Caracterização microestrutural e de propriedades mecânicas de soldas do aço ASTM A 131 pelos processos FCAW convencional e com adição de arame frio

2014-06-182014-06-182011-09-23RODRIGUES, Lino Alberto Soares. Caracterização microestrutural e de propriedades mecânicas de soldas do aço ASTM A 131 pelos processos FCAW convencional e com adição de arame frio. 2011. 144 f. Dissertação (Mestrado em Engenharia Mecânica) – Programa de Pós-Graduação em Engenharia Mecânica, Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2011. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/5092. Acesso em:.https://repositorio.ufpa.br/handle/2011/5092The work presented here show comparatively mechanical properties and microstructure of weld metals employing two welding techniques, an already disseminated, FCAW (arc welding with cored wire) and the other is innovative, FCAW-AF (arc welding with Adding Tubular Wire with a cold wire is not energized) at three levels of speed 6, 8 and 10 m / min. In this process two diameters of the cold wire 0.8 and 1.0 mm were used. The base metal used was a naval steel ASTM 131 grade A (low carbon) in geometry of plates 150 mm x 300 mm x 9.5 mm, applied to V-groove (Bisel of 22.5°) with angle 45° summed, with mild opening of root of 2.4 mm. The weld used was top type with the application of two passes, one root pass and the pass of finish (or filling). In order to establish of weld conditions 5 types of destructive were carried out: face transverse bend, tension, impact test (Charpy notched type V), microhardness and metallographic test. In addition to the non-destructive analysis visual and penetrating liquid. In general, the results for the process FCAW-CW, show themselves compatibles, regarding the process FCAW conventional, but some results showed smaller values of mechanical property. This fact much probably happened due the presence of discontinuities in the welded joint FCAW-CW. The microstructural characterization presented similar results to FCAW-CW and FCAW conventional for all energy levels studied.porAcesso AbertoPropriedade mecânicaSoldagem FCAW-AFMicroestruturaAço ASTM A 131Aço baixo carbonoMechanical propertyMicrostructureLow carbon steelCaracterização microestrutural e de propriedades mecânicas de soldas do aço ASTM A 131 pelos processos FCAW convencional e com adição de arame frioMicrostructural and mechanical properties characterization of ASTM A 131 steel welds by conventional FCAW processes and with the addition of cold wireDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO