Effects of rare earth on inclusions and corrosion resistance of 10PCuRE weathering steel

Yue, Lijie; Wang, Longmei; Han, Jinsheng

doi:10.1016/s1002-0721(09)60219-2

Cited by 86 publications

(35 citation statements)

References 3 publications

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“…The MgO · Al 2 O 3 inclusion could not be completely modified into Ce–O or Ce–O–S inclusions with low cerium content in the molten steel. However, the performances of steels would deteriorate when the cerium content is too high in molten steel . Therefore, it is necessary to build a prediction model to calculate the optimum cerium content in molten steel so that the MgO · Al 2 O 3 inclusion are just completely modified to Ce–O or Ce–O–S.…”

Section: Discussionmentioning

confidence: 99%

“…However, the performances of steels would deteriorate when the cerium content is too high in molten steel. [34][35][36] Therefore, it is necessary to build a prediction model to calculate the optimum cerium content in molten steel so that the MgO Á Al 2 O 3 inclusion are just completely modified to Ce-O or Ce-O-S. As shown in Figure 11, the Equilib model in Factsage 7.0 could be effectively used to calculate the optimum cerium content that needs to be add to molten steel. At the same time, more industrial experiments should be conducted to confirm the calculated results.…”

Section: Evolution Process Of Ce On Mgo á Al 2 Omentioning

confidence: 99%

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Effect of Cerium on the Behavior of Inclusions in H13 Steel

Huang

Cheng

et al. 2018

steel research int.

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The modification mechanism of cerium (Ce) on oxides and multilayer carbontrides in H13 steel is investigated by industrial trials and thermodynamic calculations. The morphology, composition, and size of inclusions are analyzed by scanning electron microscopy and energy dispersive spectroscopy. The main inclusions in H13 steel without Ce content in the molten steel are MgAl2O4 spinel inclusions and multilayer carbonitrides. The carbonitrides have a multilayer structure in which MgAl2O4 acts as the nucleation core and the second layer is (Ti, V)(C, N). As the cerium content in molten steel increases from 0 to 0.03 wt%, the MgAl2O4 is effectively modified into cerium oxide (Ce–O) and cerium oxy‐sulfide (Ce–O–S), and the evolutionary process is as follows: MgAl2O4 → CeAlO3 → Ce–O and Ce–O–S. Likewise, the structure of multilayer carbonitrides in the H13 steel also changed. The MgAl2O4 and CeAlO3 act as heterogeneous nucleation cores of multilayer carbonitrides. However, Ce–O and Ce–O–S can effectively inhibit the heterogeneous nucleation of carbonitrides. The number density of large‐size carbontrides is remarkably reduced with increasing Ce content. A prediction model of optimum Ce content in molten steel is built, which has remarkable agreement with the experimental observations.

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Section: Discussionmentioning

confidence: 99%

Section: Evolution Process Of Ce On Mgo á Al 2 Omentioning

confidence: 99%

Effect of Cerium on the Behavior of Inclusions in H13 Steel

Huang

Cheng

et al. 2018

steel research int.

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“…Lanthanum exists in the form of rare earth inclusions, rare earth compounds, and solid solution in steels. 7 Rare earth elements can completely dis- solve in molten steel, and the solid solubility in the solid iron is low (<10 ppm). The atomic radius of La and Fe is 0.1877 nm and 0.1210 nm, respectively.…”

Section: Effects Of La On the Microstructure And Mechanical Propertiesmentioning

confidence: 99%

“…Non-metallic inclusions with different morphologies, distribution, and sizes have different effects on the properties of the steel. [1][2][3][4] The addition of rare earth could clean the molten steels, [5][6][7][8][9] remove the gas in the molten steel, reduce the amount of phosphorus and sulfur, and improve the morphology, distribution, and size of non-metallic inclusions. Meanwhile, the addition of rare earth could also refine the crystals, prevent the production of dendritic segregation, and increase the mobility of molten steel, so the properties of casting can be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lanthanum on Microstructures and Properties of ASTM A216 Steel

Wang

et al. 2016

Kem. Ind.

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In order to satisfy the rudder horn casting standards of the International Association of Classification Societies, the properties of ASTM A216 steel should be improved. Therefore, in this article the rudder horn casting and accompanying specimens were cast moulded by arc furnace smelting, external refining, and modification treatment of the molten steel by lanthanum. The samples were first underwent normalizing treatment at 900 °C for 10 hours, then air cooled, followed by tempering treatment at 600 °C for 7 hours and samples were air cooled again. The mechanical properties and microstructures of the samples were measured. The crystallography relationships between lanthanum compounds formed in the molten steel and primary δ-Fe were analysed. The nucleation effect of lanthanum compounds as a heterogeneous nucleation core of primary δ-Fe were calculated and discussed based on two-dimensional mismatch theory. The results indicated that the strip MnS inclusions in ASTM A216 steel became granular rare earth compound inclusions due to La. The refined microstructures were obtained by a synergistic effect of the enhanced condensate depression and the nucleation rate of melt and La compounds as the heterogeneous nucleation caused by La.

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“…There have been a number of researches pertaining to the application of REM elements in molten steel. Substantial improvements have been achieved in mechanical properties due to the modifications of the morphology and size of inclusions [16][17][18][19][20][21][22][23][24][25][26]. However, the purity of steel can be declined and some important properties deteriorated when the REM addition technology is improperly used, such as the unreasonable amounts of REM addition, which will eventually affect the application of REM in the steel.…”

Section: Introductionmentioning

confidence: 99%

Effects of Rare Earth on the Microstructure and Impact Toughness of H13 Steel

Gao

Liu

et al. 2015

Metals

108

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Studies of H13 steel suggest that under appropriate conditions, additions of rare-earth metals (REM) can significantly enhance mechanical properties, such as impact toughness. This improvement is apparently due to the formation of finer and more dispersive RE inclusions and grain refinement after REM additions. In this present work, the microstructure evolution and mechanical properties of H13 steel with rare earth additions (0, 0.015, 0.025 and 0.1 wt.%) were investigated. The grain size, inclusions and fracture morphology were systematically studied by means of optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicate that REM addition of 0.015 wt.% can result in good improvement of performance compared to the REM additions of 0.025 wt.% and 0.1 wt.%. It is found that the impact toughness is significantly enhanced with the addition of 0.015% REM, which can be improved 90% from 10 J to 19 J. Such an addition of REM can result in a huge volume fraction of finer and more dispersive inclusions which are extremely good to toughness.

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Effects of rare earth on inclusions and corrosion resistance of 10PCuRE weathering steel

Cited by 86 publications

References 3 publications

Effect of Cerium on the Behavior of Inclusions in H13 Steel

Effect of Cerium on the Behavior of Inclusions in H13 Steel

Effect of Lanthanum on Microstructures and Properties of ASTM A216 Steel

Effects of Rare Earth on the Microstructure and Impact Toughness of H13 Steel

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