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Which iron is formed when the melt is frozen?(a) Alpha(b) Beta(c) Gamma(d) DeltaThis question was addressed to me by my college professor while I was bunking the class.I want to ask this question from Cooling Curve for Pure Iron in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II

Answer»

The correct choice is (d) DELTA

The EXPLANATION: Alpha irons, beta irons or gamma irons cannot be FORMED when the metal is in the frozen FORM. When the molten metal is frozen, delta iron is formed.



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