Welding porosity can lead to decreased weld strength, increased susceptibility to cracking, diminished welding appearance, compromised material properties, and increased difficulty in subsequent processing. Therefore, let's analyze several possible reasons for the occurrence of welding porosity:
1. Dirt, oil, or other impurities on the workpiece can introduce gas into the welding pool.
2. Moisture in the material can decompose into hydrogen gas during welding, becoming trapped and causing porosity.
3. Insufficient shielding gas flow or turbulence can expose the weld pool to the atmosphere, resulting in porosity.
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