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Microscopic examinations of the carbide free bainite structure
Author(s) -
Bojarski Z.,
Bołd T.
Publication year - 1973
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19730081108
Subject(s) - bainite , austenite , carbide , martensite , materials science , ferrite (magnet) , metallurgy , continuous cooling transformation , forging , microstructure , composite material
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.