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The surface finish obtained by cold working is better than that achieved by the hot working of material.

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in Casting-Forming-Welding II by (119k points)
The surface finish obtained by cold working is better than that achieved by the hot working of material.

(a) True

(b) False

This question was addressed to me in final exam.

The query is from Advantage and Disadvantage of Hot and Cold Forming topic in section Types of Die & Metal Forming Processes of Casting-Forming-Welding II

1 Answer

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by (701k points)
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Best answer
Correct choice is (a) True

To elaborate: In the hot working of metals, rapid oxidation or scale formation and surface de-carburization processes occur on the surface of metal due to the presence of high temperature. This results in a poor surface finish of the metal and the metal loss too. But in cold working, the temperature is kept moderate which maintains the better surface finish of the metal.

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