Metallic Droplet, Weld Pool Temperatures Evaluation and Pulsed Wave Formulation in the Pulsed GMAW

This study analyzed the average temperature value of the metallic droplets and weldpool of the Pulsed GMAW welding process using 309L-Si electrode as the addition metal. The study was based on the formulation and evaluation of pulsed waves, starting from the equation of energy constant (or detachmen...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2020-01, Vol.23 (4)
Main Authors: Silva, Régis Henrique Gonçalves e, Nogueira, Rodrigo Rodrigues, Silva, Fernando Lucas dos Santos e, Santos, Arthur Gustavo Moreira, Brito, Uallas Henrique de Oliveira de
Format: Article
Language:English
Subjects:
Droplet
ENGINEERING, CHEMICAL
GMAW
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
pulsed
temperature
waveform
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Summary:This study analyzed the average temperature value of the metallic droplets and weldpool of the Pulsed GMAW welding process using 309L-Si electrode as the addition metal. The study was based on the formulation and evaluation of pulsed waves, starting from the equation of energy constant (or detachment constant), and waveforms from two commercial welding sources, that were evaluated and reproduced. The technique of filming by high speed infrared radiation was used for evaluation. The results point to a higher droplet temperature for a lower intensity of pulse current, due to longer dwell time at this level, and also revealing that a longer time in the base phase may be responsible for a further heating of the fusion pool.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-mr-2020-0074