A zinc-aluminum eutectoid galvanized steel has been developed.
It is further characterized by having a double-two-phase structure comprising a pro-eutectoid L12 phase and an (L12+D022) eutectoid structure.
The proportion of the lamellar eutectoid phase is 10-70% by area.
Sub-critical annealing (or sub-critical treatment) is annealing carried out slightly below the eutectoid temperature (Ac1 point = eutectoid transformation (723°C for carbon-steels)).
The cooling treatment is stopped when the temperature at the eutectoid line of the iron-carbon diagram is reached.
Graphitization is a change in solid phase at high temperature.
The microstructure of the carbon steel after annealing: the hypoeutectic cast steel is ferrite and pearlite, the eutectoid cast steel is pearlite, and the hypereutectoid cast steel is pearlite and carbide.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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