Which could never be an answer when a heat treatment ends at room temperature? a. 50% Austenite 25% Pearlite 25% Bainite b. Spheroidite c. 100% Tempered Martensite d. 50 % Pearlite 50% Martensite
Question
Which could never be an answer when a heat treatment ends at room temperature? a. 50% Austenite 25% Pearlite 25% Bainite b. Spheroidite c. 100% Tempered Martensite d. 50 % Pearlite 50% Martensite
Solution
The answer is a. 50% Austenite 25% Pearlite 25% Bainite. This is because Austenite is a high-temperature phase of iron. It cannot exist at room temperature. The other phases (Pearlite, Bainite, Spheroidite, and Tempered Martensite) can all exist at room temperature.
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