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Perfect wetting only occurs when there is no contact resistance phenomenon in the casting interface.

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in Casting-Forming-Welding I by (687k points)
Perfect wetting only occurs when there is no contact resistance phenomenon in the casting interface.

(a) True

(b) False

The question was posed to me in quiz.

This interesting question is from Solidification with Predominant Interface Resistance topic in section Cooling and Solidification of Casting-Forming-Welding I

1 Answer

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Best answer
Correct choice is (a) True

Best explanation: The condition of no contact resistance exists only when the metal-mould contact is so close and tight that causes the occurrence of perfect wetting that is the casting gets soldered to the moulding surface. This causes the sticking problem and it becomes very difficult to extract casting from the mould cavity.

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