et

tertsiaartsementiit

1

Terminological databases

Materjalitehnika terminibaas

ID 676248 Last modified 31.08.2025
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Domain materials sciencemetallography
tertiary cementite preferred
  • tsementiit, mis moodustub terapiiridel feriidist väga väikese süsinikusisaldusega teraste (alla 0,05 % C) aeglasel jahtumisel temperatuuridel alla A1 (727 oC) (vt tsementiit, vabatsementiit, ferriit; vrd primaartsementiit, sekundaartsementiit)
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    • Tertsiaartsementiidi eraldumist põhjustab jahtumisega kaasnev süsiniku lahustuvuse vähenemine ferriidis.
  • cementite precipitated from ferrite in low-carbon (below 0.05 wt% C) steels along ferrite grain boundaries upon slow cooling from temperatures lower than A1 (below 727 oC) (see: cementite, free cementite, ferrite; compare: primary cementite, secondary cementite/proeutectoid cementite)
    Good to know
    • This is a result of a decrease of the carbon sulubility in ferrite upon cooling.
tertsiaartsementiit preferred
tertiary cementite preferred

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