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Journal articles on the topic 'Steel – Inclusions'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Wang, Yan, Qing Xiao Li, Shuo Ming Wang, and Peng Long Han. "Study of Inclusion’s Source and Character in Different T[O] Content." Advanced Materials Research 887-888 (February 2014): 187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.187.

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Inclusion’s source and character in different T[ content are studied in the paper, molten slag and refractory material that leave in steel are also calculated. Inclusion in steel are principally come from deoxidation, accompany with the decrease of T[ content, influence of molten slag and refractory materials to inclusions are getting more and more serials. Inclusions which come from molten slag and refractory material are 88.9%, 24.6% and 18.1% defenetly. Great influence on non steady large inclusions in T[ steel, when the mold level fluctuation is large, almost 100% of inclusions in steel ha

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2

Wang, Yuhang, Xian Zhang, Wenzhui Wei, Xiangliang Wan, Jing Liu, and Kaiming Wu. "Effects of Ti and Cu Addition on Inclusion Modification and Corrosion Behavior in Simulated Coarse-Grained Heat-Affected Zone of Low-Alloy Steels." Materials 14, no. 4 (February 7, 2021): 791. http://dx.doi.org/10.3390/ma14040791.

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In this paper, the effects of Ti and Cu addition on inclusion modification and corrosion behavior in the simulated coarse-grained heat-affected zone (CGHAZ) of low-alloy steels were investigated by using in-situ scanning vibration electrode technique (SVET), scanning electron microscope/energy-dispersive X-ray spectroscopy (SEM/EDS), and electrochemical workstation. The results demonstrated that the complex inclusions formed in Cu-bearing steel were (Ti, Al, Mn)-Ox-MnS, which was similar to that in base steel. Hence, localized corrosion was initiated by the dissolution of MnS. However, the mai

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3

Wang, Linzhu, Zuobing Xi, and Changrong Li. "Modification of Type B Inclusions by Calcium Treatment in High-Carbon Hard-Wire Steel." Metals 11, no. 5 (April 21, 2021): 676. http://dx.doi.org/10.3390/met11050676.

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To investigate the modification of type B inclusions in high-carbon hard-wire steel with Ca treatment, Si-Ca alloy was added to high-carbon hard-steel, and the composition, morphology, size, quantity, and distribution of inclusions were observed. The samples were investigated by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS). The experimental thermal results showed that the modification effect of inclusion was better in high-carbon hard-wire steel with Al of 0.0053% and Ca of 0.0029% than that in steel with Al of 0.011% and Ca of 0.0052%, in which the inclusions were mai

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4

Wang, Wanlin, Liwen Xue, Tongsheng Zhang, Lejun Zhou, Daoyuan Huang, Weiguang Tian, and Jialin Xu. "Thermodynamics and transient behavior of the inclusion in Si deoxidized stainless steel for high-grade plate." Metallurgical Research & Technology 116, no. 6 (2019): 612. http://dx.doi.org/10.1051/metal/2019042.

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The experiments were carried out to determine the transient behavior of the inclusion in Si-deoxidized stainless steel for high-grade plate. The samples were taken from three heats of the steel during the whole production process from the AOD to the mold, which were subsequently examined by an automatic scanning electron microscope with field energy dispersive spectrometer (FE-SEM&EDS). It can be summarized that appropriate calcium treatment intensity could modify inclusions into liquid ones. Excessive calcium treatment above ([Ca] = 25 ppm) will increase the melting point of the inclusion

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5

Shen, Ping, and Jianxun Fu. "Morphology Study on Inclusion Modifications Using Mg–Ca Treatment in Resulfurized Special Steel." Materials 12, no. 2 (January 9, 2019): 197. http://dx.doi.org/10.3390/ma12020197.

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In resulfurized special steel, MnS and Al2O3 are two main inclusions that deteriorate fatigue life and machinability. It is important that these two inclusions should be well controlled to increase steel quality and usage performance. In the present study, a Mg–Ca treatment was employed to modify the MnS and Al2O3 inclusions in resulfurized steels to reduce detrimental effects on fatigue life and machinability. In the laboratory study, Ni–Mg alloy was added to 16MnCrS5 and 49MnVS3 steels. Both Al2O3 and CaO–Al2O3 were gradually modified to MgO·Al2O3 and MgO, being surrounded by MnS, that is, a

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6

Yu, Huixiang, Muming Li, Jiaming Zhang, and Dexin Yang. "Effect of Mn Content on the Reaction between Fe-xMn (x = 5, 10, 15, and 20 Mass pct) Steel and CaO-SiO2-Al2O3-MgO Slag." Metals 11, no. 8 (July 28, 2021): 1200. http://dx.doi.org/10.3390/met11081200.

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Medium- and high-Mn steels have excellent properties but are very difficult to be commercially produced because of the high content of some alloy elements. To enhance the understanding of the reaction between medium/high-Mn steel and refining slag which is significantly different from the conventional steels, steel and slag composition and the inclusions were investigated by equilibrium reaction between Fe-xMn (x = 5, 10, 15, and 20 mass pct) and CaO-SiO2-Al2O3-MgO top slag at 1873 K in the laboratory. Furthermore, the effect of Mn content on inclusion transformation and steel cleanliness was

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7

Zhu, Tengwei, Feng Huang, Jing Liu, Qian Hu, and Wei Li. "Effects of inclusion on corrosion resistance of weathering steel in simulated industrial atmosphere." Anti-Corrosion Methods and Materials 63, no. 6 (November 7, 2016): 490–98. http://dx.doi.org/10.1108/acmm-05-2015-1538.

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Purpose This paper aims to investigate the atmospheric corrosion mechanism of structural materials to develop more advanced corrosion-control technologies and cost-reduction strategies. As a second phase in steels, the non-metallic oxide inclusions are considered to not only affect the mechanical properties of steel but also the corrosion resistance of steel. So, an important research goal in this paper is to investigate the indoor accelerated corrosion kinetics of Q450NQR1 weathering steel, analyzing the galvanic polarity of different inclusions in electrochemical corrosion microcell between

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8

Gu, Chao, Min Wang, Yanping Bao, Fuming Wang, and Junhe Lian. "Quantitative Analysis of Inclusion Engineering on the Fatigue Property Improvement of Bearing Steel." Metals 9, no. 4 (April 24, 2019): 476. http://dx.doi.org/10.3390/met9040476.

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The fatigue property is significantly affected by the inner inclusions in steel. Due to the inhomogeneity of inclusion distribution in the micro-scale, it is not straightforward to quantify the effect of inclusions on fatigue behavior. Various investigations have been performed to correlate the inclusion characteristics, such as inclusion fraction, size, and composition, with fatigue life. However, these studies are generally based on vast types of steels and even for a similar steel grade, the alloy concept and microstructure information can still be of non-negligible difference. For a quanti

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9

Xing, Zhiguo, Zhiyuan Wang, Haidou Wang, and Debin Shan. "Bending Fatigue Behaviors Analysis and Fatigue Life Prediction of 20Cr2Ni4 Gear Steel with Different Stress Concentrations near Non-metallic Inclusions." Materials 12, no. 20 (October 21, 2019): 3443. http://dx.doi.org/10.3390/ma12203443.

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To investigate the relationship between inclusions and bending fatigue behaviors in 20Cr2Ni4 steel under different stress concentrations. This paper designs a new experimental method to prefabricate different size stress concentrations near the inclusions, and then conducts a new type of bending fatigue test to study the inclusions and their surrounding stress distributions in 20Cr2Ni4 steel. A microhardness tester was combined with laser etching equipment to realize the prefabrication of different stress concentrations at arbitrary positions around any inclusion on the gear steel surface. Thi

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10

Zhou, Xiao Lei, Zhe Shi, and Gui Fang Zhang. "The Evolution of Non-Metallic Inclusions in IF Steel." Applied Mechanics and Materials 696 (November 2014): 62–65. http://dx.doi.org/10.4028/www.scientific.net/amm.696.62.

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At present, China's IF steel production has get a certain scale. But IF steel production is still in the primary stage of development. Therefore, the process control of inclusions in IF steel have become a pressing matter of the moment. This has important theoretical value and practical significance for further development of IF steel production in China. According to the size, the inclusions can be divided into super micro inclusions, micro inclusions and micro inclusions in the steel. According to the deformation capacity, inclusions can be divided into plastic inclusions, semi plastic inclu

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11

Lan, Fangjie, Changling Zhuang, Changrong Li, Guangkai Yang, and Hanjie Yao. "Effect of Calcium Treatment on Inclusions in H08A Welding Rod Steel." Metals 11, no. 8 (July 31, 2021): 1227. http://dx.doi.org/10.3390/met11081227.

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The effect of calcium treatment on inclusions in H08A welding rod steel was studied by industrial experiment and using thermodynamics theory. The effects of inclusion composition, morphology, quantity, and size in H08A welding rod steel before and after calcium treatment were studied by metallographic microscope, scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). Thermodynamic studies show that the addition of calcium can form various forms of xCaO·yAl2O3, under the condition that the composition of molten steel remains unchanged, the control of calcium content is th

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12

Pan, Xiaoqian, and Jian Yang. "Probable Maximum Sizes of Inclusions Predicted by SEV and PSD for BH Steels of Automobile Exposed Panel with Different Sulfur Contents." Metals 10, no. 5 (May 14, 2020): 637. http://dx.doi.org/10.3390/met10050637.

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This study attempted to estimate the maximum size of inclusions in the ultra-low carbon Bake Hardening (BH) steels of automobile exposed panel. The Probable Maximum Sizes (PMS) of inclusions at the different steelmaking stages for BH steel with different sulfur contents were predicted by two methods of Statistics of Extreme Values (SEV) and Particle Size Distribution (PSD). The S content does not show a relationship with the PMS prediction of inclusions in the molten steel in which Al2O3 is the main inclusion, while the higher content of S leads to a larger PMS value in the slab, due to more n

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13

Xue, Zhengliang, Yuqing Weng, and Zhengbang Li. "Zero Inclusion Steel and its Oxide Inclusions Characteristics." steel research international 76, no. 10 (October 2005): 735–39. http://dx.doi.org/10.1002/srin.200506089.

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14

Yu, Huixiang, Dexin Yang, Muming Li, and Ni Zhang. "Effect of CaO–SiO2–Al2O3–MgO top slag on solute elements and non-metallic inclusions in Fe-xMn(x = 10, 20 mass pct) steel." Metallurgical Research & Technology 118, no. 3 (2021): 302. http://dx.doi.org/10.1051/metal/2021025.

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Medium/high manganese steels have broad application prospects in automotive industry, cryogenic material, etc. because of excellent properties. Precise control on steel composition and improvement of cleanliness are very important for commercial production of these steel grades. In this study, the effect of CaO–SiO2–Al2O3–MgO slag on solute elements and inclusions of Fe-xMn(x = 10, 20 mass pct) steel was studied and discussed. After slag/steel reaction, the concentration of Mn and S in steel reduced, while Si increased. Most MnO type inclusions, which were the main inclusions in master high ma

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15

Li, Xiang, Xiao Long, Linzhu Wang, Shouhao Tong, Xiutao Wang, Yin Zhang, and Yutang Li. "Inclusion Characteristics in 95CrMo Steels with Different Calcium and Sulfur Contents." Materials 13, no. 3 (January 30, 2020): 619. http://dx.doi.org/10.3390/ma13030619.

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In order to study the effect of Ca and sulfur contents on the characteristics of inclusions, industrial experiments using 95CrMo steel were conducted. SEM-EDS detections and stereological analysis were used to probe the characteristics of inclusions, including their compositions, morphologies, size, number density, and distribution. The results indicate that there were mainly three types of inclusions in 95CrMo steel billets with 6–18 ppm Ca and 30–100 ppm S: inclusions with single-phased morphology mainly composed of oxides; isolated MnS/CaS-only inclusions; inclusions with multi-phased morph

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16

Dervis Mujagic, Sc, Sc Aida Imamovic, and Sc Mustafa Hadzalic. "NONMETALLIC INCLUSIONS IN AUSTENITIC STAINLESS STEEL AISI 303 MICROALLOYED WITH ZIRCONIUM AND TELLURIUM." International Journal of Advanced Research 9, no. 01 (January 31, 2021): 903–10. http://dx.doi.org/10.21474/ijar01/12368.

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The control of formation of nonmetallic inclusion and the characterization present the basis of improvement of steel product properties and lead to sustainable development in design of new steel grades. In order to produce steels with better machinability, such as AISI 303 grades, a modification of inclusions with carefully designed chemical composition is presented. Sulphur by creating sulphide inclusions reduces friction and cutting resistance, and increases the brittleness of the chip.Considering its harmful effect in steel, as well as the fact that non-metallic inclusions have been insuffi

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17

Al-Gahtani, Masoud, Sunilkumar Pillai, and Ahmad Al-Raddadi. "Characterization of Non-Metallic Inclusions in API Steel Grades Using Automated Energy Dispersive X-Ray." Materials Science Forum 916 (March 2018): 217–20. http://dx.doi.org/10.4028/www.scientific.net/msf.916.217.

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Non-metallic inclusions in API steel grades deteriorate steels’ mechanical properties and their resistance to hydrogen induced cracking. The formation and evolution of inclusion during liquid steel processing was investigated by analyzing samples taken from different stages of the steel making process in API X52 and X60 steel grades. Scanning electron microscope (SEM) with automated feature EDX analyzer (INCAF 250) was used to identify each inclusion in terms of its size, area and composition. It was found that non-metallic inclusions in API X52 and X60 grades from steelmaking and casting samp

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18

Sidorova, Elena, Andrey V. Karasev, Denis Kuznetsov, and Pär G. Jönsson. "Modification of Non-Metallic Inclusions in Oil-Pipeline Steels by Ca-Treatment." Metals 9, no. 4 (March 28, 2019): 391. http://dx.doi.org/10.3390/met9040391.

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Corrosion rate in different steel grades (including oilfield pipeline steels) is determined by the presence of non-metallic inclusions (NMI) in steels. Specifically, the effect of different inclusions on the quality of steels depends on their characteristics such as size, number, morphology, composition, and physical properties, as well as their location in the steel matrix. Therefore, the optimization and control of NMI in steels are very important today to obtain an improvement of the material properties of the final steel products. It is well known that a Ca-treatment of liquid steels in la

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19

Yu, Zhe, and Chengjun Liu. "Modification Mechanism of Spinel Inclusions in Medium Manganese Steel with Rare Earth Treatment." Metals 9, no. 7 (July 21, 2019): 804. http://dx.doi.org/10.3390/met9070804.

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In aluminum deoxidized medium manganese steel, spinel inclusions are easily to form during refining, and such inclusions will deteriorate the toughness of the medium manganese steel. Rare earth inclusions have a smaller hardness, and their thermal expansion coefficients are similar to that of steel. They can avoid large stress concentrations around inclusions during the heat treatment of steel, which is beneficial for improving the toughness of steel. Therefore, rare earth Ce is usually used to modify spinel inclusions in steel. In order to clarify the modification mechanism of spinel inclusio

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20

Khoroshilov, A. D., and K. V. Grigorovich. "Thermodynamic features of the modifi cation of non-metallic inclusions by calcium in low-carbon steels deoxidized by aluminum." Izvestiya. Ferrous Metallurgy 62, no. 11 (December 23, 2019): 860–69. http://dx.doi.org/10.17073/0368-0797-2019-11-860-869.

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Low-carbon steels deoxidized by aluminum are the main group of structural steels produced in Russiaand all over the world. These steels work in key sectors of the economy – construction, automotive, mining and transportation of minerals, etc. The deoxidation of steel melt by aluminum leads to the formation of non-metallic inclusions, which can significantly aﬀect quality of rolled products and reduce the manufacturability of production due to overgrowth of submergednozzles during continuous casting. So, ceteris paribus, only due to contamination of steel with non-metallic inclusions, the follo

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21

Huang, Weishan, Jing-Li Luo, Hani Henein, and Josiah Jordan. "Sulfide stress cracking assessment of low-alloy L80 casing steel in H2S environment." Anti-Corrosion Methods and Materials 66, no. 4 (July 1, 2019): 379–87. http://dx.doi.org/10.1108/acmm-08-2018-1984.

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Purpose This paper aims to evaluate the sulfide stress cracking (SSC) resistance of L80 casing steels with different alloying chemistries (e.g. Ti-B and Mn-Cr-Mo) by correlating the reduction in area ratio with the mechanical property, inclusion and carbide. Design/methodology/approach SSC tests were conducted in 5.0 Wt.% sodium chloride and 0.5 Wt.% acetic acid solution saturated with H2S using constant load tensile method. The microstructure and fracture morphology of the steel were observed using scanning electron microscope. The inclusion and carbide were identified by energy dispersive sp

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22

Zhao, Ding Guo, Shu Huan Wang, and Ming Jian Guo. "Analysis of Inclusion Microstructure in Material Engineering of Steel." Advanced Materials Research 568 (September 2012): 324–27. http://dx.doi.org/10.4028/www.scientific.net/amr.568.324.

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The sample of oxide inclusion was obtained in the different stage of steelmaking for the 65 steel. The microstructure was observed by using scanning electron microscopy (SEM) to analyze the composition and type of inclusions. It was shown that the microscopic inclusions in the high carbon steel were mainly massive and cluster Al2O3, spherical and slope silicate inclusion, calcium-aluminates inclusions and sulphide complex inclusions. The measures including raw material requirement, improving of the converter, LF refining and continuous casting operations were put forward to decrease inclusion.

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23

Shu, Wei, Xue Min Wang, Cheng Jia Shang, and Xin Lai He. "The Influence of Oxide Inclusion on Austenite Grain Size and Heat Affected Zone Toughness for Low Carbon Steels." Materials Science Forum 715-716 (April 2012): 617–22. http://dx.doi.org/10.4028/www.scientific.net/msf.715-716.617.

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The low carbon steels were smelted with special oxide introduction technique and the HAZ properties has been studied with thermal simulation. The optical microscope, SEM and TEM were used to analyze the composition, size and distribution of the inclusions, and the mechanical properties after thermal simulation were also investigated. The influence of oxide inclusions on the austenite grain size was also studied. The results show that after the smelting the inclusion is complex, in the core is Ti oxides about 1-3 micron and around it is MnS. When the reheat temperature is below 1000, the size o

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24

Wang, Linzhu, Junqi Li, Shufeng Yang, Chaoyi Chen, Huixin Jin, Xiang Li, Changling Zhuang, and Jiantao Ju. "Industrial experiment study on inclusion evolution in 95CrMo Steel." Metallurgical Research & Technology 116, no. 5 (2019): 518. http://dx.doi.org/10.1051/metal/2019015.

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In order to clarify the evolution mechanism of inclusions in 95CrMo, the industrial experiments were conducted. The composition, morphology and size of inclusions during refining and solidifying processes were analyzed by SEM-EDS detection and thermodynamic calculations. The inclusion evolution during refining process in molten 95CrMo steel can be concluded as: Al2O3 → Al2O3-MgO-CaO/CaS → Al2O3-MgO-SiO2-CaO-CaS, which is affected by slag-metal reaction and corrosion of refractory. The change of inclusion size during refining was analyzed based on their collision and floatation behavior. The co

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25

Balart, M. J., Claire L. Davis, Martin Strangwood, and J. F. Knott. "Cleavage Initiation in Ti-V-N and V-N Microalloyed Forging Steels." Materials Science Forum 500-501 (November 2005): 729–36. http://dx.doi.org/10.4028/www.scientific.net/msf.500-501.729.

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The effects of matrix microstructure and features of non-metallic inclusion (morphology, type, volume fraction and size) on cleavage initiation in medium-carbon Ti-V-N and V-N microalloyed resulphurized forging steels have been determined by examining fracture surfaces produced in room temperature Charpy impact tests. The steels were generally Al-deoxidised but one V-N steel was Si-deoxidised. It has been found that, in the Ti-treated steel, having a ferrite-pearlite microstructure, brittle fracture initiation occurred at cracked coarse (Ti,V)(C,N) single phase or [(Ti,V)(C,N)/Al2O3/MnS] multi

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26

Wu, Yan Hui, Ding Guo Zhao, Shu Huan Wang, and Jian Sheng Li. "Research on the Controlling Technic of Conclution in If Steel." Advanced Materials Research 557-559 (July 2012): 151–54. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.151.

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Combining with the production experience in steel making and rolling plant, the oxide inclusions of IF steel were investigated. In the operation process, the inclusions of IF steel are main Al2O3-TiN. They are granular and dispersed in the steel, and most of sizes are 1~5μm. In the inclusion center, the Al2O3 plays the role of TiN heterogeneous nucleation center. So reducing the Al2O3 inclusion is essential to stabilize the Ti content and strengthen the fixtation to C and N in steel. The quantity of Al2O3 inclusion was closely relation to the operation process. The Al2O3 inclusions can be sign

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27

Ryabov, A. V., T. V. Prokaeva, and Yu E. Amosova. "Free-Cutting Cr–Ni–Mo Steel." Solid State Phenomena 284 (October 2018): 276–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.276.

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The paper presents theoretical and practical study of formation of non-metallic inclusions in a medium-carbon free-cutting structural steel. FactSage software package was used for thermodynamic modelling of inclusion behaviour. Formation temperature and the amount of aluminium oxides, boron nitrides, manganese sulphides and aluminium nitrides were calculated. Inclusions in the steel form in the sequence Al2O3 > BN > MnS > AlN. The object of practical research was a cast billet of A38KhGMAR grade steel. It was melted in a laboratory induction furnace; boron and nitrogen were introduced

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28

Xiao, Bu Qing, Sheng Fu Li, Xiao Tao Tian, and Jian Xing Wang. "Study of Micro-Inclusion of Grade 45 Steel." Advanced Materials Research 634-638 (January 2013): 1869–73. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1869.

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According to the production process of grade 45 steel(120tBOF→slag refining→ CC), some system analysis are introduced to research on the type composition and quantity of micro-inclusions, and the effect of slag washing production process on the cleanliness of casting slab is evaluated. The results of the study show that: The content of T[O] is 48.75ppm in normal slab, The content of T[O] is 56.2ppm in head slab, The content of T[O] is 49.2ppm in compound casting slab.The main types of micro-inclusion in slab are MnS inclusion and Al2O3 inclusion. The quality of micro-inclusions is 14.32/mm2 in

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29

Li, Yang, Zhou Hua Jiang, Shi You Yin, Ying Zhuang, and Ming Li. "Formation and Control of Inclusions during Steelmaking Process." Applied Mechanics and Materials 52-54 (March 2011): 1681–86. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1681.

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The variation of non-metallic inclusions and total oxygen contents in different steel grades were investigated by taking samples in steelmaking process, including gear steel, anchor chain steel, hard wire steel, bearing steel and spring steel. The inclusions mainly were Al2O3, MnS, and their composite inclusions in aluminum killed steel at the beginning of LF refining due to addition of FeAl alloy during the tapping from EAF and feeding of Al wire in LF process, and then Al2O3 inclusion changed to the Al2O3 - CaO composite inclusions after feeding of SiCa wire. The inclusions at the beginning

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30

Zhang, Tongsheng, Rensheng Li, Wanlin Wang, Shifan Dai, Peisheng Lv, and Yan Tian. "Research on the variation of the inclusion and sulfur content in Pipeline steel." Metallurgical Research & Technology 118, no. 2 (2021): 214. http://dx.doi.org/10.1051/metal/2021010.

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Pipeline steel is widely used in various industries, and the sulfur content and inclusions in steel have a significant impact on performance, which determines whether the steel quality is qualified. The experiments were carried out to explore the sulfur content and inclusion evolution of pipeline steel which was deoxidized by Si–Mn–Al with “EAF-LF-VD-T-CC”. The samples of molten steel and slag were taken during the process of LF-VD-Tundish after EAF tapping. The kinetics model was established to simulate the desulfuration process of molten steel in actual production, obtaining a result which t

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31

Liu, Yang, Jing Li, Jinpeng Ge, and Dingli Zheng. "Effect of Acid Slag Treatment on the Inclusions in GCr15 Bearing Steel." High Temperature Materials and Processes 38, no. 2019 (February 25, 2019): 760–66. http://dx.doi.org/10.1515/htmp-2019-0024.

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AbstractBy laboratory slag/steel reaction equilibrim experiments, the viriation of oxygen content, inclusion compositions and inclusion sizes were studied. The effect of acid slag treatment on the transition mechanisms of D-type inclusions and the precipitation of TiN inclusions in GCr15 bearing steel were explored. The obtained results showed that the dominant inclusions in steel were plastic and smaller Al2O3-SiO2-MnO. The melting point were lower than 1400°C treated by the acid refining slag of 35.1%CaO-15%Al2O3-43.9%SiO2-6%MgO and there was no TiN found. The evolution of MgO·Al2O3 inclusio

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32

Zhang, Hongliang, Guanghong Feng, Xin Liu, Baoshan Wang, and Xuming Liu. "Effect of Sulfur Content on the Composition of Inclusions and MnS Precipitation Behavior in Bearing Steel." Metals 10, no. 5 (April 27, 2020): 570. http://dx.doi.org/10.3390/met10050570.

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MnS inclusions in bearing steel have long been considered to significantly affect the fatigue life of bearing steel. In this paper, the sizes of inclusions in bearing steel with different sulfur contents were analyzed and the precipitation behavior of MnS was calculated using thermodynamics. Furthermore, the positive role of MnS in bearing steel was discussed. Results showed that when the size of inclusions in bearing steel was increased, the proportion of MnS components in composite inclusions gradually decreased. When the sulfur content was increased, the shape of inclusions changed from a p

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33

Li, Weifu, Yi Wang, Weijian Wang, Ying Ren, and Lifeng Zhang. "Dependence of the Clogging Possibility of the Submerged Entry Nozzle during Steel Continuous Casting Process on the Liquid Fraction of Non-Metallic Inclusions in the Molten Al-Killed Ca-Treated Steel." Metals 10, no. 9 (September 8, 2020): 1205. http://dx.doi.org/10.3390/met10091205.

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In the current study, the nozzle clogging behavior and inclusion composition in Al-killed Ca-treated steels were observed to investigate the relationship between the liquid fraction of non-metallic inclusions and the clogging possibility of the submerged entry nozzle. Clogging materials were mainly MgO-Al2O3 with less than 20% liquid phases, while most of the inclusions were full liquid CaO-Al2O3-MgO in tundish at the casting temperature. Thus, it was proposed that the nozzle clogging can be effectively avoided by modification of solid inclusions to partial liquid ones rather than full liquid

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34

Li, Zhuang, Di Wu, Wei Lv, Zhen Zheng, and Shao Pu Kang. "Investigations on Low Environmental Impact Machining Processes of Free Cutting Austenitic Stainless Steels." Applied Mechanics and Materials 377 (August 2013): 112–16. http://dx.doi.org/10.4028/www.scientific.net/amm.377.112.

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In the present paper, sulfur, RE (rare earth) and bismuth were added to an austenite stainless steel. Low environmental impact machining processes of free cutting austenitic stainless steels was investigated by machinability testing. The results show that a significant amount of grey and dispersed inclusions were found in steel B. The inclusions are typical sulfide inclusions, and bismuth element is attached to double end of manganese sulfide inclusions. Some inclusions exhibit globular shape due to the presence of rare earths elements in steel B. Chip morphology was improved in steel B under

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Zhang, Yang, Li, and Wu. "Transformation of Oxide Inclusions in Stainless Steel Containing Yttrium during Isothermal Heating at 1473 K." Metals 9, no. 9 (September 1, 2019): 961. http://dx.doi.org/10.3390/met9090961.

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To provide fundamental information on the control of rare earth inclusions in solid steel, two 18 mass% Cr-8 mass% Ni stainless steels with different yttrium additions were prepared using an electric resistance furnace and the evolution of yttrium-based oxide inclusions during heat treatment of the steels at 1473 K was investigated. In both as-cast steels, homogeneous spherical Al-Y-Si(-Mn-Cr) oxide inclusions were observed; however, the steel with larger yttrium additions also had some heterogeneous oxide inclusions with double phases. After heating, a new oxide phase with higher yttrium cont

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Liu, Zhen, Bo Song, Zhanbing Yang, Xiaokang Cui, Longfei Li, Lei Wang, and Zirui Song. "Effect of Cerium Content on the Evolution of Inclusions and Formation of Acicular Ferrite in Ti-Mg-Killed EH36 Steel." Metals 10, no. 7 (June 29, 2020): 863. http://dx.doi.org/10.3390/met10070863.

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Ce has been widely used in oxide metallurgy for modifying inclusions and refining microstructure. Effect of Ce contents on the evolution and characteristics of non-metallic inclusions and the formation of acicular ferrite (AF) in Ce-treated Ti-Mg-killed EH36 steel was investigated. The results showed that the main type of inclusions in Ti-Mg deoxidized steel was MgO·Al2O3-MnS. After 0.014%, 0.024% and 0.037% Ce were added into the steels, dominant inclusions became CeAlO3-MgO-MnS, Ce2O2S-MgO-MnS and Ce2O2S-MnS, respectively. The precipitation of pure MnS was suppressed in the steel with 0.024%

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Liu, Yu, Dongwei Fan, Raymundo Arróyave, and Ankit Srivastava. "Microstructure-Based Modeling of the Effect of Inclusion on the Bendability of Advanced High Strength Dual-Phase Steels." Metals 11, no. 3 (March 5, 2021): 431. http://dx.doi.org/10.3390/met11030431.

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Advanced high strength dual-phase steels are one of the most widely sought-after structural materials for automotive applications. These high strength steels, however, are prone to fracture under bending-dominated manufacturing processes. Experimental observations suggest that the bendability of these steels is sensitive to the presence of subsurface non-metallic inclusions and the inclusions exhibit a rather discrete size effect on the bendability of these steels. Following this, we have carried out a series of microstructure-based finite element calculations of ductile fracture in an advance

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Wartiainen, Anna-Mari, Markus Harju, Satu Tamminen, Leena Määttä, Tuomas Alatarvas, and Juha Röning. "A tool for finding inclusion clusters in steel SEM specimens." Open Engineering 10, no. 1 (July 7, 2020): 642–48. http://dx.doi.org/10.1515/eng-2020-0068.

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AbstractNon-metallic inclusions, especially large or clustered inclusions, in steel are usually harmful. Thus, the microscopic analysis of test specimens is an important part of the quality control. This steel purity analysis produces a large amount of individual inclusion information for each test specimen. The interpretation of the results is laborious and the comparison of larger product groups practically impossible. The purpose of this study was to develop an easy-to-use tool for automatic interpretation of the SEM analysis to differentiate clustered and large inclusions information from

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Wu, Zhanfang, Zhenyu Liu, Shengtao Qiu, and Xiangyang Li. "Effect of composition and morphology of non-metallic inclusions on fracture toughness in as-cast AHSS." Metallurgical Research & Technology 116, no. 6 (2019): 623. http://dx.doi.org/10.1051/metal/2019052.

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A set of water-cooling copper-chill mold equipment is designed to study the precipitation behavior of different inclusion types in test steel under different cooling conditions, as well as its effects on the steel mechanical properties. As the results reveal, slow cooling treatment near the solidus temperature of test steel is conducive to forming more MnS + Al2O3 composite inclusions. The impact energy (−16 °C) of slow-cooled cast ingots at the core position is 28% higher than that of the air-cooled ingots. Scanning electron microscopy analysis of the specimens shows that small cracks are for

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Liu, Xiao, and Long Mei Wang. "Thermodynamic Analysis and Observation of Inclusions in 2205 Duplex Stainless Steel with Rare Earth Metals." Advanced Materials Research 512-515 (May 2012): 1833–39. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1833.

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The effect of rare earth metals on modifying inclusions of 2205 duplex stainless steel was studied by metallographic examination, SEM and electron spectroscopy. Thermodynamic calculation was used to analyze the formation of RE inclusions in 2205 duplex stainless steel. According to the composition of 2205 duplex stainless steel liquid and thermodynamic data, it may calculate and predict the kinds of RE inclusions. And the result shows that aluminosilicate complex inclusion and sulfide inclusion can be entirely replaced by RE2O2S and RES that are spherical.

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Wu, Guo Sheng, Zhi Yun Fu, and Zhong Wang. "Effects of Rare Earths on Inclusions Distribution and Modality of 8Cr4MoV Cold Work Roll Cast Steel." Advanced Materials Research 1049-1050 (October 2014): 171–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.171.

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A study of rare earth effects on inclusion modality of 8Cr4MoV cold work roll steels was carried out in the laboratory, the steels smelting by a 50kg vacuum induction furnace, atmospheric casting, processing sample after annealing, then inspecting the steels’microstructure, inclusion modality and composition; The results showed that the steels’ microstructure fine, micro-hardness increased with increasing rare earth content, while the average size of inclusions decreased significantly, also the morphology and composition of inclusions significantly changed from the angular black manganese sulf

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Lipiński, T., and A. Wach. "Size of Non-Metallic Inclusions in High-Grade Medium Carbon Steel." Archives of Foundry Engineering 14, no. 4 (December 1, 2014): 55–60. http://dx.doi.org/10.2478/afe-2014-0086.

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Abstract Non-metallic inclusions found in steel can affect its performance characteristics. Their impact depends not only on their quality, but also, among others, on their size and distribution in the steel volume. The literature mainly describes the results of tests on hard steels, particularly bearing steels. The amount of non-metallic inclusions found in steel with a medium carbon content melted under industrial conditions is rarely presented in the literature. The tested steel was melted in an electric arc furnace and then desulfurized and argonrefined. Seven typical industrial melts were

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Burja, Jaka, Mitja Koležnik, Barbara Šetina Batič, and Jožef Medved. "Effect of Zr Additions on Non-Metallic Inclusions in X11CrNiMo12 Steel." Metals 10, no. 9 (September 2, 2020): 1183. http://dx.doi.org/10.3390/met10091183.

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The production of clean steel is associated with high-quality steel grades for demanding applications. The formation of oxide inclusions mainly depends on the deoxidation practice; it is usually carried out through Al additions, but alumina inclusions can have detrimental effects. An alternative zirconium inclusion modification was used in a creep-resistant steel to improve the cleanliness of laboratory-made steel. The thermodynamics behind the inclusion modification are presented, the reaction products are identified and the steel cleanliness improvement is quantified. The resulting influence

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Chen, Liangjun, Yong Wan, Jie Li, Weiqing Chen, Yindong Yang, and Alexander McLean. "A New Method for Plasticization of Inclusions in Saw-Wire Steel by NaF Addition." Metals 10, no. 6 (May 27, 2020): 704. http://dx.doi.org/10.3390/met10060704.

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In this study, a new method is proposed for the plasticization of inclusions by taking advantage of the behavior of alkali metals in lowering the inclusion melting point. A series of experiments with NaF additions to molten steel were carried out using a carbon tube furnace followed by simulated rolling tests using the solidified ingots and characterization of inclusions with the help of automated scanning electron microscopy. Compositional changes of the steel and evolution of gaseous species were evaluated using thermodynamic software FactSage 7.2 (ThermFact Inc., Montreal, QC, Canada). Base

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Chen, Shao Chun, Rong Zhu, Li Qiu Xue, Teng Chang Lin, and Jing She Li. "Study on Properties and Inclusion of Environmental Automatic Steel Alloyed with Tin Element." Applied Mechanics and Materials 448-453 (October 2013): 88–93. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.88.

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A new environment-friendly automatic steel alloyed with tin element Y20Sn has been developed. In test, new steel possess good machinability and mechanical property, which reach Chinese National Standard of corresponding automatic steel GB/T8731-88. In steel, the shape of inclusions is mainly spherical or spindly, which volume is small and distribution is evenly. Such style of inclusion can fairly improve the steel machinability, and doesnt impair its mechanical property at the same time. As the main inclusion in developed automatic steel, MnS inclusion is one important factor which influences

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Shen, Ping, Lei Zhou, Qiankun Yang, Zhiqi Zeng, Kenan Ai, and Jianxun Fu. "Modification of MnS inclusion by tellurium in 38MnVS6 micro-alloyed steel." Metallurgical Research & Technology 117, no. 6 (2020): 615. http://dx.doi.org/10.1051/metal/2020066.

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In 38MnVS6 steel, the morphology of sulfide inclusion has a strong influence on the fatigue life and machinability of the steel. In most cases, the MnS inclusions show strip morphology after rolling, which significantly affects the steel quality. Usually, the MnS inclusion with a spherical morphology is the best morphology for the steel quality. In the present work, tellurium was applied to 38MnVS6 micro-alloyed steel to control the MnS inclusion. Trace tellurium was added into 38MnVS6 steel and the effect of Te on the morphology, composition, size and distribution of MnS inclusions were inves

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Liu, Yang, and Nanfu Zong. "Effects of Al-Mg alloy treatment on behavior and size of inclusions in SUH 409L stainless steel." Metallurgical Research & Technology 115, no. 1 (November 22, 2017): 111. http://dx.doi.org/10.1051/metal/2017085.

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Different types of steel were produced by different deoxidization processes to investigate effects of Al-Mg alloy treatment on the behavior and size of inclusions in stainless steels. Both industrial experiments and thermodynamic calculations were studied. Results showed that irregular and clustered Al2O3 inclusions are dominant in aluminum killed stainless steels. Using Al-Mg alloy treatment, size of Al2O3 inclusions could be reduced, irregular and clustered Al2O3 inclusions can be changed into the spherical MgO ⋅ Al2O3 inclusions. Changes in size and number of inclusions result from that Al-

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Zeng, Yan Ping, Shao Hua Li, and Ke Tong. "Micro-Behavior of Inclusions in X80 Pipeline Steel under Tensile Loading." Applied Mechanics and Materials 248 (December 2012): 224–30. http://dx.doi.org/10.4028/www.scientific.net/amm.248.224.

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Specially designed SEM in-situ tensile tests have been conducted to trace the entire process of crack initiation and propagation induced by inclusions in X80 pipeline steel. The main inclusions are complex oxides containing aluminum, calcium and magnesium with round or oval shape, and their sizes are in the range of 3~20μm. Cracks initiate firstly in inclusions and also easily initiate among inclusions if they distribute in the steel as an inclusion chain. The size of an inclusion has little effect on the initiation stress of the first crack, which mainly depends on the yield strength of the s

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Guo, Xipeng, Joel Godinez, Nicholas J. Walla, Armin K. Silaen, Helmut Oltmann, Vivek Thapliyal, Abhishek Bhansali, Eugene Pretorius, and Chenn Q. Zhou. "Computational Investigation of Inclusion Removal in the Steel-Refining Ladle Process." Processes 9, no. 6 (June 16, 2021): 1048. http://dx.doi.org/10.3390/pr9061048.

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In a steel-refining ladle, the properties of manufactured steel can be notably degraded due to the presence of excessive inclusions. Stirring via gas injection through a porous plug is often used as part of the steel-refining process to reduce these inclusions. In this paper, 3D computational fluid dynamics (CFD) modeling is used to analyze transient multiphase flow and inclusion removal in a gas-stirred ladle. The effects of gas stirring with bubble-inclusion interaction are analyzed using the Euler–Euler approach for multiphase flow modeling, while the effects of inclusions aggregation and r

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Kang, Jian, Yan-Chong Yu, Jin-Ling Zhang, Chao Chen, and She-Bin Wang. "Effect of rare earth on inclusion evolution in industrial production of HRB500E steel." Metallurgical Research & Technology 118, no. 2 (2021): 220. http://dx.doi.org/10.1051/metal/2021022.

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The effect of rare earth (RE) on inclusion in HRB500E steel was studied based on plant trials. The results showed that S decreased by 47.6% after 0.0059% RE treatment. In samples without RE treatment, the inclusions change from Al2O3-MnO to ellipsoidal Al2O3-MnO-CaO complex inclusion, and the size of such inclusions is ≤ 2 µm and isolated strip MnS inclusion with the size of ≥ 2 µm. With RE treatment, Al2O3-MnO-CaO inclusions are transformed into spherical or ellipsoidal REAlO3 and REAlO3-MnS. The size of such inclusions is ≈ 1.5 µm and single MnS inclusions were not found. The number density

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