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Too low welding current in arc welding would result in
- a)Excessive piling up of weld metal, poor penetration, wasted electrodes
- b)Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
- c)Too small bead, weak weld, and wasted electrodes
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
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Too low welding current in arc welding would result ina)Excessive pil...
Electrode wire size, welding voltage, current and speed are the four most important welding variables apart from flux.
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Welding current is the most influential variable as it controls electrode melting rate, depth of penetration and the amount of base metal fused. However, very high current shall lead to too much penetration resulting in burn through in the metal being joined, excessive reinforcement and increased weld shrinkage and, therefore, a large amount of distortion. On the other hand, low current shall lead to insufficient penetration, lack of fusion and unstable arc.
If the welding speed is increased, power or heat input per unit length of the weld is decreased, less welding material is applied per unit length of the weld, and consequently less weld reinforcement results and penetration decreases. Travel speed is used primarily to control bead size and penetration. It is interdependent with the current.
Excessive high travel speed decreases wetting action, increases the tendency for undercut, arc blow, porosity and uneven bead shapes while slower travel speed reduces the tendency to porosity and slag inclusion.
- Too low welding current in arc welding would result in excessive piling up of weld metal
- Too high welding current in arc welding would result in excessive spatter
- Too fast welding speed in arc welding would result in the too small bead
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Too low welding current in arc welding would result ina)Excessive pil...
Explanation:
Arc welding is a process that uses an electric arc to join metal parts. The welding current is one of the key parameters in the arc welding process. If the welding current is too low, it can cause several problems, including:
Excessive piling up of weld metal: When the welding current is too low, the weld pool may not be hot enough to melt the base metal properly. This can result in the deposition of excess weld metal, which can cause problems like poor penetration, lack of fusion, and porosity.
Poor penetration: Low welding current can cause poor penetration because the weld pool may not be hot enough to melt the base metal properly. This can result in a weak weld joint that is susceptible to failure.
Wasted electrodes: Low welding current can cause excessive electrode consumption because the electrode may not be able to maintain a stable arc. This can result in frequent electrode changes, which can increase the cost of the welding process.
Therefore, it is important to maintain the correct welding current to ensure a high-quality weld joint.
Arc welding is a process that uses an electric arc to join metal parts. The welding current is one of the key parameters in the arc welding process. If the welding current is too low, it can cause several problems, including:
Excessive piling up of weld metal: When the welding current is too low, the weld pool may not be hot enough to melt the base metal properly. This can result in the deposition of excess weld metal, which can cause problems like poor penetration, lack of fusion, and porosity.
Poor penetration: Low welding current can cause poor penetration because the weld pool may not be hot enough to melt the base metal properly. This can result in a weak weld joint that is susceptible to failure.
Wasted electrodes: Low welding current can cause excessive electrode consumption because the electrode may not be able to maintain a stable arc. This can result in frequent electrode changes, which can increase the cost of the welding process.
Therefore, it is important to maintain the correct welding current to ensure a high-quality weld joint.
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Too low welding current in arc welding would result ina)Excessive piling up of weld metal, poor penetration, wasted electrodesb)Excessive spatter, under cutting along edges, irregular deposits, wasted electrodesc)Too small bead, weak weld, and wasted electrodesd)None of the aboveCorrect answer is option 'A'. Can you explain this answer?
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