Page 376 - Materials Science and Engineering An Introduction

Development of microstructure (pearlite and a proeutectoid Development of other microstructures 10) (Chapter

Structure 9) (Chapter

phase)

6.70

Cementite (Fe 3 C) 6 5

+ Fe 3 C 4 Composition (wt% C)
L
Iron–Carbon Alloys (Steels) Iron–iron carbide phase (Chapter + L , Austenite + Fe 3 C , Ferrite 3 2 1
diagram
9)

a (0.022 wt% C) 1600 1400 1200 1000 Temperature ( C) 800 + 600 400 0 (Fe)

Processing cooling m heating Fe 3 C(6.7 wt% C) Eutectoid reaction (Chapter 9) Metastable vs. equilibrium states (Chapter 9) vs.

g (0.76 wt% C) +

0
equilibria (Chapter 9) Solid (Ice) Temperature (°C)
Phase 220

1,000 100 10 1.0 Pressure (atm) 0.1 0.01 0.001

348 •