Análise da influência da corrente e velocidade de goivagem no processo de goivagem a arco plasma através de resultados geométricos da remoção.

Abstract

This work aims to be an experimental procedure to study gouging parameters on interest regions of ASTM A131 EH36 steel plates, to meet adequate geometric requirements in future researchs, such as average width and penetration, through the results analysis by Plasma Arc. In order to know the speed and current influence used in the plasma gouging process on the obtained values of width and penetration, this work proposes practical tests by varying the gouging speed in 03 levels around the optimal cutting speed by 03 different current values, thus evaluating the geometric parameters. Was carried out as one of the initial stages of the research project in partnership with Petrobras, which aims to evaluate how many times is possible to perform repairs on ASTM A131 AH36, ASTM A131 DH36 and ASTM A131 EH36 steels joints, submitted to welding, removal (plasma arc gouging) and repair. The number of removals and repairs was varied in order to determine as many repairs as possible so that the joint mechanical properties are within an acceptable range by the standard.