Influence of Electropulsing Treatment on the Initial Solidification of Molten Steel During Continuous Casting

Ying, Guomin; Wang, Wanlin; Zhang, Haihui; Zeng, Jie

doi:10.1007/s11663-019-01601-4

Cited by 6 publications

(4 citation statements)

References 44 publications

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“…As a new nonequilibrium processing technology, EPT has achieved more focus and been extensively applied in materials science and metallurgical engineering. [ 140–144 ] There are also a few researches on the impact of EPT on the evolution of inclusions. [ 145–147 ]…”

Section: Methods For Sulfide Controlmentioning

confidence: 99%

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State‐of‐the‐Art in the Control of Sulfides in Steels

Gao,

Zhang

2023

steel research int.

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Sulfides like MnS are common phases in resulfurized free‐cutting steels, and required to be controlled during the hot working process due to its influence on machinability, mechanical and physical properties of final products. This article extensively reviews published researchs on sulfides in resulfurized free‐cutting steels. The formation mechanism and modification of MnS during steelmaking, casting, and heat treatment are discussed based on a number of relevant studies. Measures to control the morphology and number of sulfides are supplied, which are beneficial for the producing of resulfurized free‐cutting steels with high quality. Thermodynamic calculation proves to be an effective method to predict and control sulfides.This article is protected by copyright. All rights reserved.

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Section: Methods For Sulfide Controlmentioning

confidence: 99%

“…engineering. [140][141][142][143][144] There are also a few researches on the impact of EPT on the evolution of inclusions. [145][146][147] EPT also has an important effect on the size and number of MnS in resulfurized free-cutting steels.…”

Section: Electropulsing Treatment During Melting and Solidificationmentioning

confidence: 99%

State‐of‐the‐Art in the Control of Sulfides in Steels

Gao,

Zhang

2023

steel research int.

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“…In recent years, electric current pulse (ECP) has been used as a kind of nonequilibrium treatment in the manufacturing process. [22][23][24][25][26][27] At present, there have been many studies reported on the effects of ECP on the precipitation behavior of the secondary phase. [28][29][30][31] Wang found that the diffusion activation energy of Pb was reduced significantly by ECP treatment in the Cu-Zn alloy, and Pb particles were dissolved and transferred into defects or grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Effects of Electric Current Pulse Treatment on Phosphide Precipitation Behavior in 304 Stainless Steel

Jia

Zhong

et al. 2023

steel research int.

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The precipitation behavior of phosphides in melting and solidification of 304 stainless steel under treatment using an electric current pulse (ECP) is studied. The composition and crystal structure of phosphides are confirmed and analyzed via scanning electron microscope and transmission electron microscope (TEM). The results show that the phosphides are composed of Cr, Mn, S, and P in the sample that is quenched at 1773 K without ECP treatment. From the high-resolution TEM images and selected area electron diffraction, the crystal lattice structure of phosphides is the same as that of Cr 3 P. Mn and S replace some of the Cr and P in the Cr 3 P lattice because of the replacement solution. Phosphides are hardly detected in the samples that are treated using ECP. ECP treatment inhibits the formation of Cr 3 P. Phosphide is mainly presented in the form of CrP 4 in the samples that are quenched at 1583 K, which contain a large number of nanoaustenite grains. Meanwhile, ECP treatment inhibits the growth of phosphides because of differences in the conductivity between molten steel and phosphides during solidification. The size of phosphides decreases with an increase in current density.

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“…Whereas the industrial mold flux is mostly composed of complex mineral raw materials and other solid wastes, the experimental mold flux made of individual chemicals is inaccurate to obtain these physicochemical properties data, and which cannot be directly used to guide the industrial production. Furthermore, many researchers found that the flux film structure is a key factor in controlling the heat transfer and the steel quality [18][19] , but the quantitative relationship between them remains unclear in previous studies. As a result, the present study of the effects of mineral raw materials on mold flux properties and flux film structures is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mineral Raw Materials on Melting and Crystalline Properties of Mold Flux and Mineralogical Structures of Flux Film for Casting Peritectic Steel Slab

et al. 2023

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During peritectic steel continuous casting, mold flux properties and flux film structures play significant roles in controlling slab quality. In this study, mold fluxes and flux films for casting peritectic steel slab were obtained using mineral raw materials such as quartz, wollastonite, fluorite, soda ash and others. The effects of mineral raw materials on mold flux properties and flux film structures were investigated through the measurement of melting point, viscosity, crystallization temperature, critical cooling rate, crystallization ratio and crystalline phase content. The results indicated that with increasing the quartz addition (16 to 24 mass%) and the wollastonite addition (11 to 19 mass%) in mineral raw materials, the melting point, viscosity and wollastonite content of flux film increased, while the crystallization temperature, critical cooling rate, crystallization ratio and cuspidine content of flux film decreased. The melting point, viscosity and wollastonite content of flux film reduced with increasing the fluorite addition (8 to 16 mass%) and soda ash addition (10 to 18 mass%) in mineral raw materials. Furthermore, compared with soda ash, the fluorite predominantly enhanced the crystallization temperature, critical cooling rate, crystallization ratio, cuspidine content of flux film. In addition, it was showed that the heat transfer performance and the slab quality might be primarily attribute to the crystallization ratio and cuspidine content of flux film. These results provided a theoretical foundation for optimizing the mold flux of the peritectic steel and were vital to improving the slab quality.

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Influence of Electropulsing Treatment on the Initial Solidification of Molten Steel During Continuous Casting

Cited by 6 publications

References 44 publications

State‐of‐the‐Art in the Control of Sulfides in Steels

State‐of‐the‐Art in the Control of Sulfides in Steels

Effects of Electric Current Pulse Treatment on Phosphide Precipitation Behavior in 304 Stainless Steel

Effects of Mineral Raw Materials on Melting and Crystalline Properties of Mold Flux and Mineralogical Structures of Flux Film for Casting Peritectic Steel Slab

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