What are the common sand substances found in LSAW workshops? In fact, the substances similar to sand produced after welding are the residual slag and incompletely melted flux particles of the submerged arc welding flux. These are the normal process products of double-sided longitudinal seam submerged arc welding, which have both protective and metallurgical functions and need to be cleaned up after welding.
Welding slag (solid slag shell)
Source: After the flux is melted by the electric arc, it reacts with impurities in the weld seam to form slag, which then covers the surface of the weld seam after cooling
Function: Isolate air to prevent oxidation, stabilize arc, oxygen and desulfurization, fix the molten pool and prevent loss
Not melt flux particles
Source: Flux that has not been melted by the arc during welding, with a coating thickness of ≥20mm
Function: It serves to protect against electric arcs, reduce noise and prevent dust
After welding, the slag shell is generally removed with a pneumatic pick or slag hammer, and then ground with a wire brush or grinding wheel to ensure that there is no residue on the surface of the weld seam, which is convenient for quality inspection and subsequent processes.
