Online Cooling System and Improved Similar Self-adaptive Strategy for Hot-rolled Seamless Steel Tube

Dong, Chen; Zhang, Rui; Li, Yunjie; Yuan, Guo

doi:10.2355/isijinternational.isijint2021-013

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…The calculation of the temperature field is achieved using the three-dimensional thermal conductivity differential equation in the cylindrical coordinate system, and its expression is shown as follows [7,10,25]:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Previous studies mainly focused on the heat transfer of steel tubes or cylindrical surfaces [7][8][9][10][11], but stress changes during cooling were rarely reported. Ali et al [12] studied the comprehensive effects of time, material properties, and the ratio of the inner and outer radius on the transient temperature gradient and provided an empirical solution for the thermal stress of the cylinder under the conditions of heating, secondary heating, and forced-air impact cooling.…”

Section: Introductionmentioning

confidence: 99%

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Quenching Stress of Hot-Rolled Seamless Steel Tubes under Different Cooling Intensities Based on Simulation

Rui

Chen

Quan

et al. 2022

Metals

Self Cite

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Large residual stress occurs during the quenching process of hot-rolled seamless steel tubes, which results in bending, cracking, and ellipticity exceeding standards and seriously affects the quality of hot-rolled seamless steel tubes. In addition, the stress generation mechanism of hot-rolled seamless steel tubes is different from that of steel plates due to the characteristics of annular section. In this research, the finite element simulation method was used to study the quenching residual stress of seamless steel tubes with different cooling intensities. The variation law of temperature and stress on the steel tube under different cooling intensities were analyzed. The results show that the radial stress was close to 0, and the circumferential and axial stresses were the main factors affecting the quality of the steel tube. With the increase in the cooling time, the magnitude and direction of each stress component of the steel tube changed simultaneously. Finally, a typical stress distribution state of “external compressive stress, internal tensile stress” was presented in the thickness direction of the steel tube. Furthermore, with the increase in the cooling intensity, the residual stress of the steel tube gradually increased and was mainly concentrated on the near wall of the steel tube.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quenching Stress of Hot-Rolled Seamless Steel Tubes under Different Cooling Intensities Based on Simulation

Rui

Chen

Quan

et al. 2022

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Extensive efforts have been made on optimizing the microstructure and mechanical properties of alloy steels by controlling cooling. [17][18][19] However, the studies on controlling cooling after hot rolling of duplex low-density steels are still rarely reported. In the present work, different cooling rates were adopted in a low-density duplex steel after hot rolling for investigating the relevant influencing mechanism.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Strength and Ductility of an Fe–Mn–Al–C Low‐Density Duplex Steel by Controlling the Cooling Path after Hot Rolling

Li,

Chen,

Wang

et al. 2023

Adv Eng Mater

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The low‐density duplex steels provide a potential for the industrial application owing to their good strength‐ductility match and reduced density. In the present work, the microstructure of an Fe–8.03Mn–6.10Al–0.4C (wt%) low‐density duplex steel was adjusted by controlling the cooling path after hot rolling, which is a conventional process during the production of steel sheets and strips. A microstructure of ferrite and austenite has been achieved by annealing the air‐cooled samples, and the microstructure of furnace‐cooled annealed samples consists of banded ferrite, austenite, and martensite. This is mainly due to the fact that the austenite is more stable by refining the grain size via embedding the needle‐like α‐ferrite. The existing of martensite and the banded microstructure in furnace‐cooled annealed samples induces the occurrence of cracks during deformation, resulting in an abrupt fracture at a relatively lower strain level. However, for air‐cooled annealed samples, a good ductility of duplex microstructure ensures that the deformation can be sustained up to a much higher strain level, and the transformation induced plasticity effect plays a positive role at the later deformation stage; this contributes to the occurrence of an extra work hardening rate recovery during deformation and thus to a good strength‐ductility match.

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Cooling performance of the hot-rolled seamless steel tube with different jet forms

Zhang,

Li,

Zhang

et al. 2024

International Journal of Thermal Sciences

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Online Cooling System and Improved Similar Self-adaptive Strategy for Hot-rolled Seamless Steel Tube

Cited by 4 publications

References 25 publications

Quenching Stress of Hot-Rolled Seamless Steel Tubes under Different Cooling Intensities Based on Simulation

Quenching Stress of Hot-Rolled Seamless Steel Tubes under Different Cooling Intensities Based on Simulation

Tailoring Strength and Ductility of an Fe–Mn–Al–C Low‐Density Duplex Steel by Controlling the Cooling Path after Hot Rolling

Cooling performance of the hot-rolled seamless steel tube with different jet forms

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