Shielding gases
The most important reason to use a shielding gas is to prevent the molten metal from the
harmful effect of the air. Even small amounts of oxygen in the air will oxidise the
alloying elements and create slag inclusions. Nitrogen is solved in the hot melted mate-
rial but when it solidifies the solubility decreases and the evaporating gas will form
pores.
Nitrogen can also be a cause of brittleness. The shielding gas also influences the
welding properties and has great importance for the penetration and weld bead geom-
etry.
Supplied By RIHUI Ceramic Welding Backing
Date: 2023-04-10 hits: 581 Return
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Spot welding( RIHUI Ceramic Welding Backing) 2023-04-10