Fe-Fe3C Phase Diagram (Intro-Easy)

Melting point of iron in degree centigrade is equal to

• 768

• 1535

• 1410

• 910

Iron carbon phase diagram is

• Unary phase

• Binary phase

• Tertiary phase

• None of the mentioned

Peritectic reaction in iron carbon diagram takes place at temperature (in degree centigrade) is

• 1539

• 1493

• 910

• 1175

Percentage of carbon at a eutectic point is equal to

• 2.1

• 4.3

• 0.83

• 0.02

What is pearlite?

• layered structure composed of alternating layers of ferrite and cementite

• eutectic mixture of austenite and cementite.

• layered structure composed of alternating layers of austenite and cementite

• ferrite and cementite

What is leduburite?

• layered structure composed of alternating layers of ferrite and cementite

• eutectic mixture of austenite and cementite.

• layered structure composed of alternating layers of austenite and cementite

• ferrite and cementite

What are the phases at point A

• α ferrite +γ austenite+ Fe₃C

• γ austenite + Fe₃C

• α ferrite + Fe₃C

• γ austenite + Fe₃C

What are the phases at point B

• α ferrite +γ austenite+ Fe₃C

• γ austenite + Fe₃C

• α ferrite + Fe₃C

• γ austenite + Fe₃C

What are the microstructures at point B cooling down from 1200C

• pearlite+ferrite

• pearlite + cementite

• austenite+cementite

• cementite+ leduburite

What are the microstructures at point A cooling down from 1400C

• pearlite+ferrite

• pearlite + cementite+leduburite

• austenite+cementite+leduburite

• cementite+ leduburite