Deformability of Oxide Inclusions in Tire Cord Steels

Zhang, Lifeng; Guo, Changbo; Yang, Wen; Ren, Ying; Ling, Haitao

doi:10.1007/s11663-017-1134-2

Cited by 64 publications

(43 citation statements)

References 29 publications

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“…When the generated [Mg] diffuses into the melt, it will react with the residual Al 2 O 3 or [Al] to form MgO-Al 2 O 3 type spinel in the LAHC and HALC steels, shown as Reaction (3) or (4). In the high C steel with ultra-low Al content ([Al] < 0.0010%, corresponding to the group of ULAHC), [Mg] and [O] will react with each other directly to generate pure MgO in the melt, shown as Reaction (5). In the high Al low C steel ([Al] > 0.01%, C < 0.006%, corresponding to the group of HALC), [Mg] is mainly generated by the reduction of MgO in slag or refractory by [Al], shown as Reaction (2).…”

Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

“…The inclusions in the group of HALC were consisted of a spinel core and a pure MgO surrounding layer. Accordingly, inside the high Al low C molten steel, Reaction (3) or Reaction (4) occurs first, then, when the MgO in spinel reaches saturation, pure MgO will be formed on the surface of spinel according to Reaction (5) or Reaction (6). Based on the aforementioned analysis, MgO-containing inclusions are originated from the reduction of MgO in refractory or slag by carbon in the situation of high carbon steel or by aluminum when the Al content in steel reaches tens of ppm.…”

Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

“…Most of the inclusions would be removed by Stokes floatation, bubble floatation [2,3], refractory adhesion or slag absorption. The remained inclusions in steel are usually detrimental to steel properties depend on the quantity, size and composition of inclusions [4,5]. One of the most important ways to decrease the detrimental effect is reducing the inclusion size and controlling the inclusion composition [4].…”

Section: Introductionmentioning

confidence: 99%

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Formation Mechanism of MgO Containing Inclusions in the Molten Steel Refined in MgO Refractory Crucibles

Yang

Zhang

2020

Metals

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In order to study the influence of MgO refractory on inclusions during the steelmaking process, laboratory quasi-equilibrium experiments were performed in MgO crucibles at 1873 K. It was found that there were no MgO-containing inclusions formed when ultra-low Al ultra-low C steel was used. When the contents of dissolved Al and C in steel changed, different composition ranges led to different types of inclusions. It was shown as well that for both low Al high C steel and high Al low C steel, the order of average MgO content in inclusions from large to small was: MgO-10% slag addition > MgO-free slag addition > no slag addition. Based on the results, a simple formation mechanism of MgO-containing inclusions in the steel with different compositions in MgO crucibles was proposed. The results could provide guidance for the reduction of MgO-containing inclusions in the industrial production of steels.

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Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

Section: Formation Mechanism Of Mgo-containing Inclusionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formation Mechanism of MgO Containing Inclusions in the Molten Steel Refined in MgO Refractory Crucibles

Yang

Zhang

2020

Metals

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“…On the other hand, there are still some problems that plagued metallurgical workers for many years, but which the subjects of new research and breakthroughs in recent years [9][10][11][12][13]. For example, in terms of the formation mechanism and evolution of SiO 2 -type inclusions in Si-Mn killed steel wires, Wang et al [9,10] found, in 2015, that the formation mechanism of SiO 2 -type inclusions in wire rods involves two main steps: First, solid SiO 2 phase precipitates form MnO-SiO 2 -Al 2 O 3 system inclusions during the casting process to form dual-phase inclusions in the as-cast bloom, and second, dual-phase inclusions experience phase separation during the rolling process for heterogeneity and In this experiment, the temperature of liquid metal is continuously measured by means of a B-type reference thermocouple.…”

Section: Introductionmentioning

confidence: 99%

Effect of Na2O and Rb2O on Inclusion Removal in C96V Saw Wire Steels Using Low-Basicity LF (Ladle Furnace) Refining Slags

Chen

Sun

et al. 2018

Metals

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Inclusion removal and modification of C96V saw wire steel using Na 2 O-and Rb 2 Ocontaining novel low-basicity LF (ladle furnace) Refining Slags have been researched. The results indicated that the addition of Na 2 O deteriorates inclusion removal; by contrast, the addition of Rb 2 O seems to significantly enhance inclusion removal. In detail, Rb 2 O can improve the cleanliness in the as-quenched C96V saw wire steel melts compared to preexisting synthetic LF refining slag compositions: (i) The average inclusion diameter experienced a remarkable decrease after reaction between the liquid steel and the synthetic LF refining slag; (ii) In addition, the number of inclusions also suffered from a dramatic decrease, with the reaction time increasing from 900 to 2700 s (15·to 45 min); (iii) Furthermore, both of the MnO-SiO 2 -Al 2 O 3 and CaO-SiO 2 -Al 2 O 3 inclusion system mainly concentrated in the low melting zone when the composition of Rb 2 O in synthetic refining slag was ≥5.0 wt%. This is mainly because Na 2 O significantly reduces the viscosity of refining slag, while Rb 2 O increases it. Then, there are two remarkable influences causing the increase of viscosity of refining slag with the addition of Rb 2 O: the inclusions can be sufficiently entrained within the slag once absorbed due to the significant increase in the viscosity; and the slag entrapment during refining process weakened dramatically.

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State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Chen

Zheng

et al. 2019

steel research int.

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Non-metallic inclusions in tire cord steels and saw wire steels often act as breakage source during cold drawing and standing process. In this work, the control of inclusions in tire cord steels and saw wire steels in the production process are extensively reviewed. On the one hand, the new perspectives on the problems left over in the past have been discussed comprehensively, include the new understanding of the origins of SiO 2 -CaO-Al 2 O 3 system inclusions, the new found of evolution of inclusions in cord steel and saw wire steel during rolling and drawing process, and the new understanding of controlling the plasticity of inclusions. On the other hand, the new approaches of controlling inclusions in tire cord steels and saw wire steels have also been discussed, include alkali oxides treatment, boron treatment, Mg treatment and cerium treatment. R 2 O (R ¼ K, Rb, Cs) containing refining slag can significantly improve the cleanliness of saw wire steels and saw wire steels. Adding alkali oxides, boron or Mg into molten steel can dramatically improve the deformability of inclusions through expanding the acreage of the region with low melting points. The basicity of top slag at the range of 1.1-1.2, and ωAl 2 O 3 in top slag around 3 wt% in order to control the composition of inclusions in the region with low melting points when ZrO 2 -based refractory be used to reduced the pure Al 2 O 3 inclusions in tire cord steel. Finally, the unsolved problems are summarized.

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Deformability of Oxide Inclusions in Tire Cord Steels

Cited by 64 publications

References 29 publications

Formation Mechanism of MgO Containing Inclusions in the Molten Steel Refined in MgO Refractory Crucibles

Formation Mechanism of MgO Containing Inclusions in the Molten Steel Refined in MgO Refractory Crucibles

Effect of Na2O and Rb2O on Inclusion Removal in C96V Saw Wire Steels Using Low-Basicity LF (Ladle Furnace) Refining Slags

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

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