Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress
Considerable residual stress is produced during heat treatment. Compressive residual stress at the shell is conductive to improving the thermal fatigue life of a work roll, while tensile stress in the core could cause thermal breakage. In hot rolling, thermal stress occurs under the heating-cooling...
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MDPI AG
2019-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/9/966 |
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| author | Kejun Hu Fuxian Zhu Jufang Chen Nao-Aki Noda Wenqin Han Yoshikazu Sano |
| author_facet | Kejun Hu Fuxian Zhu Jufang Chen Nao-Aki Noda Wenqin Han Yoshikazu Sano |
| author_sort | Kejun Hu |
| collection | DOAJ |
| description | Considerable residual stress is produced during heat treatment. Compressive residual stress at the shell is conductive to improving the thermal fatigue life of a work roll, while tensile stress in the core could cause thermal breakage. In hot rolling, thermal stress occurs under the heating-cooling cycles over the roll surface due to the contact with the hot strip and water spray cooling. The combination of thermal stress and residual stress remarkably influences the life of a work roll. In this paper, finite element method (FEM) simulation of hot rolling is performed by treating the residual stress as the initial stress. Afterwards, the effects of the initial roll temperature and cooling conditions on thermal stress considering the initial residual stress are discussed. Lastly, the thermal fatigue life of a work roll is estimated based on the strain life model. The higher initial roll temperature causes a higher temperature but a lower compressive thermal stress at the roll surface. The surface temperature and compressive stress increase significantly in the insufficient cooling conditions, as well as the center tensile stress. The calculation of the fatigue life of a work roll based on the universal slopes model according to the 10% rule and 20% rule is reasonable compared with experimental results. |
| first_indexed | 2024-12-20T19:50:09Z |
| format | Article |
| id | doaj.art-cbb9ca46ddfe444e8a6d3eed3bf2caa2 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T19:50:09Z |
| publishDate | 2019-09-01 |
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| series | Metals |
| spelling | doaj.art-cbb9ca46ddfe444e8a6d3eed3bf2caa22022-12-21T19:28:20ZengMDPI AGMetals2075-47012019-09-019996610.3390/met9090966met9090966Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual StressKejun Hu0Fuxian Zhu1Jufang Chen2Nao-Aki Noda3Wenqin Han4Yoshikazu Sano5School of Materials and Engineering, Jiangsu University of Technology, Changzhou 213001, ChinaSchool of Materials and Engineering, Jiangsu University of Technology, Changzhou 213001, ChinaSchool of Materials and Engineering, Jiangsu University of Technology, Changzhou 213001, ChinaDepartment of Mechanical Engineering, Kyushu Institute of Technology, Kitakyushushi 804-8550, JapanSchool of Materials and Engineering, Jiangsu University of Technology, Changzhou 213001, ChinaDepartment of Mechanical Engineering, Kyushu Institute of Technology, Kitakyushushi 804-8550, JapanConsiderable residual stress is produced during heat treatment. Compressive residual stress at the shell is conductive to improving the thermal fatigue life of a work roll, while tensile stress in the core could cause thermal breakage. In hot rolling, thermal stress occurs under the heating-cooling cycles over the roll surface due to the contact with the hot strip and water spray cooling. The combination of thermal stress and residual stress remarkably influences the life of a work roll. In this paper, finite element method (FEM) simulation of hot rolling is performed by treating the residual stress as the initial stress. Afterwards, the effects of the initial roll temperature and cooling conditions on thermal stress considering the initial residual stress are discussed. Lastly, the thermal fatigue life of a work roll is estimated based on the strain life model. The higher initial roll temperature causes a higher temperature but a lower compressive thermal stress at the roll surface. The surface temperature and compressive stress increase significantly in the insufficient cooling conditions, as well as the center tensile stress. The calculation of the fatigue life of a work roll based on the universal slopes model according to the 10% rule and 20% rule is reasonable compared with experimental results.https://www.mdpi.com/2075-4701/9/9/966work rollresidual stressthermal stressthermal fatigueFEM |
| spellingShingle | Kejun Hu Fuxian Zhu Jufang Chen Nao-Aki Noda Wenqin Han Yoshikazu Sano Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress Metals work roll residual stress thermal stress thermal fatigue FEM |
| title | Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress |
| title_full | Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress |
| title_fullStr | Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress |
| title_full_unstemmed | Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress |
| title_short | Simulation of Thermal Stress and Fatigue Life Prediction of High Speed Steel Work Roll during Hot Rolling Considering the Initial Residual Stress |
| title_sort | simulation of thermal stress and fatigue life prediction of high speed steel work roll during hot rolling considering the initial residual stress |
| topic | work roll residual stress thermal stress thermal fatigue FEM |
| url | https://www.mdpi.com/2075-4701/9/9/966 |
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