The influence of silicon on the iron-carbon system

Legend (Phases):

1. Liquid
2. Liquid-Graphite
3. Liquid-FCC_A1
4. Graphite-FCC_A1
5. FCC_A1
6. BCC_A2-FCC_A1
7. FCC_A1-BCC_A2-Graphite
8. BCC_A2-Graphite
9. Liquid-BCC_A2
10. BCC_A2
11. Liquid-BCC_A2-FCC_A1

Ideas

• The silicon content is indirectly proportional with the austenitic phase.
• This element has a big effect on the important points of this diagrams, like peritectic, eutectic point, etc.
• The liquid-graphite´s phase (region 2) is grows up at the same time that the silicon content is bigger.
• The Silicon helps to grow up alfa phase.

Profile critical points

The next table and graphic show the temperature and composition variation with Silicon content in the system.

Critical Points