The temperature range during the heating of a ferrous alloy in which ___________________ forms is known as the transformation range?
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Answer: B. Austenite
Explanation
The transformation range during heating is the temperature interval where austenite forms. Ferrite and pearlite transform completely into austenite within this specific critical temperature span. Heat treaters must heat ferrous alloys above this transformation range for successful hardening. Iron carbon phase diagrams map out the exact transformation temperature boundaries for steels. Austenite is the face centered cubic solid solution of carbon in iron stable at high temperatures. Microstructural control during heat treatment depends entirely on phase transformation kinetics.
Blacksmiths and metallurgical engineers monitor transformation ranges during steel quenching operations. Heat treatment furnaces require precise temperature control to ensure uniform austenite formation. Mechanical property enhancement relies on transforming austenite into various desired microstructures. Cementite is an iron carbide compound present in steels rather than a high temperature phase. Martensite forms upon rapid quenching from the austenitic region rather than during heating. Pearlite is a layered microstructure of ferrite and cementite that transforms into austenite.
- Subject
- Engineering
- Category
- Chemical Engineering
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- —
- Difficulty
- medium
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