point de transformation
- Domaine
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- métallurgie traitement des métaux
- Date
Définition :
Température à laquelle se produit un changement de phase.
Terme :
- point de transformation n. m.
Traductions
-
anglais
Date :Définition
Temperature, or combination of temperature and pressure, at which transformation occurs, the composition remaining constant.
Note :
Among the distinctive critical points in the iron-carbon system occur the following. A1 transformation between austenite and ferrite + cementite at the eutectoid point, A2 magnetic transformation, A3 transformation between austenite and ferrite in hypoeutectoid steel, A4 transformation between austenite and ferrite at a high temperature, ferrite being the phase formed on raising of the temperature, A cm transformation between austenite and cementite in hypereutectoid steel. If more than one transformation takes place at a certain temperature, this can be denoted as in the paradigm A13.
Terme :
- critical point