Study on dynamic thermal behavior of the steel pipes in walking beam quenching furnace

• Published in: Case studies in thermal engineering 2022-05, Vol.33, p.101997, Article 101997
• Main Authors: Li, Pengju, Li, Guojun, Wei, Linyang, Yi, Zhi
• Format: Article
• Language: English
• Subjects: Coupled heat transfer model; Heating process; Quenching furnace; Steel pipes; Walking beam
• ISSN: 2214-157X; 2214-157X
• DOI: 10.1016/j.csite.2022.101997

In the production process of steel pipe, the quenching is of significance to improve the quality of steel pipe. Therefore, the dynamic thermal behavior of the steel pipe in quenching furnace is studied in this work. The coupled conduction-radiation heat transfer model of steel pipe in walking beam quenching furnace is established. The thermal contact resistance, radiative heat transfer between the steel pipe and the tooth groove, the rotation process and the heating process of steel pipe are considered in this model. The effects of the rotation conditions, tooth groove temperature and size of the steel pipe on thermal behavior of steel pipe are investigated thoroughly. It can be found that keeping the rotation direction of the steel pipe unchanged can reduce the section temperature difference of steel pipe; When the loading of steel pipes is stopped for a period of time, the section temperature difference of the first steel pipe entering the furnace is very large; The large-size steel pipe usually has a large section temperature difference in the initial heating process, which means a lower temperature of tooth grooves in contact with the steel pipe during the initial heating process is required. This work can provide valuable reference for the improvement of quenching quality of steel pipe and on-line supervisory control of the production process.