University of Oulu

Laukka, A., Heikkinen, E.‐P., Puukko, E. and Fabritius, T. (2017), The Effect of Boron and Titanium Microalloying on the Scale Formation of AISI 304 Austenitic Stainless Steel in Simulated Walking Beam Furnace Conditions. steel research int, 88: 1600365. doi:10.1002/srin.201600365

The effect of boron and titanium microalloying on the scale formation of AISI 304 austenitic stainless steel in simulated walking beam furnace conditions

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Author: Laukka, Aleksi1; Heikkinen, Eetu‐Pekka1; Puukko, Esa2;
Organizations: 1Process Metallurgy Research Group, University of Oulu, Pentti Kaiteran katu 1, 90014, Oulu, Finland
2Research Centre, Outokumpu Stainless PLC, Terästie, 95400, Tornio, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 3.5 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202001162370
Language: English
Published: John Wiley & Sons, 2017
Publish Date: 2020-01-16
Description:

Abstract

The effect of microalloying boron and titanium on AISI 304 austenitic stainless steel scale formation is studied. Thermogravimetric tests simulating walking beam furnace conditions are performed at temperatures of 800, 1100, and 1300 °C for 3 h on samples of AISI 304 steels with different alloying amounts of B and Ti. Scaling at 800 °C is negligible on all the samples, while scaling is clear at 1100 and 1300 °C. The thermogravimetric results show that even in small amounts, boron and titanium have an effect on scale growth rate. FESEM microscopy and accompanying EDS analyses are used to study oxidation area element composition. The FESEM images are also used to compare the oxidation zones’ area fractions of metal, pores, and oxide between different alloying amounts for the samples of 1300 °C tests. Calculations for scale formation activation energy are done based on the thermogravimetric data. The steel sample with the lowest alloying of boron and titanium shows a noticeably different growth rate, which is nearly linear in both the 1100 and 1300 °C tests. Differences between alloying amounts in accumulated scale during the 180 min period in kg m−2 are greater at 1100 °C than they are at 1300 °C.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 88
Issue: 6
Article number: e201600365
DOI: 10.1002/srin.201600365
OADOI: https://oadoi.org/10.1002/srin.201600365
Type of Publication: A1 Journal article – refereed
Field of Science: 222 Other engineering and technologies
216 Materials engineering
Subjects:
Funding: This research has been conducted within the FIMECC SIMP, a research program coordinated by the Finnish Metals and Engineering Competence Cluster (FIMECC). Outokumpu Stainless is acknowledged for funding and for their committed collaboration. In particular the authors would like to thank the Research Centre of Outokumpu Tornio for manufacturing the samples and the laboratory staff of the process metallurgy research group at the University of Oulu for practical guidance on sample handling.
Copyright information: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Laukka, A., Heikkinen, E.‐P., Puukko, E. and Fabritius, T. (2017), The Effect of Boron and Titanium Microalloying on the Scale Formation of AISI 304 Austenitic Stainless Steel in Simulated Walking Beam Furnace Conditions. steel research int, 88: 1600365, which has been published in final form at http://dx.doi.org/10.1002/srin.201600365. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.