Use of Epoxy-Modified Flux Systems for Underwater Submerged ARC Welding

Keywords

underwater welding, submerged arc welding, epoxy flux, cooling rate control, pore suppression

Abstract

This study investigated the synergistic mechanism of the epoxy-modified flux system in underwater submerged arc welding (USAW). Quantitative analysis showed that adding 40 wt % epoxy resin to HJ350 flux could reduce the cooling rate (V500) to 19.57 °C/s and the porosity to 0.35%. X-ray tomography determined that the main droplet transport mode was indirect repulsion transfer (81.8 %), and the droplet diameter was reduced by 31.3% compared with conventional wet welding.

References

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