The Influence of Short-Term High Temperature Environment on the Non-Uniform Distribution of Ferrite Grain Size in 40 mm-thick Q345 Steel

• Autorzy: Xu Hao , Gou Rui-Bin , Yu Min , Dan Wen-Jiao , Wang Nian

Identyfikatory

DOI

10.24425/amm.2024.147809

• Języki publikacji: EN

Abstrakty

EN

In order to reveal the non-uniform distribution of grain size in thick direction for engineering heavy plate, microstructure of 40 mm-thick Q345 steel was observed and measured under different short-term high temperature environments formed by fire. Moreover, the influence of the short-term high temperature environment was revealed on the distribution of ferrite grain size in the Q345 steel. Under different fire service environments, there was a log-normal distribution relationship between the distribution parameter N_f (number of ferrite grains) and d_f (average grain diameter), as well as ρ_Af (area fraction density) and d_f, at different positions along the thickness direction. However, the statistical results are greatly affected by the length of the statistical interval. When d_f is about 4 to 6 times the length of the statistical interval, the statistical accuracy is higher. By using nonlinear fitting method, multiple non-uniform distribution empirical models including N_f-d_f empirical formulas and ρ_Af-d_f empirical formulas were established at different positions along thick direction under various fire environments. Furthermore, the interrelationships between fire temperature T and N_f, T and ρ_Af, fire duration t and N_f, t and ρ_Af were revealed, respectively.

Słowa kluczowe

EN

short-term high temperature environment; Q345 thick plate; microstructure; distribution model

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2024
• Tom: Vol. 69, iss. 1
• Strony: 197--208
• Opis fizyczny: Bibliogr. 26 poz., fot., rys., tab., wzory

Twórcy

autor

Xu Hao

• Anhui Science and Technology University, College of Mechanical Engineering, Fengyang 233100, Anhui, China

• https://orcid.org/0009-0003-8864-6008

autor

Gou Rui-Bin

• Anhui Science and Technology University, College of Mechanical Engineering, Fengyang 233100, Anhui, China

• https://orcid.org/0000-0002-9251-2964

autor

Yu Min

• Anhui Science and Technology University, College of Architecture, Bengbu 233000, China

• https://orcid.org/0009-0008-3171-0220

autor

Dan Wen-Jiao

• Anhui Science and Technology University, College of Mechanical Engineering, Fengyang 233100, Anhui, China

• https://orcid.org/0000-0002-5106-0850

autor

Wang Nian

• Bengbu Special Equipment Supervision and Inspection Center, Bengbu 233000, China

• https://orcid.org/0009-0004-0082-4939

Bibliografia

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Uwagi

This work was funded by Anhui University Science Research Projects (2022AH051630, KJ2021A0862 and KJ2021ZD0111), Anhui Market Bureau Science and Technology Plan Project (2021MK034) and Bengbu Technology Plan Project (2022hm06), respectively.