ANÁLISE ESTATÍSTICA DOS PARÂMETROS DE DEPOSIÇÃO DE UM REVESTIMENTO PELO PROCESSO FCAW PULSADO COM AÇO MARTENSÍTICO 410 NiMo UTILIZANDO O MÉTODO DE TAGUCHI E MODELOS DE REGRESSÃO

Abstract

This study aimed to analyze and optimize deposition welding parameters using a pulsed Flux Cored Arc Welding process (P-FCAW), where the influence variables adopted were the average current, pulsation frequency, welding speed and the contact-tip-workpiece distance, with each variable being tested at three different levels. The geometric characteristics evaluated, that is, the response variables, are width, reinforcement, penetration, reinforcement area, penetration area and dilution. Statistical techniques were used as analysis tools, using the Taguchi method to establish which combinations of parameters would be performed in each test, providing us with an L9 matrix. Used regression models was important to select the most significant parameters, followed by multiple linear regression complete analyzes, which provided a model for maximization the parameters according to the set of responses.  It was noticed that the average current affected almost all responses, only with the exception of the reinforcement area, the welding speed only did not interfere with the penetration and the penetration area, but the contact-tip-workpiece distance significantly influenced in the reinforcement.