In order to study the effect of anti-spatter fluid overuse and accumulation during welding process, overlaying tests are implemented to analyze the state changes of different types and accumulation of anti-spatter fluid in the welding process and its effect on molten pool fluidity, arc stability and weld geometry. The results show that once the accumulated amount of oil-based anti-spatter fluid is greater than 0.045 mL·cm,-2, some of the anti-spatter fluid will enter into the molten pool, which in turn reduces the fluidity of the molten pool, resulting in the accumulation of molten metal behind the arc, while the anti-spatter fluid will be in direct contact with the arc. The water-based anti-spatter fluid moves forward and evaporates rapidly under the arc heat plus pressure and does not enter into the molten pool even at accumulation of 0.227 mL·cm,-2, thus it has no influence on the fluidity of the molten pool. The arc stability of the water-based anti-spatter fluid is significantly better than that of the oil-based anti-spatter fluid, especially when the accumulated amount is less than 0.09 mL·cm,-2,. Under the influence of two types of anti-spatter fluids, the overall weld geometry is basically the same and only weld penetration is about 0.5 mm lower than that without anti-spatter fluids, while the weld reinforcement and width have no evident changes.
anti-spatter fluidmolten pool fluidityarc stabilityweld geometry
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