Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso / Influence of TIG welding process parameters on the quality of a piece fabricated with silicon electrical steel

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The TIG welding process (Tungsten Inert Gas), also known as GTAW (Gas Tungsten ArcWelding), is the most commonly used process for welding of thin plates where there is a need for an excellent control of the temperature applied on the piece. This paper presents a study carried out in partnership between the Department of Graduate Studies in Scienceand Materials Engineering and the Department of Industrial Engineering and Stamping of WEG Equipamentos Elétricos S.A Motors Division. It elaborates on the use of the experimental methodology DOE to investigate the influence of TIG welding process parameters, electrical current, welding speed and flow of the shielding gas on the quality of a piece fabricated with silicon electrical steel - ABNT 50F 466M, best known for its 50A 400 specification on the JIS standard. The first step of the study was the designing of the experiment to obtain welded pieces with different combinations of the parameters above mentioned and enable the evaluation of mechanical strength, fillet weld size, hardness and metallographic analysis of the test specimens. The information obtained with analysis of variance techniques (ANOVA) showed that the change in the levels of electrical current and welding speed promotes significant changes in final results. Furthermore, the different rates of gas flow tested caused no differences in response variables of the study. As a result, it was also possible to determine the combinations of these parameters that ensure the required quality and provide increased productivity, energy saving and reduced consumption of the shielding gas.

ASSUNTO(S)

soldagem tig otimização dos parâmetros desoldagem doe methodology metais aço elétrico silicioso optimization of welding parameters engenharia de materiais e metalurgica silicon electrical steel tig welding metodologia doe

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