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Physics Asked by a SnapAndSolve user · about 2 hours ago

Porosity What causes is? How can you prevent it?

Porosity
What causes is?
How can you prevent it?
Under Cut
What causes is?
How can you prevent it?
Spatter
What causes is?
How can you prevent it?
Burn Through
What causes is?
How can you prevent it?
Craters
What causes is?
How can you prevent it?
Incorrect Voltage
What causes is?
How can you prevent it?

Answer

  1. Porosity
    1. What causes it? Porosity is caused by trapped gas bubbles in the weld metal, often due to contamination, moisture, or improper shielding gas.
    2. How can you prevent it? Ensure proper cleaning of materials, use the correct shielding gas, and maintain appropriate welding parameters.
  2. Under Cut
    1. What causes it? Under cut is caused by excessive welding speed or incorrect angle, leading to grooves along the weld toe.
    2. How can you prevent it? Adjust the welding speed and angle, and ensure proper heat input.
  3. Spatter
    1. What causes it? Spatter is caused by droplets of molten material expelled from the weld, often due to high welding current or incorrect polarity.
    2. How can you prevent it? Use the correct current settings, maintain a stable arc, and adjust the electrode angle.
  4. Burn Through
    1. What causes it? Burn through occurs when excessive heat melts through the base metal, often due to high current or thin materials.
    2. How can you prevent it? Use lower current settings, adjust travel speed, and use backing bars if necessary.
  5. Craters
    1. What causes it? Craters are caused by the abrupt termination of the weld, leading to a depression at the end.
    2. How can you prevent it? Gradually reduce the welding current at the end of the weld and fill the crater before stopping.
  6. Incorrect Voltage
    1. What causes it? Incorrect voltage can lead to poor weld quality, often due to improper machine settings.
    2. How can you prevent it? Ensure the welding machine is set to the correct voltage for the material and process being used.

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