Análise de técnicas de solda para ligas de FeCrAl

Abstract

Through bibliographical surveys in the areas of nuclear engineering and materials engineering, data and information on welding engineering and welding procedural errors were analyzed. The objective is to carry out welding with minimum losses in the physical properties of the FeCrAl alloy. This alloy has been used as a proposal for an accident-tolerant fuel coating in nuclear reactors. The objective of this work is to survey the different welding techniques and the favorable environment for it to be carried out. After analyzing safety standards and tests already carried out inside reactors, it was possible to conclude that the TIG welding process is the one that best suits the necessary parameters, as it provided welds with penetration, fewer areas affected by heat and defect levels. suitable welding and mechanical resistance. The use of helium gas in this process resulted in improved resistance to oxidation and smaller zones affected by heat, compared to other gases, as it has greater heat extraction effectiveness and difficulties in opening the arc.