University of Oulu

Kodukula, S., Kokkomäki, H., Puukko, E., Porter, D. and Kömi, J. (2021), Influence of Hot Rolling Finishing Temperature on Texture and Ridging Resistance in Stabilized Ferritic Stainless Steels. steel research int., 92: 2000695. https://doi.org/10.1002/srin.202000695

Influence of hot rolling finishing temperature on texture and ridging resistance in stabilized ferritic stainless steels

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Author: Kodukula, Suresh1; Kokkomäki, Heikki1; Puukko, Esa1;
Organizations: 1Tornio Research Center, Outokumpu Stainless Oy, Terästie 1, Tornio 95490, Finland
2Centre for Advanced Steels Research, Faculty of Technology, University of Oulu, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2021102552154
Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2022-03-03
Description:

Abstract

A systematic study is conducted on a 17% Cr dual stabilized ferritic stainless steel (FSS) to study the evolution of texture during hot rolling and its effect on ridging resistance after cold rolling and annealing. Hot rolling is conducted on a 4-high laboratory rolling mill with finishing temperatures in the range of 1000–810 °C to cover the evolution of microtexture under both conventional hot rolling conditions and when using low finishing temperatures. Subsequently, the hot-rolled coils are cold rolled and annealed to the same final thickness. The microtextures of the samples are evaluated at each process step using scanning electron microscopy combined with electron backscattered diffraction (SEM-EBSD). Lowering the hot rolling finishing temperature results in the formation of intragranular shear bands, which strengthens the γ-fiber in the texture after subsequent annealing of the hot-rolled material. After cold rolling to a reduction of 78% followed by final annealing, the microtexture in the final product correlates with the microtexture after hot rolling. The resistance to ridging in stabilized FSS improves by lowering the finishing temperature during hot rolling. This study shows the importance of the hot rolling process conditions in improving the texture inherited from the casting of FSS.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 92
Issue: 7
Article number: 2000695
DOI: 10.1002/srin.202000695
OADOI: https://oadoi.org/10.1002/srin.202000695
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Copyright information: © 2021 Wiley-VCH GmbH. This is the peer reviewed version of the following article: Kodukula, S., Kokkomäki, H., Puukko, E., Porter, D. and Kömi, J. (2021), Influence of Hot Rolling Finishing Temperature on Texture and Ridging Resistance in Stabilized Ferritic Stainless Steels. steel research int., 92: 2000695, which has been published in final form at https://doi.org/10.1002/srin.202000695. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."