How are these elongated pores formed?
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This is the area where the two structural members are relatively thick; full penetration does not occur here, it is merely a fillet weld. The slightly lower one is the track, and on the other side is the section steel.
The welding speed is too fast, resulting in insufficient shielding. The welder’s skills are really terrible; what’s the point of keeping him?
The reasons for the formation of such strip-shaped pores are: 1. The welding speed is too fast, leaving no time for the gas to escape； ； 2. The welding area was not cleaned; there was too much rust, which resulted in an excessive amount of gas being produced ； 3 The welding current is too low, causing the molten pool to cool too quickly; as a result, the gas cannot be expelled in time ；
As mentioned above, it’s because the welding speed is too fast; the welding process guidelines aren’t being followed.