A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels

Journal article (2017)

Authors

F. Hajy Akbary Material Innovation Institute (M2i), (OLD) MSE-3
J. Sietsma (OLD) MSE-3
R.H. Petrov Universiteit Gent, (OLD) MSE-3
G. Miyamoto Tohoku University
Tadashi Furuhara Tohoku University
Research Group
(OLD) MSE-3
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Published Date

2017

Language

English

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Research Group

(OLD) MSE-3

Abstract

Quenching and partitioning (Q&P) process of a 0.3C-1.3Si-3.2Mn (wt%) steel with Mn segregation is studied experimentally and theoretically. During initial quenching a higher fraction of martensite forms in Mn-poor regions compared to Mn-rich regions. In the partitioning process, austenite in Mn-poor regions is surrounded with a higher fraction of martensite than austenite in Mn-rich regions and therefore receives a larger amount of carbon. When carbon partitioning is not sufficient to stabilize austenite, a higher fraction of martensite forms, during final quenching, in Mn-poor regions. Lowering the quenching temperature in the Q&P process reduces inhomogeneity in the distribution of phases.

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