Cementite in ledeburite in Ni-Hard cast iron


Figure 1: Microstructure of Ni-Hard cast iron (Fe –3.3% C –0.9% Mn –0.9% Si –1.8% Cr –4.4% Ni –0.4% Mo) revealing massive cementite (C), ledeburite (arrows) and patches of plate martensite and retained austenite.Etched with aqueous 10% Na2S2O5. Original at 200x.


Figure 2: Microstructure of Ni-Hard cast iron (Fe –3.3% C –0.9%Mn–0.9%Si–1.8% Cr –4.4% Ni –0.4% Mo) revealing massive cementite (C), ledeburite (arrows) and patches of plate martensite and retained austenite. Etched with aqueous 10% Na2S2O5. Original at 500x. Some graphite (G) is also present.

Carbide name: Cementite, ledeburite
Record No.: 523
Carbide formula: Fe3C
Carbide type: m3C
Carbide composition in weight %: No data
Image type: LM
Steel name: Ni-Hard cast iron
Mat.No. (Wr.Nr.) designation: No data
DIN designation: No data
AISI/SAE/ASTM designation: No data
Other designation: No data
Steel group: Cast irons
Steel composition in weight %: No data
Heat treatment/condition: No data
Note: Ledeburite: The eutectic of the iron-carbon system, austenite and cementite. Upon further cooling, the austenite decomposes into the eutectoid, ferrite and cementite.
Links: No data
Reference: Not shown in this demo version.

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