LaserHardening_PhaseDiagram.jpg (420 × 380 pixels, file size: 79 KB, MIME type: image/jpeg)
Steel phase diagram
Iron-carbon phase diagram under atmospheric pressure
This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are:
- α iron: ferrite, ferritic steel
- γ iron: austenite, austenitic steel
- iron carbide: cementite, Fe3C.
We can see a eutectic and a eutectoid; these phases crystallise as a stacking of fine strips of pure phases (iron and cementite) in case of the eutectoid, or a pure iron containing small balls of cementite for the eutectic. Although it is heterogeneous, these phases behave like homogeneous pure bodies.
Steel is between 0 and 2.06 mass percent of carbon. Cast iron is between 2.06 and 6.67%.
Note that this diagram is for illustrative purposes only, and is not thermodynamically accurate.
SVG Author: User:User A1
Original Author: Christophe Dang Ngoc Chan
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:26, 18 November 2008 | | 420 × 380 (79 KB) | P.Sinclair (talk | contribs) | Steel phase diagram Iron-carbon phase diagram under atmospheric pressure This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are: * α iron: ferrite, ferritic steel * γ iron: austenite, austeniti |
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