Análisis mecánico y microestructural en soldadura de fundición dúctil, mediante procedimiento TIG, con diferentes materiales de aporte y enfriamiento al aire

Jorge  Martínez Alcón; Manuel  Pascual Guillamón; Lorenzo  Solano García; Fidel  Salas Vicente

doi:10.3989/revmetalm.194

Authors

Jorge Martínez Alcón PhD student at the Department of Mechanical and Materials Engineering, Polytechnic University of Valencia https://orcid.org/0000-0001-6139-5059
Manuel Pascual Guillamón Institute of Materials Technology, Polytechnic University of Valencia https://orcid.org/0000-0003-0216-5119
Lorenzo Solano García Department of Mechanical and Materials Engineering, Polytechnic University of Valencia https://orcid.org/0000-0003-0535-314X
Fidel Salas Vicente Institute of Materials Technology, Polytechnic University of Valencia https://orcid.org/0000-0003-0834-4425

DOI:

https://doi.org/10.3989/revmetalm.194

Keywords:

Base metal, Interface-weld bead, Ductile cast iron, Repair, TIG weldability

Abstract

The present work analyses the strength and microstuctural variations of ductile cast iron welded by means of the TIG technique, without heat treatment and using different filler materials (pearlitic malleable cast iron, Fe-Ni alloy and bronze and manganese alloy). The specimens for the mechanical and microstructural tests are obtained from each welded coupon with dimensions 100x 100x6 mm. Based on the qualitative analysis of the micrographs and the quantitative analysis of the results of the mechanical tests, which have been carried out in well-differentiated areas of the welded joints (base metal, interface and weld bead), it is concluded that this type of welding and the introduction of new variables such as the heat treatments before and/or after welding are suitable. The mechanical and strength characteristics have been correlated with the microstructures obtained in the plates (specimens) in order to evaluate their advantages and disadvantages, as well as to draw conclusions.

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