en

hypereutectoid cementite

1

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Materjalitehnika terminibaas

ID 673355 Last modified 23.08.2026
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Domain materials sciencemetallographycasting
sekundaartsementiit preferred
sekundaarne tsementiit
eeleutektoidtsementiit
secondary cementite preferred
proeutectoid cementite
proeutectoid carbide
  • mikrokoostisosa, mis moodustub tsementiidi sadestumisel austeniidist üleeutektoidterastes nende jahutamisel allapoole temperatuuri A3 (vt tsementiit, vaba tsementiit, austeniit, perliit, üleeutektoidteras; vrd primaartsementiit, tertsiaartsementiit)
    Good to know
    • On tingitud süsiniku austeniidis lahustuvuse vähenemisest jahtumisel. Eeleutektoidtsementiit esineb rauasüsinikusulamite struktuuris struktuurselt vaba tsementiidina st tsementiidina mis ei ole perliidi koostises (vt austeniit, tsementiit, perliit, vaba tsementiit)
  • microconstituent formed by cementite precipitating from austenite in hypereutectoid steels upon their cooling below A3 (see: cementite, free cementite, austenite, pearlite, hypereutectoid steel; compare: primary cementite, tertiary cementite)
    Good to know
    • This is a result of decrease of the carbon solubility in austenite upon cooling. Proeutectoid cementite is a separate, structurally free constituent in iron-carbon alloys i.e. not in association with cementite in pearlite. (see: austenite, cementite, pearlite, free cementite)
sekundaartsementiit preferred
sekundaarne tsementiit
eeleutektoidtsementiit
eeleutektoidne tsementiit
secondary cementite preferred
proeutectoid cementite
proeutectoid carbide
hypereutectoid cementite deprecated

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