 2.8 (2014), working in an integrated manner to popular software from Microsoft Excel spreadsheets. With the application of ANOVA was established that the welds of samples run on 1G position (Plan), had a higher breaking strength for all the studied electrodes. Samples soldiers with E7018 electrode showed higher breaking strength compared to the other electrodes, and in the 3G position, the comparative results showed no significant differences.