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Microscopic examinations of the carbide free bainite structure

✍ Scribed by Prof. Dr. Z. Bojarski; Dr. T. Bołd

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
647 KB
Volume
8
Category
Article
ISSN
0232-1300

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Phase transformations have been investigated occurring in the 0,18 C – 0,5 Mn – 2,4 Cr – 1,4 Ni – 0,4 Mo – 0,003% B steel during continuous cooling at rates corresponding to the cooling down of forgings of ø 100, 500 and 1000 mm in air. Two methods were used: an X‐ray method and electron microscopy.

The existence of a particular kind of carbide‐freebainite has been found in which composition occur irregular ferrite and martensite‐austenite islands. This bainite appears in the steel which has been investigated after cooling from the austenitizing temperature with rates of 0,7 to 35°C/min. The mechanism of the transformation of austenite to carbide‐free bainite has been established.

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