University of Oulu

Laukka, A. , Heikkinen, E. and Fabritius, T. (2019), In‐Depth Oxide Scale Growth Analysis of B and Ti Microalloyed AISI 304 in Oxygen‐Containing Furnace Atmospheres and CH4 Burn‐Simulating Furnace Atmospheres. steel research int., 90: 1800447. doi:10.1002/srin.201800447

In‐depth oxide scale growth analysis of B and Ti microalloyed AISI 304 in oxygen‐containing furnace atmospheres and CH₄ burn‐simulating furnace atmospheres

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Author: Laukka, Aleksi1; Heikkinen, Eetu-Pekka1; Fabritius, Timo1
Organizations: 1Process Metallurgy Research Group, University of Oulu
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019040911571
Language: English
Published: John Wiley & Sons, 2019
Publish Date: 2019-11-30
Description:

Abstract

The effects of boron and titanium microalloying on scale‐layer formation and structure on AISI 304 austenitic stainless steel are studied. The research is focused on a steel slab ’s oxide scale formation in a reheat furnace prior to hot rolling. The studied boron microalloying amounts are 7, 35, and 55 ppm and the studied titanium microalloying amounts are <100 and 400 ppm. In‐depth temperature and atmosphere tests span from 1100 to 1300 °C for an O₂‐containing atmosphere and 1100 to 1250 °C in an H₂O‐containing atmosphere, both using 25 °C increments. Research shows that microalloying 55 ppm B reduces scale growth at above 1175 °C in an H₂O atmosphere, all microalloying elements show significant scale growth reduction at 1175 °C in an O₂ atmosphere, microalloying 35 and 55 ppm B increases scale growth amounts at above 1225 °C in an O₂ atmosphere, while microalloying 400 ppm Ti reduced it. The inhibiting effect on scale growth that results from boron microalloying is tied to silicon oxide infiltration of the steel substrate.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 90
Issue: 1
Article number: 1800447
DOI: 10.1002/srin.201800447
OADOI: https://oadoi.org/10.1002/srin.201800447
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Funding: The author wishes to extend gratitude to the Steel and Metal Producers’ Fund of the Technology Industries of Finland Centennial Foundation for the grant used to make this research.
Copyright information: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Laukka, A. , Heikkinen, E. and Fabritius, T. (2019), In‐Depth Oxide Scale Growth Analysis of B and Ti Microalloyed AISI 304 in Oxygen‐Containing Furnace Atmospheres and CH4 Burn‐Simulating Furnace Atmospheres. steel research int., 90: 1800447, which has been published in final form at https://doi.org/10.1002/srin.201800447. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.