Briefly describe the simplest continuous cooling heat treatment procedure that would be used in converting a 4340

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Briefly describe the simplest continuous cooling heat treatment procedure that would be used in converting a 4340 steel from one microstructure to another.
(a) (Martensite + bainite) to (ferrite + pearlite)
(b) (Martensite + bainite) to spheroidite
(c) (Martensite + bainite) to (martensite + bainite + ferrite)
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Materials Science and Engineering An Introduction

ISBN: 978-0470419977

8th edition

Authors: William D. Callister Jr., David G. Rethwisch

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