Modelling of the cooling process of steel tubes in a rake type cooling bed

Raic, Juraj; Landfahrer, Martin; Klarner, Jürgen; Zmek, Thomas; Hochenauer, Christoph

doi:10.1016/j.applthermaleng.2019.114895

Cited by 5 publications

(1 citation statement)

References 35 publications

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“…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%

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

Rui

Chen

Quan

et al. 2022

Metals

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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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