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Artigos • Matéria (Rio J.) 27 (2) • 2022 • https://doi.org/10.1590/S1517-707620220002.1310   copy

Analysis of Multi-Pass welding by using design of experiment on the maintenance of ASTM A131 Grade A steel

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The study consists on the analysis of the relation between multibead welding and the electric current used on maintenance welding of an ASTM A131 grade A steel, by using the shield metal arc welding process and a design of experiment to identify the factors with most influence and if there is relation between the studied factors. Between the main results the heat affected zone of the samples reached the lower extremity of the plate thickness, however the hardness values for the affected extremities show a hardness value identical to the base metal. For use in a repair situation, the desired configuration would be the one presenting 2 weld beads as the CP4 (1,15kJ/mm and 1,37kJ/mm) for having the lowest microhardness values on the welded joint.

Keywords
Maintenance welding; Shipbuilding steel; Shielded metal arc welding

Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2 Av. Moniz Aragão, 207, 21941-594, Rio de Janeiro, RJ, Brasil, Tel: +55 (21) 3938-8791 - Rio de Janeiro - RJ - Brazil
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