Effects of pyrolusite, limestone and fluorite and ferrochrome manganese on the performance of basic electrodes with peripheral coating

Authors

  • Amado Cruz-Crespo Centro de Investigaciones de la Soldadura. Universidad Central ¨Marta Abreu¨ de Las Villas
  • Eduardo Manuel Díaz-Cedré Fabricación y Tecnología en Soldadura S.A de C.V. Queretaro
  • Americo Scotti LAPROSOLDA, Universidad Federal de Uberlândia

Keywords:

shilded metal arc welding, coated electrode, fusion and deposition rates, deposition efficiency, weld geometry

Abstract

This investigation presents the evaluation of AWS E 7018 coated electrodes based on the content of the peripheral coating components in order to improve their performance. Proportions for the coatings were estimated based on an McLean Anderson experimental design where the input variables are: X1- pyrolusite, X2- limestone+fluorite (for limestone: fluorite=1) and X3- FeCrMn. The homogenized blends were agglomerated with sodium silicate and water to form the pastes that were applied by immersion on the basic coating of the 3,2 mm diameter electrodes of the metal core. The isolines of the melting and deposition rates as well as the deposition efficiency and the bead geometry were generated for the evaluation of the electrodes. The results indicate that the composition of the coating with a better performance contributes to favorable changes compared to the electrode without peripheral coating as this increases the depth of the bead penetration, thus providing a narrower profile.

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References

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Published

2016-03-02

How to Cite

Cruz-Crespo, A., Díaz-Cedré, E. M., & Scotti, A. (2016). Effects of pyrolusite, limestone and fluorite and ferrochrome manganese on the performance of basic electrodes with peripheral coating. Minería & Geología, 31(4), 84–99. Retrieved from https://revista.ismm.edu.cu/index.php/revistamg/article/view/1142

Issue

Vol. 31 No. 4 (2015): octubre-diciembre

Section

Metalurgia física
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