a) Give the common name for the following phases – Q, y, Fe3C b) For a...

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a) Give the common name for the following phases – Q, y, Fe3C b) For a composition of 1 wt% C, calculate the amounts of proeu Composition (at% Ag) 0 20 40 60 80 100 2200 1200 A 2000 -Liquidus 1000 Liquid 1800 F Solidus a + L 1600 a 800 779°C (TE) B+L

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Answer 1

Answer #1

a) Common name for γ Iron is austenite, Fe3C is iron carbide and α Iron is ferrite

b) Amount of proeutectoid cementite for 1 wt% C = (C1 – 0.76) / (6.7 – 0.76) = (1-0.76)/(6.7-0.76) = 0.04 %

Amount of proeuctectoid pearlite for 1 wt% C = (6.7 - C1)/(6.7-0.76) = 1- 0.04 = 0.96%

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Answer 2

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