Abstract

GONZALEZ CABRERA, Odonel; GOMEZ PEREZ, Carlos Rene  and  DEL PINO PAZ, Uvedel Bernabé. Methodology for the Selection of the Best Variant Between Double Coated Electrodes for Hardfacing. TecnoL. [online]. 2020, vol.23, n.49, pp.53-62. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1608.

This study aims to establish a methodology for selecting the best variant to be employed under certain conditions of a consumable electrode to address wear phenomena. In addition, it should combine the main parameters that can provide criteria for this purpose. As part of the methodology, some of the selected criteria include arc stability tests and tests to determine the consumption parameters of electrodes which assess their operational behavior. For the former, arc conductivity is calculated; and for the later, the deposition coefficient. Regarding the evolution of the deposit, we decide to measure wear resistance based on loss of mass using the pin abrasion test. The values obtained in these three tests are randomized and subjected to expert criteria. Then, the experts’ assessments are processed, and the weight they give to each parameter is estimated mathematically through regression equations. The variant with the external alloying charge is unanimously selected as the best double-coated electrode variant. The results of the analysis performed to choose the best variant suggest that wear resistance (assessed based on loss of mass) is the most relevant criterion for selecting electrodes intended for hardfacing parts.

Keywords : Hardfacing electrodes; expert criteria; best variant; wear resistance.

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