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Flame hardening involves

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in Machine Design by (89.5k points)
Flame hardening involves

(a) Heating the surface above the trAnswerformation range

(b) Quenching after heating

(c) Minimum case depth is 1mm

(d) All of the mentioned

I faced this question in a quiz.

This question relates to the Heat Treatment & Case Hardening of Steels in lesson Engineering Materials of Machine Design

1 Answer

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by (52.6k points)
The most accurate answer is (d) All of the mentioned

For a clear picture: Flame Hardening is a process of heating the surface with a flame above critical temperature and then quenching it.

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