Temperatura(°C) 800 700 600- A 500 400 300 A Minic 200 M50% M+A M190%) 100 ° 10-1 P 800 800 Temperatura eutetoide Temperatura eutetide Temperatura eutetide 700 700 B Temperatura(°C) 600 500 400 300 Monico) 200 M+A M(50%) M(90%) 100 B (Dengeda 600 500 400 A 300 Minicio) 200 M+A M1509) M190%) 100 B 1 10 102 103 104 105 ° Tempo(s) 10-1 1 10 102 10 104 105 Tempo(s) ° 10-1 1 A 10 102 Tempo(s) 103 104 105 B C
Heat treatments of steels are highly significant processes in Engineering, as they allow for the alteration of
Consider the curves of the TTT (Time-Temperature-Transformation) diagrams for a eutectoid steel (0.76% C) below and select the correct option:
1. Diagram A indicates the formation of spheroidized cementite.
Diagram B indicates that austempering was performed.
Diagram C indicates the formation of tempered martensite.
2. Diagram A indicates the formation of fine pearlite.
Diagram B indicates that tempering was performed.
Diagram C indicates the formation of martensite.
3.Diagram A indicates quenching and tempering.
Diagram B indicates that a fine pearlite microstructure was formed.
Diagram C indicates annealing.
4.Diagram A indicates that quenching was performed.
Diagram B indicates the formation of a bainite microstructure.
Diagram C indicates that annealing was performed.
5.Diagram A indicates the formation of martensite.
Diagram B indicates that normalizing was performed.
Diagram C indicates the formation of coarse pearlite.
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