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Hot-quenching of eutectoid steels in austenitic condition results in formation of ___________

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Hot-quenching of eutectoid steels in austenitic condition results in formation of ___________

(a) Pearlite

(b) Bainite

(c) Ferrite

(d) Cementite

I have been asked this question in exam.

This intriguing question originated from Transformation Diagrams in chapter Heat Treatment of Engineering Material & Metallurgy

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Correct answer is (b) Bainite

The best explanation: If eutectoid steels in austenitic condition are hot-quenched in a 550^oC to 250^oC range, they are isothermally transformed into bainite. This bainite formed is an intermediate structure between pearlite and martensite.

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