Reading Assignment
- 4.4 Iron-Carbon Equilibrium Phase Diagrams
- 4.5 Steels and the simplified Iron-Carbon Diagram
- 4.6 Cast Irons
Recommended Reading:
- Study Guide – Iron Carboy System
- Supplementary Video Lecture (Modern Steel Pducts)
- The Entire Story of Steel
- Ferrous Metals: Steel and Cast Iron
- Video: Bethlehem Steel, PBS
- Article: Why don’t magnets work on some stainless steels
Outline
The Iron-Carbon Phase Diagram
Eutectoid point
What is liquid, what is solid
Major Iron Forms
Ferrite or alpha iron (BCC)
Austenite or gamma iron (FCC)
Cementite, or iron carbide, or Fe3C
Delta ferrite, or delta Iron (BCC)
Cast Iron Vs. Steel
Equilibrium Cooling
Peralite
Hypoeutectoid Alloys
Proeutectoid alpha
Hypereutectoid Alloys
Proeutectoid cementite
Effects of Alloying elements
Titanium
Molybdenum
Nickel
Chromium
Non-Equilibrium Cooling
Time-Temperature Transformation Diagrams (T-T-T)
Coarse Pearlite
Fine Pearlite
Bainite
Martensite
Additional Information
Video – Prof. Scott Ramsay solves an Fe-C phase diagram question from the December 2010 MSE101 final exam.
Link – University of Cambridge. Martensite and Martensitic Phase Tranformations
