Fe - Fe3C Eutectoidic Diagram

Tammy Olushina
Mind Map by Tammy Olushina, updated more than 1 year ago
Tammy Olushina
Created by Tammy Olushina over 4 years ago
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Description

Steel contains <2.1% of carbon. A small percentage of carbon completely changes the structure and mechanical properties of the iron it diffuses through.

Resource summary

Fe - Fe3C Eutectoidic Diagram

Annotations:

  • Steel contains &lt;2.1% carbon. Different carbon percentages completely change the structure and mechanical properties of iron.
  1. Austenite (YFe)

    Annotations:

    • Heat YFe to temperature &lt;750'C, and keep there long enough for solid mix to be homogeneous, to produce Austenite.
    1. Rapid cooling produces Martensite

      Annotations:

      • High Hardness, Too brittle to use
      1. Reheat for a few hours to Tempered Martensite
      2. Moderate cooling produces Bainite
        1. Slow cooling produces Pearlite

          Annotations:

          • Made up of cementite and ferrite mix
          1. Spheroidite

            Annotations:

            • Reheat Bainite or Pearlite to 700'C and keep at this constant temperature for 24hrs.
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