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Differential Microstructure and Properties of Boron Steel Plates Obtained by Water Impinging Jet Quenching Technique
Division of Engineering Materials Department of Management and Engineering Linköping University 58183 Linköping Sweden;Division of Building, Energy and Environmental Engineering Department of Technology and Environment University of Gävle 80176 Gävle Sweden.ORCID iD: 0000-0001-7026-531X
Ericsson AB.
Väderstad Components AB 59472 Överum Sweden.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. Linköpings universitet.ORCID iD: 0000-0003-3472-4210
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2023 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Soil-working tools in agriculture are made of boron-containing steels with high wear resistance and hardenability. Nevertheless, these tools are subject to high impacts, abrasive wear, and fatigue and are therefore prone to failure. To combine varying levels of properties within one component in as-quenched condition can be beneficial for such products. To obtain this property variation, a component must undergo a complex and controllable cooling. Therefore, the aim of this work is to obtain a microstructure gradient along two 15 mm-thick steel plates in a newly developed test rig by water jet impingement technique to confirm its controllability and flexibility. Furthermore, a quenching simulation model is created for hardness prediction using phase transformation data from a machine learning tool. Microstructure variation is observed using light optical microscopy and the electron backscatter diffraction technique. Mechanical properties are studied through tensile tests and hardness measurements and are also compared with simulation results. The 0.27 mass% C steel sample is obtained in almost fully martensitic state transitioning to a softer ferritic/bainitic condition, while the 0.38 mass% C steel sample results predominantly into a fully hardened martensitic state and slightly shows ferritic and bainitic features along the sample. The quenching simulation model shows promising hardness prediction for both steels.

Place, publisher, year, edition, pages
Wiley , 2023.
Keywords [en]
boron steel; critical cooling rate; differential quenching; hardenability; martensite
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:hig:diva-43159DOI: 10.1002/srin.202300406ISI: 001082647000001Scopus ID: 2-s2.0-85174217303OAI: oai:DiVA.org:hig-43159DiVA, id: diva2:1806537
Funder
Vinnova, 2017-02281Swedish Agency for Economic and Regional Growth, 20201438Available from: 2023-10-23 Created: 2023-10-23 Last updated: 2023-11-05Bibliographically approved

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Moshfegh, Bahram

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