Análisis de soldabilidad y propiedades mecánicas de una tubería de revestimiento (casing) en juntas soldadas con el proceso FCAW Innershield y Outershield

Abstract

This research paper deals with the analysis of weldability of welded joints of casing pipes (API 5CT) with FCAW process with self-protected tubular wire (Innershield) and gaseous protection tubular wire (Outershield). The objective of this investigation is to determine the mechanical properties and defects in the welded joints with the two different contribution materials to be able to compare and choose the best welding process. The high hardness of the API 5CT pipe limits the possibility of carrying out a welding process, which establishes parameters such as preheating, slow cooling and post-welding heat treatment to determine an adequate thermal cycle and minimize the presence of problems during welding and defects in the welded joint. Through different procedures the experimental part is performed to analyze the mechanical properties with non-destructive and destructive tests, and the results obtained can be ordered, discussed and compared with AWS D1.1 and API 1104 standards, to choose the best welding procedure. Finally, with the results of the different tests performed, they are compared to the standards, it is determined that the best procedure is the FCAW process with tubular wire with gas protection.