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cementite

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
ce·ment·ite  (s-mntt)
n.
A hard brittle iron carbide, Fe3C, found in steel with more than 0.85 percent carbon.

[From cement.]

cementite [sɪˈmɛntaɪt]
n
(Chemistry / Elements & Compounds) the hard brittle compound of iron and carbon that forms in carbon steels and some cast irons. Formula: Fe3C
ThesaurusLegend:  Synonyms Related Words Antonyms
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


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? Mentioned in ? References in periodicals archive
 
In high-temperature annealing, a casting is heated above the critical range to a temperature (1,650-1,750F/900-950C) at which both primary carbides and free cementite decompose to ferrite and graphite.
In the absence of enough Mn, S has a marked stabilizing action on the cementite and promotes carbides (chill).
In addition, the ferrite effect suppresses cementite formation and inhibits chills;
 
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