1 / 9

The Iron-Iron Carbide Phase Diagram

The Iron-Iron Carbide Phase Diagram. Heat Treatment of Steel. Features. Phases present. L. a ferrite Bcc structure Ferromagnetic Fairly ductile. d Bcc structure Paramagnetic. g austenite Fcc structure Non-magnetic ductile. Fe 3 C cementite Orthorhombic Hard brittle. Reactions.

macey-eaton
Download Presentation

The Iron-Iron Carbide Phase Diagram

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Iron-Iron Carbide Phase Diagram Heat Treatment of Steel

  2. Features Phases present L a ferrite Bcc structure Ferromagnetic Fairly ductile d Bcc structure Paramagnetic g austenite Fcc structure Non-magnetic ductile Fe3C cementite Orthorhombic Hard brittle Reactions Peritectic L + d = g Max. solubility of C in ferrite=0.022% Max. solubility of C in austenite=2.11% Eutectic L = g + Fe3C Eutectoid g = a + Fe3C

  3. Microstructures a g

  4. Steels Steel is an interstitial solid solution of carbon in iron. Theoretically steel has a maximum of 2.11% carbon. In practice, the amount of carbon rarely exceeds 0.8% Classification/Nomenclature Low carbon steels up to 0.2%C Medium carbon steels 0.2-0.4%C High carbon steels >0.4% C AISI 1020: Last two numbers indicate Amount of carbon :0.2%C 10 indicates plain carbon steel AISI 4340: 0.4%C 43 indicates alloy steel

  5. Microstructural changes in steel on cooling for different compositions

  6. Eutectoid steel

  7. Hypoeutectoid steel

  8. Hypereutectoid steel

More Related