Question

(a) Cool rapidly to 350°C (660°F), hold for 103 s, then quench to room temperature. (b) Rapidly cool to 625°C (1160°F), hold for 10 s, then quench to room temperature. (f) Cool rapidly to 665°C (1230°F), hold for 103 s, then quench to room temperature. (g) Rapidly cool to 575°C (1065°F), hold for 20 s, rapidly cool to 350°C (660°F), hold for 100 s, then quench to room temperature.

Answer 1

(a) 100% bainite (b) 50% medium pearlite and 50% martensite (c) 50% fine pearlite, 25% bainite, and 25% martensite (d) 100% spheroidite (e) 100% tempered martensite (f) 100% coarse pearlite (g) 100% fine pearlite (h) 50% bainite and 50% martensite

Step-by-step explanation:

find attached image for clarity