Regarding carbon arc air gouging root cleaning
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Is it absolutely impossible to achieve a clean root finish on duplex steel using gas tungsten arc cutting?
It’s not absolutely impossible, but using carbon arc gouging for root cleaning on duplex steel is not recommended, as it can affect the material’s properties. .
The quality of work performed by carbon arc gas gouging isn’t very good, is it? Mechanical grinding is suitable for root cleaning
Learn from this; there are clear-minded experts who can explain it thoroughly.
The key is to carry out thorough mechanical grinding after gas gouging in order to completely remove the carburized layer.
After primary root removal, changes occur in the microstructure of duplex steel; it is necessary to continue grinding to remove the carburized layer. However, it’s difficult to determine the thickness of this layer, and there’s a high chance that it won’t be completely removed. This, in turn, affects the material’s properties. Therefore, this method is not recommended