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The impurities in true centrifugal casting
- a)get collected at outer surface
- b)mix up thoroughly throughout
- c)get collected at the inner surface
- d)get collected in the middle portion in between inner and outer surface
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The impurities in true centrifugal castinga)get collected at outer sur...
Since impurities are lighter than the metal hence they get collected at the inner surface of the casting.
Most Upvoted Answer
The impurities in true centrifugal castinga)get collected at outer sur...
The impurities in true centrifugal casting get collected in the middle portion in between the inner and outer surface. This is because of the unique nature of the centrifugal casting process, which involves the use of centrifugal force to distribute the molten metal and impurities.
Explanation:
1. The Centrifugal Casting Process:
- Centrifugal casting is a casting process that uses the principle of centrifugal force to distribute the molten metal and impurities.
- In this process, a mold is rotated at high speeds while the molten metal is poured into it.
- The centrifugal force generated by the rotation of the mold pushes the molten metal towards the outer surface of the mold, while the impurities tend to move towards the inner surface.
2. Movement of Impurities:
- As the molten metal is poured into the rotating mold, the centrifugal force acts on it, causing it to move towards the outer surface of the mold.
- At the same time, the impurities present in the molten metal also experience the centrifugal force and tend to move towards the inner surface.
- However, due to their higher density compared to the molten metal, the impurities are not able to move as easily as the molten metal.
- As a result, the impurities get trapped in the middle portion of the casting, which is in between the inner and outer surface.
3. Collection of Impurities:
- The impurities that get collected in the middle portion of the casting are typically in the form of slag, oxides, or other non-metallic contaminants.
- These impurities are undesirable in the final casting as they can weaken the material and affect its mechanical properties.
- To minimize the presence of impurities, various techniques can be used, such as the use of proper gating systems, filtering the molten metal, and controlling the pouring temperature.
In conclusion, in true centrifugal casting, the impurities get collected in the middle portion in between the inner and outer surface. This is due to the movement of the molten metal towards the outer surface under the influence of centrifugal force, while the impurities, being denser, tend to remain in the middle portion. Proper control and techniques can be employed to minimize the impurities and ensure a high-quality casting.
Explanation:
1. The Centrifugal Casting Process:
- Centrifugal casting is a casting process that uses the principle of centrifugal force to distribute the molten metal and impurities.
- In this process, a mold is rotated at high speeds while the molten metal is poured into it.
- The centrifugal force generated by the rotation of the mold pushes the molten metal towards the outer surface of the mold, while the impurities tend to move towards the inner surface.
2. Movement of Impurities:
- As the molten metal is poured into the rotating mold, the centrifugal force acts on it, causing it to move towards the outer surface of the mold.
- At the same time, the impurities present in the molten metal also experience the centrifugal force and tend to move towards the inner surface.
- However, due to their higher density compared to the molten metal, the impurities are not able to move as easily as the molten metal.
- As a result, the impurities get trapped in the middle portion of the casting, which is in between the inner and outer surface.
3. Collection of Impurities:
- The impurities that get collected in the middle portion of the casting are typically in the form of slag, oxides, or other non-metallic contaminants.
- These impurities are undesirable in the final casting as they can weaken the material and affect its mechanical properties.
- To minimize the presence of impurities, various techniques can be used, such as the use of proper gating systems, filtering the molten metal, and controlling the pouring temperature.
In conclusion, in true centrifugal casting, the impurities get collected in the middle portion in between the inner and outer surface. This is due to the movement of the molten metal towards the outer surface under the influence of centrifugal force, while the impurities, being denser, tend to remain in the middle portion. Proper control and techniques can be employed to minimize the impurities and ensure a high-quality casting.
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