Interfacial Properties of Molten Low Carbon Steel Containing Ti, Nb or B in Relation to the Behavior of Fine Particles in Continuous Casting Process

Mukai, Kusuhiro; Zhong, Liang‐Cai; Zeze, Masafumi

doi:10.2355/isijinternational.46.1810

Cited by 23 publications

(32 citation statements)

References 19 publications

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“…Eventually, data sets of both Ogino et al 8) and Gupt et al 9) are used for the calculation and PNS value was put as zero (influence of the interaction between nitrogen and sulfur on the surface tension was ignored). Then the parameters, PTi, PNb and PB were determined that make the equation for the surface tension give the best fit to the surface tension data for the multicomponent system which contain titanium, niobium and boron 3) as a function of concentration. Since the parameters PTi, PNb and PB were fixed in the final step, the influence of neglect for the interaction between nitrogen and sulfur (PNS=0), temperature difference and measurement errors were dumped into these parameters.…”

Section: Parameters For the Surface Tension Of Multicom-mentioning

confidence: 99%

“…The surface tension of pure iron at 1 873 K and 1 823 K were calculated from the literature data 5,7) and used for the fitting. After that, the other parameters, PTi, PNb and PB, were determined from the surface tension at 1 848 K for synthesized multicomponent alloy 3) by fitting the experimental values to the Eq. (3).…”

Section: Parameters For the Surface Tension Of Multicom-mentioning

confidence: 99%

“…The number of bubbles per m 2 was counted for the low carbon steel and the number of bubble per cm 3 was counted from the X-ray images for the 16Cr SUS. The number of bubbles were counted in a different way.…”

Section: The Number Of the Captured Bubbles In Continu-mentioning

confidence: 99%

“…ous Casting Strand To study the relationship between Mukai-value and the number of captured bubbles, the number of captured bubbles were counted for six different stainless steels (16Cr SUS) and three different low carbon steels which cast in continuous casting by Mukai et al [2][3][4] The composition of each steel grade are shown in Tables 1 and 2.…”

Section: The Number Of the Captured Bubbles In Continu-mentioning

confidence: 99%

“…2,3) In the previous works, it has become apparent that fine particles in the molten steel such as bubble are entrapped by solidifying interface during the solidification and remained in the final products. It is concluded that the surface tension gradient in the vicinity of solidification interface is a controlling factor of the bubble entrapment.…”

Section: Introductionmentioning

confidence: 99%

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Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

2013

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Surface tensions of low carbon slabs and 16 mass%Cr stainless steel were estimated using a surface thermodynamic model proposed by Mukai et al. As an application of the model, an index to evaluate the driving force for the fine bubble entrapment by the solidifying shell, the Mukai-value, M, was calculated from the surface tension values. The relationship between Mukai-value and number of entrapped bubbles was discussed. A linear relationship was found between the number of captured bubbles and Mukaivalue. In the previous work, the Mukai-value was used as a relative scale to evaluate the driving force for the movement of bubbles. However, by calculating the M from the surface tension values by the surface thermodynamic model, physically reasonable Mukai-values could be obtained.

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Section: Parameters For the Surface Tension Of Multicom-mentioning

confidence: 99%

Section: Parameters For the Surface Tension Of Multicom-mentioning

confidence: 99%

Section: The Number Of the Captured Bubbles In Continu-mentioning

confidence: 99%

Section: The Number Of the Captured Bubbles In Continu-mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

2013

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The Wetting Behavior of CrMnNi Steel on Mg‐PSZ as a Function of Phosphorous, Sulphur and Titanium Content

Dubberstein

Heller

Wenzel

et al. 2016

Advances in Molten Slags, Fluxes, and Salts

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Activation Mechanism and Infiltration Kinetic for Pressureless Melt Infiltration of Ti Activated Al₂O₃ Preforms by High Melting Alloy

Vasic¹,

Grobéty²,

Kuebler³

et al. 2009

Adv Eng Mater

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Metal matrix composites (MMC) represent a class of materials of broad technological and commercial significance designed for applications where the contrasting material properties of both metals and ceramics are needed. [1] MMC combine the high strength and wear resistance of ceramics with the ductility as well as the thermal and electrical conductivity of metals. The ceramic phase within the metal matrix guarantees a failure-tolerant behavior and low thermal expansion. [2] Many fabrication routes have been described in previous studies, [3] the most important ones are pressureless and pressure assisted metal melt infiltration techniques as well as powder metallurgical methods. The choice of a suitable manufacturing route is conditioned by cost factors, form flexibility and production temperature, [3,4] For certain applications in the food, pharmaceutical and automotive industry, the required properties are best met by composites made of alumina (Al 2 O 3 ) and high-melting Fe-based alloys (>1400 8C) such as X3CrNi13-4. [5][6][7][8][9] Pressureless infiltration would be the manufacturing route of choice for many of these applications, but the alumina-steel system lacks an important prerequisite, that makes infiltration without pressure possible: Oxide ceramics in general, due to their ionic character, show bad wettability by metal melts. The equilibrium contact angle u Y , which depends on the surface tensions of the phases involved, is given by Young's equation [10][11][12] (Eq. 1):and is in general well over 908 for such systems. [13][14][15][16] It is therefore not surprising that steel melts do not wet alumina surfaces.Pressure assisted infiltration and previous activation of the metal and/or the ceramic preform by incorporating reactive metals like titanium (Ti) are the two methods at disposal to circumvent the wettability problem. [2,7] Moreover, it was shown that a pressure drop within preforms, caused by the reaction of reactive metals such as e.g. Ni, Ti or Al and thus generation of a vacuum atmosphere is favorable for successful infiltration. [17] Applying pressure to the melt allows overcoming the negative capillary forces, but the pressurizing systems are technically demanding. The addition of a reactive element such as Ti enhances the infiltration performance either by lowering the surface tension of the metal melt and/or by the reactive modification of the ceramic surface. [18] It is well known that the addition of Ti to brazing solders for joining ceramic components lowers the contact angle of the metal melt with alumina due to the formation of a reactive layer. [19,20] Addition of titanium to steel melts lowers the surface tension, although there is a large spread in the data which are due to the presence or absence of surface active species in the gas phase. The formation of a TiO x reactive layer, and also modification of fluid flow and active metal adsorption are additional mechanisms that have been postulated to enhance wettability. [21,22] The activator may be prealloyed into the metal or dis...

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Interfacial Properties of Molten Low Carbon Steel Containing Ti, Nb or B in Relation to the Behavior of Fine Particles in Continuous Casting Process

Cited by 23 publications

References 19 publications

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

The Wetting Behavior of CrMnNi Steel on Mg‐PSZ as a Function of Phosphorous, Sulphur and Titanium Content

Activation Mechanism and Infiltration Kinetic for Pressureless Melt Infiltration of Ti Activated Al₂O₃ Preforms by High Melting Alloy

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Interfacial Properties of Molten Low Carbon Steel Containing Ti, Nb or B in Relation to the Behavior of Fine Particles in Continuous Casting Process

Cited by 23 publications

References 19 publications

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

The Wetting Behavior of CrMnNi Steel on Mg‐PSZ as a Function of Phosphorous, Sulphur and Titanium Content

Activation Mechanism and Infiltration Kinetic for Pressureless Melt Infiltration of Ti Activated Al2O3 Preforms by High Melting Alloy

Contact Info

Product

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Activation Mechanism and Infiltration Kinetic for Pressureless Melt Infiltration of Ti Activated Al₂O₃ Preforms by High Melting Alloy