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https://doi.org/https://doi.org/10.64486/m.65.4.1

Effect of Cooling Rate on the Precipitation Behavior of MnS Inclusions in 46MnVS5 Non-Quenched and Tempered Steel

H.K. Sun ; Metallurgy and Energy College, North China University of Science and Technology, Tangshan, China
Y.H. Li ; Key Laboratory of lntelligent Equipment Digital Design and Process Simulation, Tangshan University, Tangshan, China
P. J. Li ; HBIS Group Shisteel Company, Shijiazhuang, China
S.H. Wang ; Metallurgy and Energy College, North China University of Science and Technology, Tangshan, China
B. X. Lu ; Tangshan Iron and Steel Group Co., Ltd. Technology Research and Development Center, Tangshan, China
Y.K. Xue ; Metallurgy and Energy College, North China University of Science and Technology, Tangshan, China *

* Dopisni autor.

Sažetak

This study systematically investigated the effects of cooling rates on the morphol-ogy, size, distribution, and microstructural properties of MnS inclusions in 46MnVS5 non-quenched and tempered steel through three cooling methods: water quenching, air quenching, and furnace cooling. Results indicate that cooling rate significantly regulates MnS precipitation behavior: under furnace cooling, MnS forms coarse particles that aggregate along grain boundaries, leading to reduced properties; air cooling produced spherical or short rod-shaped MnS with uniform distribution and optimal comprehensive properties; water cooling resulted in fine, dispersed MnS with a martensite/bainite microstructure, enhancing toughness but requiring tempering treatment. A nonlinear relationship between cooling rate and average MnS diameter was established, providing theoretical support for opti-mizing air cooling processes.

Ključne riječi

non quenched and tempered steel; cooling rate; MnS inclusions; microstructure

Hrčak ID:

347928

URI

https://hrcak.srce.hr/347928

Datum izdavanja:

1.10.2026.

Posjeta: 15 *