Microstructure Evolution of RE Rail Steel During Hot Deformation

Cen, Yaodong; Ji, Chunjiao; Chen, Lin; Chen, Kunyu; Ke, Dandan

doi:10.1007/s13632-023-00926-6

Cited by 2 publications

(2 citation statements)

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“…The smelting steps of the experimental steel are as follows: (1) The iron rod required for smelting the test steel is placed into the crucible, and the rare earth Ce, ferrosilicon, ferromanganese and ferrovanadium alloys are placed into the secondary charging device. (2) In order to eliminate the impact of impurities in the air, the vacuum furnace is vacuumed first and then filled with high purity argon.…”

Section: Experimental Methods 21 Preparation Of Experimental Steelmentioning

confidence: 99%

“…As an important component of railway tracks, heavy rail steel needs to withstand the huge pressure, impact and wear of the wheel, so more attention should be paid to its mechanical properties whilst ensuring the output of heavy rail steel [1,2]. As one of the important factors that reduces the mechanical properties of steel, the quantity, size, distribution and chemical composition of nonmetallic inclusions seriously affect the continuity of the steel matrix and lead to the decline of its mechanical properties [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Study on Influence of Rare Earth Ce on Micro and Macro Properties of U75V Steel

Feng,

Ren,

Yang

2024

Materials

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Non-metallic inclusions in steel have great influence on the continuity of the steel matrix and the mechanical properties of steel. The precipitation sequence of Ce inclusions in molten steel is predicted by thermodynamic calculations. The results show that Ce content will affect the precipitation sequence of rare earth inclusions in molten steel, and the formation of CeO2, Ce2O3 and CeAlO3 will be inhibited with the increase in Ce content. Our laboratory smelted the test steel without rare earth additive and the test steel with rare earth Ce additive (0.0008%, 0.0013%, 0.0032%, 0.0042%). It was found that the MnS inclusions and inclusions containing Al, Ca, Mg and Si oxides or sulfides in the steel after rare earth addition were modified into complex inclusions containing CeAlO3 and Ce2O2S. The size of inclusion in steel was reduced and the aspect ratio of inclusion was improved. The addition of Ce also improved the grain size of U75V steel and significantly refined the pearlite lamellar spacing. After mechanical property testing of the test steel, it was found that when Ce is increased within 0.0042%, the tensile and impact properties of U75V steel are also improved.

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Section: Experimental Methods 21 Preparation Of Experimental Steelmentioning

confidence: 99%