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Related to cementite: austenite, martensite


A hard brittle iron carbide, Fe3C, found in steel with more than 0.85 percent carbon.

[From cement.]


(Elements & Compounds) the hard brittle compound of iron and carbon that forms in carbon steels and some cast irons. Formula: Fe3C


(sɪˈmɛn taɪt)

an iron carbide, Fe3C, a constituent of steel and cast iron, sometimes with part of its iron replaced by another metal, as manganese.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cementite - a chemical compound that is a constituent of steel and cast iron; very hard and brittle
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
pearlite - a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a constituent of steel and cast iron
References in periodicals archive ?
Damascus saber blades contained carbon nanotubes and cementite nanowires--an ultra-high carbon steel formulation that gave them strength, resilience, the ability to hold a keen edge, and a visible moire pattern in the steel that give the blades their name.
Pearlite forms after eutectoid point when single phase austenite splits into two phases, cementite and ferrite.
However, annealed SCM420 has a ferrite and spheroidized cementite microstructure.
It is thought that this increase is due to thermal effect accompanied with the softening mechanism by formation of soft microstructural constituent (decomposition of cementite leads to more ferrite formation) during service time of the tube at these temperatures.
In both cases, the ferrite grain edges featured inclusions of cementite Fe3[C.
In area of the edge workpiece the structure is formed by ferritic matrix with cementite and ferrite grains rare (Table 3 - Fig.
SEM images indicate that after two passes the pearlite is severely distorted due to the imposition of a very high deformation; this is probably because in severe plastic deformation processes the high deformation imposed causes a substantial proportion of pearlitic cementite to be dissolved at room temperature (Hong et al.
Quench Embrittlement: Intergranular Fracture Due to Cementite and Phosphorus in Quenched Carbon and Alloy".
During the heating of steel with spherodized cementite in ferrite matrix, the austenite phase nucleates at the ferrite-cementite boundary.
Among specific topics are the thermodynamics of phase transformations in steels, kinetics, proeutectoid ferrite and cementite transformations in steels, carbide-free bainite in steels, and nucleation and growth during the austenite-to-ferrite phase transformation in steels after plastic deformation.