A study on kinetics of static and metadynamic recrystallization during hot rolling

Serajzadeh, S.

doi:10.1016/j.msea.2006.10.070

Cited by 23 publications

(5 citation statements)

References 18 publications

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“…On the other hand, mathematical models have also been developed and simulations have been carried out in order to evaluate the austenite recrystallization or softening kinetics and the resulting grain size during hot rolling of steels, i.e. under non-isothermal conditions [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Assessment of austenite static recrystallization and grain size evolution during multipass hot rolling of a niobium-microalloyed steel

Gómez¹,

Rancel²,

Medina³

2009

Met. Mater. Int.

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Double-deformation isothermal tests and multipass continuous-cooling hot torsion tests were used to study the evolution of austenite microstructure under isothermal and nonisothermal hot deformation of a Nb microalloyed steel. Thanks to these tests and with the assistance of microstructural characterization, it has been verified that norecrystallization temperature (T nr ) approximately corresponds to the temperature where recrystallization starts to be incomplete during rolling. An accurate method to estimate the recrystallized fraction during hot rolling from stress-strain data and with no need of metallographic studies is proposed. The results of this method have been successfully compared to metallographic measurements, the values of non-isothermal fractional 3 softening and the accumulated stress measured in the plots of mean flow stress (MFS) versus the inverse of temperature. A remarkable austenite grain refinement occurs in the first hot rolling passes after reheating. If the effect of grain size on recrystallization and precipitation is taken into account, the correlation of isothermal and continuous cooling tests is better understood.

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Section: Introductionmentioning

confidence: 99%

Assessment of austenite static recrystallization and grain size evolution during multipass hot rolling of a niobium-microalloyed steel

Gómez¹,

Rancel²,

Medina³

2009

Met. Mater. Int.

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“…In industrial forming processes, the hot rolling and forging processes often consist of several successive deformation passes, including inter-pass periods between deformations. During the inter-pass periods, the alloys will subject the dynamic recrystallization [1][2][3], static recrystallization [4][5][6], and metadynamic recrystallization [7][8][9][10]. Meanwhile, the metals and alloys often subject to complex time, strain, strain rate, and temperature histories.…”

Section: Introductionmentioning

confidence: 99%

Study of microstructural evolution during metadynamic recrystallization in a low-alloy steel

Lin

Chen

2009

Materials Science and Engineering: A

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“…42CrMo is selected as the materials of the simulation model [22,23,24,25]. At 0.01 s −1 strain rate, the true stress-strain curves of 42CrMo at different temperatures are shown in Figure 4, and the curve is subjected to multivariate nonlinear fitting.…”

Section: Materials and Fe Modelmentioning

confidence: 99%

Influencing Factors of Void closure in Skew-Rolled Steel Balls Based on the Floating-Pressure Method

et al. 2019

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Due to the instable conditions caused by the wear of rollers, macro voids inevitably occur in skew rolling steel balls. Macro voids in rolled balls greatly weakens the mechanical properties, resulting in the scrapping of about 23% of all skew rolling balls. This paper adopts the floating-pressure method (FPM) to eliminate macro voids in rolled steel balls, and mainly focuses on the investigation of the influencing factor void closure in skew-rolled balls. The research contents are listed as follows: Firstly, the mechanical model of FPM eliminating void in rolled steel balls is established, and the theoretical relationship between influencing factors of void closure is obtained. Then, the metal flow behaviors, the stress distribution and the effect of process parameters on void closure are revealed by numerical analysis. Subsequently, based on the uniform design method, the prediction equation of the required temperature and air pressure for compacting various inferior rolled balls with different diameter by FPM is deduced. Finally, the FPM experiment is carried out to verify the results of numerical analysis. The research results provide theoretical guidance for eliminating macro voids in skew-rolled steel balls.

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A study on kinetics of static and metadynamic recrystallization during hot rolling

Cited by 23 publications

References 18 publications

Assessment of austenite static recrystallization and grain size evolution during multipass hot rolling of a niobium-microalloyed steel

Assessment of austenite static recrystallization and grain size evolution during multipass hot rolling of a niobium-microalloyed steel

Study of microstructural evolution during metadynamic recrystallization in a low-alloy steel

Influencing Factors of Void closure in Skew-Rolled Steel Balls Based on the Floating-Pressure Method

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