Análisis comparativo de las propiedades mecánicas de juntas soldadas de acero ASTM A572 tratadas térmicamente

Abstract

In this project a comparative analysis of some mechanical properties of welded joints treated thermally in structural steel ASTM A572 Gr.50 was developed. The welding specimens were made applying the AWS D1.1 standard. That is, the specimens and the WPS to make the respective welds were set. Based on the ASME Section VIII Division I standard, the postweld heat treatment of annealing was performed on one of the test pieces, another test piece was subjected to a stress relief temper, and a third test piece was not subjected to any heat treatment. Each test piece was subjected to tensile tests, Charpy, hardness scanning, bending, and ultrasound. Based on the different tests it was possible to determine the variation of the microstructure and the mechanical properties (hardness, ductility, toughness) between the welded joints, in order to reach the conclusion that postweld heat treatment in joints with thicknesses greater than 38 [mm] is necessary.