Effect of Inclusions’ Behavior on the Microstructure in Al-Ti Deoxidized and Magnesium-Treated Steel with Different Aluminum Contents

Wu, Zhenhua; Zheng, Wan; Li, Guangqiang; Matsuura, Hiroyuki; Tsukihashi, Fumitaka

doi:10.1007/s11663-015-0311-4

Cited by 87 publications

(40 citation statements)

References 46 publications

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“…It is well established that the increment of the dispersed fine particles enhances the formation of AF . Nako et al and Oh et al also stated that the AF content was in proportion to the number density of inclusions, whereas the types of inclusions are the dominant factors for the nucleation of AF and the composition of inclusions affect the AF formation mainly by the mechanisms, such as 1) the lattice mismatch between the inclusions and matrix metal and 2) Mn‐depleted zone (MDZ) near the inclusions . TiN, MgAlO 4 , and Ti–RE–Zr promote AF nucleation on account of their excellent coherency with α‐ferrite.…”

Section: Introductionmentioning

confidence: 99%

“…TiN, MgAlO 4 , and Ti–RE–Zr promote AF nucleation on account of their excellent coherency with α‐ferrite. TiN–MnS, Al 2 O 3 –TiO x –MgO–MnS, and Ti–Zr–O–MnS induce AF nucleation because of the MDZ that formed due to the precipitation of MnS. However, MDZ also formed without MnS, due to diffusion of manganese ions into Ti oxides .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Cui

Song

Yang

et al. 2020

steel research int.

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The size distribution and compositions of inclusions and microstructures in steels with different Mg contents are systematically investigated. The results show that Mg treatment modified and refined the inclusions. With Mg addition, the dominant inclusions in the samples evolve from LaAlO3 with MnS to a Mg‐enriched core enwrapped by a La‐enriched shell with MnS. While the Mg content increases from 11 to 66 ppm, the core changes from MgO·Al2O3 to MgO, and the shell develops from LaAlO3 to La2O2S. With the increase in Mg content from 0 to 44 ppm, the number density of effective inclusions is improved, and the proportion of acicular ferrite (AF) increases from 15% to 39%. However, the AF fraction decreases to 16% due to the relatively low amount of effective inclusions in the sample Mg3 with 66 ppm Mg.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Cui

Song

Yang

et al. 2020

steel research int.

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“…As is known to all, the inclusions in steel will significantly influence the performance of the final product. For instance, oxide inclusions have adverse effect on the toughness, ductility and fatigability of steel and cause micro-voids or cracks at the interface between the matrix of steel and inclusions [5][6][7][8][9][10]. Generally speaking, the decrease of the number and size of inclusions would lead to an extension of service life for steel [11].…”

Section: Introductionmentioning

confidence: 99%

Role of slag on inclusions control and its effect on primary carbides in H13 steel

Wang

Liu

et al. 2020

Metall. Res. Technol.

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The relationship of inclusions and primary carbides in H13 ingot processed by ESR with ANF-6 slag was investigated. It is found that inclusions in H13 ESR ingot are Al2O3, MnS and calcium-aluminate inclusions. The Al2O3 and MnS inclusions are found to be the nucleation cores of the primary carbides, whereas the calcium-aluminate inclusions are not. In order to study the effect of slag on inclusions and primary carbides of H13 steel further, the characteristics of inclusions and primary carbides in steel remelted by ANF-6 and ANF-8 slags were analyzed, and compared to the steel remelted without slag. After being remelted with the ANF-6 (70 mass% CaF2 + 30 mass% Al2O3) and ANF-8 (60 mass% CaF2 + 20 mass% CaO + 20 mass% Al2O3) slags, Al2O3 and CaO contents in calcium-aluminate inclusions increase, respectively. The ANF-8 slag shows stronger desulfurization ability than ANF-6 slag, which contributes to the delay of MnS inclusions precipitation and the decrease of inclusion number, and finally helps to inhibit the precipitation of primary carbides. It implies that the ANF-8 is the promising slag for the ESR process of H13 steel.

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“…Zhang et al discussed the inclusion evolution under Al–Ca combined deoxidation. Ono et al and Wu et al studied inclusion generation under Al–Ti–Mg deoxidation.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Impact of Deoxidation Methods on the Fatigue Properties of Bearing Steels

Bao

Gan

et al. 2018

steel research int.

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Strong deoxidation and weak deoxidation are two kinds of deoxidation methods frequently applied in steelmaking. In the present study, high‐carbon chromium bearing steels are smelted with a strong deoxidizer and a weak deoxidizer, respectively in industrial trials. The generation mechanism of inclusions is analyzed, and the inclusion stability diagrams of the Fe–Si–Al–Mg–Mn–O system at 1873 and 1843 K are calculated. The very high cycle fatigue life of bearing steels deoxidized with different deoxidizers is also experimentally compared. The results showed that the evolution routes of inclusion in high‐carbon chromium bearing steels deoxidized by Si and Al are CaO–Al2O3–SiO2 → CaO–Al2O3–SiO2–MgO and Al2O3 → CaO–Al2O3–SiO2–MgO, respectively. The Al content in steel is controlled by different methods when different deoxidizers are applied. The effect of the oxide inclusions generated during Si deoxidization on the fatigue life is lower than that during Al deoxidization, even if the total oxygen content is slightly higher. This effect suggests that it is not accurate to evaluate the fatigue life of steels with the total oxygen content, and it is also desirable to produce bearing steels with the Si deoxidation method.

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Effect of Inclusions’ Behavior on the Microstructure in Al-Ti Deoxidized and Magnesium-Treated Steel with Different Aluminum Contents

Cited by 87 publications

References 46 publications

Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Effect of Mg on the Evolution of Inclusions and Formation of Acicular Ferrite in La–Ti‐Treated Steels

Role of slag on inclusions control and its effect on primary carbides in H13 steel

An Experimental Study on the Impact of Deoxidation Methods on the Fatigue Properties of Bearing Steels

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