WELDABILITY OF ULTRALOW CARBON STEEL MICROALLOYED WITH NIOBIUM AND VANADIUM

Authors

  • Martí­n Saavedra
  • Luis Béjar
  • Ariosto Medina
  • José L. Bernal
  • L. Zamora
  • Sergio Anguiano

Abstract

An experimental steel with ultralow carbon content for  structural applications microalloyed with niobium and vanadium (0.02% C, 0.14% Nb and 0.15% V) was produced by casting in an electrical induction oven and then thermomechanically treated.This steel was welded by submerged arc welding process applying an electrode EM13k according to the specifications of the American Welding Society (AWS). Steel microstructures and mechanical properties were studied applying optical microscopy, tensile and hardness tests. The results showed that microalloyed steel had a microstructure composed of ferrite and perlite. Steel had a tensile strength of 564 MPa and hardness value of   89.5 HRB . Weld deposit of the welded joint had a tensile strength of 590 MPa and a hardness value varying from 90 to 95 HRB. Welded joint had no cracking. The aim of this work was to design a welding procedure to weld a microalloyed steel with niobium and vanadium to avoid cracking  problems as well as to evaluate the microstructural and mechanicals properties of the welded joint.

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Published

2012-04-29

How to Cite

Saavedra, M., Béjar, L., Medina, A., Bernal, J. L., Zamora, L., & Anguiano, S. (2012). WELDABILITY OF ULTRALOW CARBON STEEL MICROALLOYED WITH NIOBIUM AND VANADIUM. LatinAmerican Journal of Metallurgy and Materials, (1), 10–15. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/340

Issue

2012, S4

Section

Supplementary Articles

License

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