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Metallurgical and Materials Transactions A
Published in: Metallurgical and Materials Transactions A 12/2022

13-10-2022 | Original Research Article

Understanding Partitioning and Segregation of Boron in Continuously Cast Slabs of 27MnB5 Steel

Authors: Jun Wang, Shenbao Jin, Qiangjun Yan, Lihua Liu, Gang Sha

Published in: Metallurgical and Materials Transactions A | Issue 12/2022

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Abstract

Trace addition of boron at approximate 40 ppm can have a significant effect on strength of steels. This research addresses B distribution in a continuously cast slab of 27MnB5 steel using nanoscale secondary ion mass spectrometry and atom probe tomography, to understand the segregation and partitioning of boron in main microstructural features of the steel. Unlike quenched plates, the slab develops boron enrichment in Ti(CN) precipitates, some cementite particles, or primary-austenite grain boundaries (PAGBs) depending on local cooling rate. The high-temperature Ti(CN) precipitates with partitioning of B implies that the precipitates should be taken into account for effective B addition in the steel. Partitioning of B atoms into cementite on/near the PAGBs in proeutectoid ferrite under slow cooling is responsible for desegregation of B at the PAGBs.
previous article On the Thermodynamics and Phase Transformation Pathways in BCC-B2 Refractory Compositionally Complex Superalloys
next article Structure Optimization of Die for 6000-Series Aluminum Alloy Extrusion from Numerical Analysis, Stress Measurement, and Microstructure Observation Perspective

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Appendix
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Metadata
Title
Understanding Partitioning and Segregation of Boron in Continuously Cast Slabs of 27MnB5 Steel
Authors
Jun Wang
Shenbao Jin
Qiangjun Yan
Lihua Liu
Gang Sha
Publication date
13-10-2022
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 12/2022
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-022-06845-5

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