Analysis of various versions of the deoxidation of rail steel at OAO NTMK

Garber, A. K.; Арсенкин, А. М.; Григорович, К. В.; Shibaev, S. S.; Kushnarev, A. V.; Petrenko, Yu. P.

doi:10.1134/s0036029509070064

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…[ 33–35 ] Inclusions in the heavy rail steel in the current study were mainly SiO 2 –Al 2 O 3 –MnO ones as SiMn deoxidation was performed. [ 36 ] Although many existing studies were available to control MnS inclusions in the steel, the mechanism of MnS precipitation on SiO 2 –Al 2 O 3 –MnO inclusions in the heavy rail steel was still unclear. It was of great significance to clarify the mechanism of MnS heterogeneous nucleation on SiO 2 –Al 2 O 3 –MnO oxide inclusions in the heavy rail steel, especially when aluminum in the steel varied within a big range.…”

Section: Introductionmentioning

confidence: 99%

In Situ Observation on the Heterogeneous Nucleation of MnS in Heavy Rail Steels with Varied Aluminum Content

Song

Zhu

et al. 2023

steel research int.

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Heavy rail steels are widely used in railway transportation owing to their high strength and great toughness properties nowadays. [1][2][3] The number, size, composition, morphology, and spatial distribution of nonmetallic inclusions in steel have a crucial impact on the cleanliness and performance of the steel product. [4][5][6][7][8] Particularly, large and long MnS inclusions precipitated during heat treatment after rolling of the steel and have a detrimental effect on the strength and corrosion resistance of heavy rail steels. [9][10][11][12][13] Many studies were reported to control large-sized MnS inclusions according to the characteristic and source of MnS in the steel, such as slag refining, [14,15] calcium/magnesium addition, [16][17][18][19] zirconium/cerium addition, [20][21][22] heat treatment process, [23,24] and heterogeneous nucleation improvement. [25][26][27] Oikawa et al. [28,29] studied the effect of Ti addition on the formation and distribution of MnS inclusions in Fe-0.1%C-1%Mn-0.02%S steels during solidification. The reason for the significant size reduction of MnS inclusions was the (Ti, Mn)O composite oxides generated at solid/liquid interface of the steel with Ti addition, which acted as heterogeneous nucleation cores for the formation of MnS. Zhang et al. [30] investigated the characteristics of MnS particles at three different cooling rates of 80.4 K s À1 (water cooling), 3.8 K s À1 (air cooling), and 1.8 K s À1 (furnace cooling). With the decreasing cooling rate, the 3D morphology of MnS changed from nearly spherical into rod like and the area fraction and average diameter of MnS increased. Li et al. [25] studied the mechanism of MnS precipitation on Al 2 O 3 -SiO 2 inclusions during the solidification of nonoriented silicon steel. MnS can precipitate on micrometer-sized oxides and its precipitation behavior was governed by the phase structure of the oxides. Nowadays, promoting the heterogeneous nucleation of MnS inclusions was acknowledged as an effective method to reduce flaw detection defects of steel heavy rails.The precipitation of MnS inclusions mostly occurred in steel during cooling and during heating processes. [31,32] It was reported that MnS inclusions near the grain boundary of the steel were usually large and long and well deformed during steel rolling while MnS that precipitated around oxide inclusions were nearly spherical and difficultly deformed during steel rolling.

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Section: Introductionmentioning

confidence: 99%

In Situ Observation on the Heterogeneous Nucleation of MnS in Heavy Rail Steels with Varied Aluminum Content

Song

Zhu

et al. 2023

steel research int.

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Production of High-Quality Wheel Steel. Part 2. Nonmetallic Inclusion Composition and Morphology

Pumpyanskiy

Tyutyunik

Kolokolov³

et al. 2021

Metallurgist

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Study of the influence of thermal treatment on the structure and mechanical properties of carbon rail steel

Nagicheva

Nokhrin

Пискунов

et al. 2019

J. Phys.: Conf. Ser.

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The article provides the results of investigation of the way various types of thermal treatment affect the microstructure parameters and mechanical properties of grade 76HF (R65) carbon rail steels produced by Russian and Japanese manufacturers and used for the production of R65 rails. We determined the optimal heat treatment conditions to provide an increased microhardness and wear resistance of rail steel.

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Analysis of various versions of the deoxidation of rail steel at OAO NTMK

Cited by 6 publications

References 2 publications

In Situ Observation on the Heterogeneous Nucleation of MnS in Heavy Rail Steels with Varied Aluminum Content

In Situ Observation on the Heterogeneous Nucleation of MnS in Heavy Rail Steels with Varied Aluminum Content

Production of High-Quality Wheel Steel. Part 2. Nonmetallic Inclusion Composition and Morphology

Study of the influence of thermal treatment on the structure and mechanical properties of carbon rail steel

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