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In any condition, the effects of superheat cannot be considered in the process of chilled castings.

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in Casting-Forming-Welding I by (687k points)
In any condition, the effects of superheat cannot be considered in the process of chilled castings.

(a) True

(b) False

I had been asked this question by my school principal while I was bunking the class.

The question is from Solidification with Constant Surface Temperature in section Cooling and Solidification of Casting-Forming-Welding I

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Right answer is (b) False

To explain: In chilled castings, initially a mass of liquid metal at the melting temperature suddenly cools down to the surface temperature at zero time. The effect of superheat is not considered in chilled casting, but it would be quite possible to consider superheat in the one-dimensional case, but the results obtained may be unrealistic.

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