Study on austenite recrystallization softening behavior of GCr15 steel

Yang, Hongbo; Yao, Peiwen; Liu, Huan

doi:10.1088/1757-899x/493/1/012034

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also based on the EM model, Zhang et al [10] calculated the flow stresses in Cr-Mn-Si-Ni steel under high temperature tension. Yang et al [11] quantified the softening behavior and microstructural evolution of GCr15 steel wire rods during rolling and found that sub-dynamic recrystallisation and static recrystallisation (SRX) played an important role in interpass softening. Xu et al [12] developed a modified kinetic equation to predict the SRX softening behavior of 12Cr rotor steel.…”

Section: Introductionmentioning

confidence: 99%

Unified Modelling of Flow Stress and Microstructural Evolution of 300M Steel under Isothermal Tension

Chen

Zhang

Wang

et al. 2021

Metals

View full text Add to dashboard Cite

Constitutive models that reflect the microstructure evolution is of great significance to accurately predict the forming process of forging. Through thermal tension of 300M steel under various temperatures (950~1150 °C) and strain rates (0.01~10 s−1), the material flow and microstructure evolutions were investigated. In order to describe both the exponential hardening phenomenon at a higher temperature, and the softening phenomenon due to recrystallization at a lower temperature, a constitutive model considering microstructure evolution was proposed based on the Kocks–Mecking model. It was found that considering the stress-strain curve to be exponential in the work-hardening stage could improve the constitutive model prediction precision. The average error was 2.43% (3.59 MPa), showing that the proposed model was more precise than the modified Arrhenius model and the Kocks–Mecking model. The models to describe recrystallization kinetics and average grain size were also constructed. This work enabled the Kocks–Mecking model to predict stress-strain curves with a higher accuracy, and broadened the applicable range of the Kocks–Mecking model.

show abstract

Section: Introductionmentioning

confidence: 99%

Unified Modelling of Flow Stress and Microstructural Evolution of 300M Steel under Isothermal Tension

Chen

Zhang

Wang

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

Numerical Simulation of Microstructure Evolution of Large GCr15 Bar during Multi-Pass Rough Rolling

Han

Xi-nan

Ding

et al. 2022

Metals

View full text Add to dashboard Cite

Severe temperature gradients and inhomogeneous strain distribution exist in the large cross-section of GCr15 bearing steel during the hot bar rolling process, resulting in a complex microstructure evolution in the bar. To promote the performance of the bar, a thermal-mechanical coupled finite element (FE) model was developed to capture the variations in temperature and deformation strain. A subroutine, considering the dynamic recrystallization (DRX), meta-dynamic recrystallization (MDRX), static recrystallization (SRX), and grain growth (GG) of austenite grains of GCr15 steel, was developed and coupled to the FE model to predict the microstructure’s evolution during rough rolling. The simulation implies that the inner part of the bloom is deformed at high temperatures due to the heat generated by plastic deformation and slow heat conduction, while the surface temperature decreases along with the passes. The heavy reduction design with 11 passes was found to introduce higher strains at the center regions than those of the same rough rolling reduction divided into 13 passes. The higher strains at the center regions refined the grain size and promoted microstructure homogeneity. The observation of the microstructures after hot bar rolling confirmed the refinement of the heavy reduction design for rough rolling. Furthermore, the heavy rough rolling reduction was found to be beneficial for alleviating the macrosegregation of the casting bloom.

show abstract

Study on austenite recrystallization softening behavior of GCr15 steel

Cited by 2 publications

References 2 publications

Unified Modelling of Flow Stress and Microstructural Evolution of 300M Steel under Isothermal Tension

Unified Modelling of Flow Stress and Microstructural Evolution of 300M Steel under Isothermal Tension

Numerical Simulation of Microstructure Evolution of Large GCr15 Bar during Multi-Pass Rough Rolling

Contact Info

Product

Resources

About