300M钢静态保温过程微观组织演化的原位研究

doi:10.7527/S1000-6893.2023.29734

Abstract

Abstract: The effects of different processing parameters on microstructure evolution of 300M steel during the static holding process are studied in situ by combining hot compression and high-temperature holding experiments. Results show that the influence of strain on the average grain size evolution during the static holding process is mainly attributed to the hereditary of microstructures, the influence of strain rate is mainly attributed to strain storage energy, the influence of holding temperature is mainly attributed to the temperature dependence of static recrystallization, and the influence of holding time is mainly attributed to the mechanism of grain nucleation and annexation. Based on the relationship between processing parameters and grain size evolution, a new grain size model is proposed, which can effectively describe the effects of deformation parameters and static holding parameters on grain size evolution. The above research provides a theoretical foundation for accurately predicting and effectively controlling microstructure evolution during the multi-pass hot forging of 300M steel heavy components.

Key words: ultrahigh strength steel, in-situ investigation, static holding process, microstructure evolution, grain size model

CLC Number:

V261.3

References

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In-situ investigation on microstructure evolution of 300M steel during static holding process

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