Open AccessINFLUENCE OF DIFFERENT ASSEMBLIES ON PRE-HEATING THE HSLA SAR 80T STEEL ON COATED ELECTRODE WELDING
Author(s) -
J. S. Bastos,
Carlos Ferreira,
Mauro Carlos Lopes Souza,
Joanes Silva Dias,
N. C. O. Tapanes
Publication year - 2020
Publication title -
engenharia térmica
Language(s) - English
Resource type - Journals
ISSN - 1676-1790
DOI - 10.5380/reterm.v19i2.78612
Subject(s) - materials science , welding , electrode , micrography , metallurgy , alloy , high strength low alloy steel , base metal , spot welding , electric resistance welding , composite material , joint (building) , structural engineering , engineering , scanning electron microscope , chemistry
The present work evaluated the influence of assemblies other than preheating in the welding process obtained by coated electrode, using high strength and low alloy steel SAR 80T as the base metal and the AWS E7018 electrode as the addition metal. In order to prevent cracks, preheating and interpassing for low alloy steel was performed. Depending on the way the preheating equipment is installed, it may take more or less time to reach the preheat temperature. Different assembly arrangements for top joints were evaluated, aiming at cost reduction, in addition to evaluations of the mechanical properties of the joint. Visual testing, ultrasound, micrography, macrography and cross-sectional traction were performed. The results obtained were considered acceptable and showed that there was an influence on time, cost of preheating and resistance to impact.