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A 0 4 wt C steel is austenitised at 900 C...

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Physical Metallurgy
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A 0.4 wt% C steel is austenitised at 900°C for 1 hour and heat treated to get different. inicrostructures. Match the following microstructures to the heat treatments.
P. Martensite + Retained austenite 1. Annealing
Q. Ferrite + fine pearlite 2. Quenching
R. Ferrite + spheroidal cementite 3. Quenching + temperature at 600°C
S. Ferrite + coarse pearlite 4. Normalising

Answer & Solution
Correct Answer: Option D
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A 0.4 wt% C steel is austenitised at 900°C for 1 hour and heat treated to get different. inicrostructures. Match the following microstructures to the heat treatments.
P. Martensite + Retained austenite 1. Annealing
Q. Ferrite + fine pearlite 2. Quenching
R. Ferrite + spheroidal cementite 3. Quenching + temperature at 600°C
S. Ferrite + coarse pearlite 4. Normalising
A. P-4, Q-3, R-2, S-1 B. P-1, Q-2, R-3, S-4 C. P-2, Q-4, R-1, S-3 D. P-2, Q-4, R-3, S-1
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