MARQUES, L. N.; http://lattes.cnpq.br/3754473953019217; MARQUES, Lívia Neves.
Résumé:
In this study, the influence of the parameters, process and welding procedures
on susceptibility to hydrogen induced cold cracking in API 5L X80 steel welded
joints . Were evaluated for this Implant Test using SMAW and FCAW process
with different parameters and welding procedures. Were used AWS E 91T8-K8
with 1,60 mm diameter self protected and AWS E 91T1-G with 1,20 mm
diameter gas protected . And AWS E 8010 e AWS E 8018-G, with diameter
4,00 mm. After welding the specimens were cut and cracks and microcracks
were identified for each welding condition and the results associated with the
microstructure and microhardness value in the region where cracking occurred.
It was verified that all cracks occurred were predominantly composed of Bainite
and Primary Ferrite All cracks were intergranular but do not represented a
significant size, as all the microhardness values were less than 238,1 HV it is
possible to say that the steel studied has a good weldability and it is not likely to
be susceptible to hydrogen induced cold cracking for the analyzed conditions
