What affects weld bead?

What factors affect a weld bead shape?

The shape of the weld is divided into factors such as length, angle, and area, and the effect of each factor on the fatigue strength was analyzed. The fatigue strength increased with the increase of the length of the legs and the length between the upper plate and the lower plate.

What adjustments change weld bead reinforcement?

Increase in water depth or pressure decreases bead width, but increases penetration, and reinforcement. Increase in voltage will increase bead width, penetration, and reinforcement.

Why are my weld beads flat?

The goal is to create a smooth, flat weld bead. … If a concave weld bead appears in the flat or horizontal position, it’s often the result of voltage that’s too high, wire feed speed that is too slow or travel speed that is too fast.

What is form factor in welding?

If a weld is sectioned transversely and then polished and etched, the cross-sectional shape of the weld can be seen. … A shape factor, defined by the width to depth ratio, sometimes known as ‘form factor’, can be determined.

How can weld defects be reduced?

Remedies:

  1. Preheat the metal as required.
  2. Provide proper cooling of the weld area.
  3. Use proper joint design.
  4. Remove impurities.
  5. Use appropriate metal.
  6. Make sure to weld a sufficient sectional area.
  7. Use proper welding speed and amperage current.
  8. To prevent crater cracks make sure that the crater is properly filled.
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What causes lack of fusion in MIG welding?

The most common cause of lack of fusion is a poor welding technique. Either the weld puddle is too large (travel speed too slow) and/or the weld metal has been permitted to roll in front of the arc. Again, the arc must be kept on the leading edge of the puddle.