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Modelling of High Temperature Hot-Rolled Steel / AHMAD SAJJAD

Swansea University Author: AHMAD SAJJAD

Abstract

The coilbox is a non-compulsory process used in hot strip milling to produce diverse alloys of hot-rolled steel products. Unlike other hot strip processes, the Coilbox is a passive process usually placed between the roughing and finishing mills which does not introduce any extra heat or mechanical s...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Master of Research
Degree name: MSc by Research
Supervisor: Lavery, Nicholas. and Brown, Steve.
URI: https://cronfa.swan.ac.uk/Record/cronfa64635
first_indexed 2023-09-28T10:09:01Z
last_indexed 2024-11-25T14:14:24Z
id cronfa64635
recordtype RisThesis
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spelling 2023-09-28T11:15:14.4626631 v2 64635 2023-09-28 Modelling of High Temperature Hot-Rolled Steel d961c7ba6e5f22cd1b826c4b93d0a3c5 AHMAD SAJJAD AHMAD SAJJAD true false 2023-09-28 The coilbox is a non-compulsory process used in hot strip milling to produce diverse alloys of hot-rolled steel products. Unlike other hot strip processes, the Coilbox is a passive process usually placed between the roughing and finishing mills which does not introduce any extra heat or mechanical stress into the steel strip. The coilbox wraps the steel strip around itself, forming a tight coil and shortening the overall length of the steel strip, and in turn, reduces the overall size of the hot strip mill. The coilbox also reduces heat loss from the steel strip by reducing the total surface area exposed to the environment. Lastly, the coilbox allows the strip to be stored temporarily on the mill while still hot in case of a fault or congestion ahead. Temperature control throughout the hot strip milling process is essential to ensure the end steel product has the correct and expected mechanical properties. Temperatures too high or low can introduce unexpected stresses and damage mill equipment. Due to the importance of temperature control, many mills have thermal models or simulation software that predict the temperature of the steel strip throughout every stage of the milling process. Thermal models of the hot strip are often implemented in-house and specific to manufacturers' requirements and setups. TATA Steel is no different, having developed a strip mill simulation software called TiTAN. This study looks at modifying and implementing a thermal model into TiTAN using the finite element method to allow the user to test and understand the thermal losses of a steel strip as it passes through the coilbox. TiTAN is a quick and efficient modelling software for hot and cold strip mills, although currently, it cannot model temperature changes that may occur during the coilbox process. TATA Steel would like to implement a new module into TiTAN that would allow this functionality. The new model must integrate seamlessly with TiTAN whilst also accurately modelling the steel strip temperature up to 80% of the actual temperature of the steel strip as measured from on-site data. Temperature data from TATA Steels Port Talbot site were analysed to understand the thermal properties of the strip as it passes through the coilbox. Furthermore, how the strip moves through the coilbox was studied to determine if the physical properties of the strip, such as position and speed, would impact the temperature. After building up a good understanding of the properties of the strip as it passes through the coilbox, a model of the coilbox process was developed in TiTAN. E-Thesis Swansea, Wales, UK Finite Element Method, Hot Strip Mill, Heat Transfer, Simulation, Coilbox 28 9 2023 2023-09-28 COLLEGE NANME COLLEGE CODE Swansea University Lavery, Nicholas. and Brown, Steve. Master of Research MSc by Research M2A, Tata Steel 2023-09-28T11:15:14.4626631 2023-09-28T10:55:06.3422914 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering AHMAD SAJJAD 1 64635__28653__f84b65c82e874331bc0b441df4865aa4.pdf 2023_Sajjad_A.final.64635.pdf 2023-09-28T11:12:58.6797372 Output 2797373 application/pdf E-Thesis true Copyright: The Author, Ahmad Sajjad, 2023. true eng
title Modelling of High Temperature Hot-Rolled Steel
spellingShingle Modelling of High Temperature Hot-Rolled Steel
AHMAD SAJJAD
title_short Modelling of High Temperature Hot-Rolled Steel
title_full Modelling of High Temperature Hot-Rolled Steel
title_fullStr Modelling of High Temperature Hot-Rolled Steel
title_full_unstemmed Modelling of High Temperature Hot-Rolled Steel
title_sort Modelling of High Temperature Hot-Rolled Steel
author_id_str_mv d961c7ba6e5f22cd1b826c4b93d0a3c5
author_id_fullname_str_mv d961c7ba6e5f22cd1b826c4b93d0a3c5_***_AHMAD SAJJAD
author AHMAD SAJJAD
author2 AHMAD SAJJAD
format E-Thesis
publishDate 2023
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
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description The coilbox is a non-compulsory process used in hot strip milling to produce diverse alloys of hot-rolled steel products. Unlike other hot strip processes, the Coilbox is a passive process usually placed between the roughing and finishing mills which does not introduce any extra heat or mechanical stress into the steel strip. The coilbox wraps the steel strip around itself, forming a tight coil and shortening the overall length of the steel strip, and in turn, reduces the overall size of the hot strip mill. The coilbox also reduces heat loss from the steel strip by reducing the total surface area exposed to the environment. Lastly, the coilbox allows the strip to be stored temporarily on the mill while still hot in case of a fault or congestion ahead. Temperature control throughout the hot strip milling process is essential to ensure the end steel product has the correct and expected mechanical properties. Temperatures too high or low can introduce unexpected stresses and damage mill equipment. Due to the importance of temperature control, many mills have thermal models or simulation software that predict the temperature of the steel strip throughout every stage of the milling process. Thermal models of the hot strip are often implemented in-house and specific to manufacturers' requirements and setups. TATA Steel is no different, having developed a strip mill simulation software called TiTAN. This study looks at modifying and implementing a thermal model into TiTAN using the finite element method to allow the user to test and understand the thermal losses of a steel strip as it passes through the coilbox. TiTAN is a quick and efficient modelling software for hot and cold strip mills, although currently, it cannot model temperature changes that may occur during the coilbox process. TATA Steel would like to implement a new module into TiTAN that would allow this functionality. The new model must integrate seamlessly with TiTAN whilst also accurately modelling the steel strip temperature up to 80% of the actual temperature of the steel strip as measured from on-site data. Temperature data from TATA Steels Port Talbot site were analysed to understand the thermal properties of the strip as it passes through the coilbox. Furthermore, how the strip moves through the coilbox was studied to determine if the physical properties of the strip, such as position and speed, would impact the temperature. After building up a good understanding of the properties of the strip as it passes through the coilbox, a model of the coilbox process was developed in TiTAN.
published_date 2023-09-28T05:11:15Z
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score 11.090009

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