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Microstructure Determination with the help of TTT diagram (a) Quenching: Austenitize at 850 °C for 30 min and quench to room temperature (b) Slow cooling: Austenitize at 850 °C for 30 min, hold at 550 °C for 10 min, and quench to room temperature Temperature (°C) 800 700 600 500 400 300 200 100 0 10-1 A Mistart) M(50%) M190%) (a) 1 M+A 10 -Eutectoid temperature P Pearlite Martensite 10² Time (s) 50% (b) 10³ 104 T 11 T T 1 1400 1200 1000 800 600 400 200 105 Cur Temperature (°F)

Microstructure Determination with the help of TTT diagram (a) Quenching: Austenitize at 850 °C for 30 min and quench to room temperature (b) Slow cooling: Austenitize at 850 °C for 30 min, hold at 550 °C for 10 min, and quench to room temperature Temperature (°C) 800 700 600 500 400 300 200 100 0 10-1 A Mistart) M(50%) M190%) (a) 1 M+A 10 -Eutectoid temperature P Pearlite Martensite 10² Time (s) 50% (b) 10³ 104 T 11 T T 1 1400 1200 1000 800 600 400 200 105 Cur Temperature (°F)

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Use the TTT diagram for O1 Tool steel provided above to estimate the amounts of
pearlite and martensite formed in the quenched heat-treated samples.

 

Microstructure Determination with the help of TTT diagram (a) Quenching: Austenitize at 850 °C for 30 min and quench to room temperature (b) Slow cooling: Austenitize at 850 °C for 30 min, hold at 550 °C for 10 min, and quench to room temperature Temperature (°C) 800 700 600 500 400 300 200 100 0 10-1 A Mistart) M(50%) M190%) (a) 1 M+A 10 -Eutectoid temperature P Pearlite Martensite 10² Time (s) 50% (b) 10³ 104 T 11 T T 1 1400 1200 1000 800 600 400 200 105 Cur Temperature (°F)
Transcribed Image Text:Microstructure Determination with the help of TTT diagram (a) Quenching: Austenitize at 850 °C for 30 min and quench to room temperature (b) Slow cooling: Austenitize at 850 °C for 30 min, hold at 550 °C for 10 min, and quench to room temperature Temperature (°C) 800 700 600 500 400 300 200 100 0 10-1 A Mistart) M(50%) M190%) (a) 1 M+A 10 -Eutectoid temperature P Pearlite Martensite 10² Time (s) 50% (b) 10³ 104 T 11 T T 1 1400 1200 1000 800 600 400 200 105 Cur Temperature (°F)
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