Influence of inclusions modification on nozzle clogging
8 J. H. Park H. Todoroki Control of MgO·Al2O3 Spinel Inclusions in Stainless Steels. ISIJ International 50 10 (2010). 9 J. H. Park Formation Mechanism of Spinel-Type Inclusions in High-Alloyed Stainless Steel Melts. Metallurgical and Materials Transactions B 38B (2007).
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Deoxidation and Inclusion Control in Stainless Steel
Abstract The effects of deoxidization and wire feeding operation on the type of titanium magnesium and aluminum spinel compound inclusion were investigated in 409L stainless steel production process. Further the formation mechanism of the compound inclusion was also researched at the same time.
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Influence of inclusions modification on nozzle clogging
8 J. H. Park H. Todoroki Control of MgO·Al2O3 Spinel Inclusions in Stainless Steels. ISIJ International 50 10 (2010). 9 J. H. Park Formation Mechanism of Spinel-Type Inclusions in High-Alloyed Stainless Steel Melts. Metallurgical and Materials Transactions B 38B (2007).
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Thermochemical stability of spinel (MgO·Al2O3) under
Aug 01 2004 · The reaction of MgO and Al 2 O 3 to form spinel is accompanied by a volume expansion of approximately 5 this volume expansion stops the formation of high density materials therefore an intermediate calcination operation is necesary to obtain high density spinel bodies.
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Study on MgO-Al2O3-TiO2 Inclusion in 409L Stainless Steel
The effects of deoxidization and wire feeding operation on the type of titanium magnesium and aluminum spinel compound inclusion were investigated in 409L stainless steel production process. Further the formation mechanism of the compound inclusion was also researched at the same time. The results show that the spherical compound inclusion formed in molten steel presents clearly hierarchy
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Modification and Minimization of Spinel(Al2O3·xMgO
The inclusion content of steel samples was analyzed to improve the understanding of fundamentals of Al2O3·xMgO spinel inclusion formation. The optimum processing conditions for Ca treatment and Ti addition in austenitic stainless steel melts to achieve the minimized spinel formation and the maximized Ti-alloying yield is discussed.
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Deoxidation and Inclusion Control in Stainless Steel
Abstract The effects of deoxidization and wire feeding operation on the type of titanium magnesium and aluminum spinel compound inclusion were investigated in 409L stainless steel production process. Further the formation mechanism of the compound inclusion was also researched at the same time.
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(PDF) Control of MgO·Al2O3 Spinel Inclusions in Stainless
The latest publications regarding the development of technology to control inclusion compositions focusing on MgO. Al2O3 spinel inclusions were summarized in this review article. The problems
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Non-Metallic Inclusions in SteelsMicro Inclusions
3D non-metallic inclusion morphology observed in deep etched steels. A MnO/TiO2/Al2O3 complex inclusion in SUS 304 stainless steel. A SEM image of a fatigue crack initiating aluminium oxide inclusion on the fracture surface of a fatigue specimen. A cluster of aluminate inclusions
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THE MODIFICATION AND MINIMIZATION OF SPINEL
stainless steel deoxidized with Al on the formation of spinel inclusions were investigated. Ca and Ti additions after Al deoxidation were performed in the order of Ca treatment → Ti alloying and vice versa. The inclusion chemistry and morphology according to those sequential orders are discussed from the standpoint of spinel formation.
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Control of MgO·Al 2 O 3 Spinel Inclusions during
Dec 21 2012 · The effect of calcium treatment and/or aluminum-based deoxidant addition on the oxygen control and modification of MgO·Al2O3 spinel inclusions during protective gas electroslag remelting (P-ESR) of H13 die steel with low oxygen content was experimentally studied. It is found that all the inclusions in the consumable electrode are MgO·Al2O3 spinels besides a few MgO·Al2O3 spinels
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HiteP2
State-of-the-art in control of MgO Al2O3 spinel inclusions in stainless steel industries Solutions manual (invited lecture) 12) J.H. Park Department of Metallurgy and Materials Engineering Katholieke Universiteit Leuven (KUL) 11 Jun. 2010 Leuven BELGIUM. Impact of Slag Fundamentals on Steelmaking Processes (invited seminar)
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Study on MgO-Al2O3-TiO2 Inclusion in 409L Stainless Steel
The effects of deoxidization and wire feeding operation on the type of titanium magnesium and aluminum spinel compound inclusion were investigated in 409L stainless steel production process. Further the formation mechanism of the compound inclusion was also researched at the same time. The results show that the spherical compound inclusion formed in molten steel presents clearly hierarchy
Get PriceSpinel inclusions in type 304 stainless steel
In this study inclusions in molten type 304 stainless steel at each successive reactor which were AOD LF and tundish were investigated in order to control the formation of the spinel in type 304 stainless steel slab. The formation of the spinel inclusions in the slab was discussed from the viewpoint of the effect of slag composition.
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Control of MgO·Al2O3 Spinel Inclusions during Protective
The effect of calcium treatment and/or aluminum-based deoxidant addition on the oxygen control and modification of MgO·Al2O3 spinel inclusions during protective gas electroslag remelting (P-ESR) of
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Formation of MgO·Al2O3 Inclusions in High Strength
3 spinel inclusions have been widely discussed in recent years. Most of the reports focused on the formation and the control technology of MgO·Al 2 O 3 inclusions in stainless steels because MgO·Al 2 O 3 damages the surface quality of stainless steels 7–9) while those in high strength alloyed structural steels are rarely seen. Quite dif-
Get PriceFormation and evolution of Spinel in aluminum killed
Magnesium aluminate (Spinel) inclusions have been observed to cause hook crack in line pipe steels. These inclusions are typically formed during liquid steel processing at the ladle metallurgy furnace (LMF) and subsequently modified by calcium to form less harmful liquid inclusions. Unfortunately spinel inclusions are still sometimes observed in
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THERMODYNAMIC IMPACT OF MOLTEN SLAGS ON THE
mechanism of spinel inclusions in Ti-free 16 wt Cr ferritic stainless steel have been in-vestigated by Park and Kim 6 and Okuyama et al. 7 respectively. In the former study the more basic slag (CaO or MgO saturation) equilibrated with the molten steel the more MgO-rich spinel inclusions
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Effect of Phase Solidification Sequence in Stainless Steel
formation of titanium nitrides (TiN) on preexisting (MgO·Al2O3) spinel inclusions using a controlled sequence of melt additions prior to casting. This co-precipitation is favorable because the lattice disregistry between spinel and TiN is low (5.1 ). T
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Formation of MgO·Al2O3 Inclusions in High Strength
3 spinel inclusions have been widely discussed in recent years. Most of the reports focused on the formation and the control technology of MgO·Al 2 O 3 inclusions in stainless steels because MgO·Al 2 O 3 damages the surface quality of stainless steels 7–9) while those in high strength alloyed structural steels are rarely seen. Quite dif-
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Non-Metallic Inclusions in SteelsSpinel Inclusions
Automated non-metallic inclusion analysis in LCAK steel. BN (Fe Cr)3O4 FeO Cr2O3 phases in 9Cr3W3CoVNbBN steel. BSE image and elemental mapping of an industrial stainless steel slag. BSE image of a slag sample containing 1) liquid and spinel 2) liquid spinel and SiO2 and 3)
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Inclusion control for clean steelSlideShare
Jan 15 2014 · 30. i) Control of inclusion during tapping of steel Carry-over slag to be minimizedCarry over of 1 kg FeO in slag decrease Al by 0.286 kg which in turn forms 0.51 kgAl2O3No. of inclusion are 240 per kg of carry over FeO of slag ii) Control of inclusion during treatment of steel Stirring of steel bath accelerate the inclusion float to
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Behavior of MgO • Al2O3 Based Inclusions in Alloy Steel
Jul 01 2010 · The transformation of MgO • Al 2 O 3 based inclusions in alloy steel during refining has been studied by industrial trials. Besides Factsage software is used to study the formation and modification of spinel inclusions in alloy steel using calcium treatment during refining process. The results show that the transformation sequence of
Get PriceSpinel inclusions in type 304 stainless steel
In this study inclusions in molten type 304 stainless steel at each successive reactor which were AOD LF and tundish were investigated in order to control the formation of the spinel in type 304 stainless steel slab. The formation of the spinel inclusions in the slab was discussed from the viewpoint of the effect of slag composition.
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Evolution of oxide inclusions in stainless steel
May 01 2020 · To get more fundamental information on the control of rare earth inclusions in solid steel the evolution behavior of oxide inclusions during thermo-mechanical treatment of stainless steel containing yttrium at 1423 K (1150 °C) was investigated in detail.Homogeneous spherical SiO 2 –MnO–Al 2 O 3 –Y 2 O 3 inclusions were observed in the as-cast steel.
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Non-Metallic Inclusions in SteelsOxide Inclusions
TiS and Ti-rich inclusions in austenitic stainless steel. Titanium oxide inclusions act as nucleus sites for ferrite and create an acicular ferrite structure in steel. Titanium oxide with Al and MnS in steel with 0.090 C-0.89 Mn. Traces of slag on the fracture surface in AISI D2 steel.
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Formation Mechanism of MgO･Al2O3 Spinel Inclusions in
Experiments were carried out to determine the effect of silica in the slag of CaO-SiO2-Al2O3-MgO-F system on the formation of MgO (.) Al2O3 spinel inclusion in 304 stainless steel deoxidized with Al.
Get PriceAssessment of Oxygen Control and Its Effect on Inclusion
Cheng-Bin Shi Xi-Chun Chen Han-Jie Guo Zi-Jiang Zhu Xiao-Lin Sun Control of MgO·Al2O3 Spinel Inclusions during Protective Gas Electroslag Remelting of Die Steel Metallurgical and Materials Transactions B 10.1007/sx 44 2 () (2012).
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Formation mechanism and control of MgO·Al 2 O 3 inclusions
Nov 12 2014 · Thus the formation of MgO·Al 2 O 3 inclusions would be inhibited by reducing the quantity of slag entrapment controlling the roughing slag during casting and controlling the composition of the slag and the MgO content in the ladle refractory. This is a
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