Describe the microstructure present in a 1050 steel after each step in the following heat treatments (briefly stating the assumptions and reasons): (a) heat at 820°C, quench to 650°C and hold for 90 s, and quench to 25°C; (b) heat at 820°C, quench to 450°C and hold for 90 s, and quench to 25°C; (c) heat at 820°C, quench to 720°C and hold for 100 s, and quench to 25°C; (d) heat at 820°C, quench to 720°C and hold for 100 s, quench to 400°C and hold for 500 s, and quench to 25°C; (e) heat at 820°C, quench to 720°C and hold for 100 s, quench to 400°C and hold for 10 s, and quench to 25°C; (f) heat at 820°C, quench to 25°C, heat to 500°C and hold for 103 s, and air cool to 25°C. (g) Do alloying elements shift the position of TTT curves? Which way and why? (h) Are CCT curves shifted with respect to TTT curves? Which way and Why?

Describe the microstructure present in a 1050 steel after each step in the following heat treatments (briefly stating the assumptions and reasons): (a) heat at 820°C, quench to 650°C and hold for 90 s, and quench to 25°C; (b) heat at 820°C, quench to 450°C and hold for 90 s, and quench to 25°C; (c) heat at 820°C, quench to 720°C and hold for 100 s, and quench to 25°C; (d) heat at 820°C, quench to 720°C and hold for 100 s, quench to 400°C and hold for 500 s, and quench to 25°C; (e) heat at 820°C, quench to 720°C and hold for 100 s, quench to 400°C and hold for 10 s, and quench to 25°C; (f) heat at 820°C, quench to 25°C, heat to 500°C and hold for 103 s, and air cool to 25°C. (g) Do alloying elements shift the position of TTT curves? Which way and why? (h) Are CCT curves shifted with respect to TTT curves? Which way and Why?

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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