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  • Utilization Technique of Inclusion to Improve Steel ...

    2018-12-12 · composition and its size on IGF formation can be quantitatively investigated. It is reported that the complex TiN+Mn-Ti-Al-Si-O+MnS inclusion is a typical inclusion in a low-alloy carbon steel with TiN addition [3]. Also, TiO x +MnS with small amount of glassy oxide is the typical inclusion formed in the low-alloy carbon steels with Ti2O 3 and ...

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  • Manganese Sulphide Inclusions in Steel: Part One :: .

    The sulphide inc!usions formed during solidification of steel are predominantly manganese sulphide. MnS as a common inclusion adversely influences the mechanical properties, physical properties and corrosion resistance of the steels. MnS inclusions have high melting temperature (1610°C) and these are a form of primary idiomorphic crystals.

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  • ALUMINA INCLUSION BEHAVIOR DURING STEEL .

    2003-7-22 · Steel cleanliness depends on the amount, morphology and size distribution of non-metallic inclusions in steel. There is a growing need to understand and predict the fundamental mechanisms of the formation and removal of inclusion particles from steel during deoxidation and refining operations in ladles and other metallurgical vessels.

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  • Inclusion engineering in Mn-Si de-oxidized steel for thin ...

    2020-10-13 · inclusion formed in steel. For Mn-Si de-oxidized steels ferro-silicon and ferro-manganese are the two ferro-alloys used for de-oxidation. Inclusion formation and evolution during the early stages of dissolution of these ferro-alloys was experimentally studied. The mechanism for inclusion formation in their transient phase was proposed.

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  • Non Metal Inclusions in Steels – IspatGuru

    2015-1-8 · Formation of non-metallic inclusions. There are three stages in the process of inclusions formation. These stages are described below. Nucleation – At this stage nuclei of new phase are formed as a result of super saturation of the solution (liquid or solid steel) with the solutes (e.g. Al and O) due to dissolution of the additives ...

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  • TiN inclusion formation during the solidificatin of ...

    The formation of titanium nitride (TiN) nonmetallic inclusions during the solidification of stainless steel 409 was investigated for different concentrations of titanium and nitrogen at different cooling rates. Specimens were melted using an electromagnetic levitation facility. Rapid solidification was subsequently obtained in an increased gas flow (gas-cooling: 40 Ks-) or by casting into a ...

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  • Deoxidation and inclusion control - SlideShare

    2015-9-17 · Deoxidation and inclusion control 1. DEOXIDATION OF STEEL AND INCLUSION CONTROL BATCH - 7 2. DEOXIDATION OF STEEL • Oxygen is bound to dissolve in iron melt as steel making is carried out under oxidising conditions. • The oxygen content in iron varies inversely with the impurity contents, particularly with carbon.

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  • The effective modification of spinel inclusions by Ca ...

    2018-8-27 · slags (> 6% FeO) are targeted to suppress the formation of spinels. Other operations add Al as late as possible to the heat to minimize spinel formation.3 However, more recent work indicates that, under very reducing conditions (steel and slag), some spinel modification by calcium treatment is possible, and it is even suggested

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  • Inclusion formation in low-alloy steel welds - CORE

    Complexities of these models increase with a need to describe details of the inclusion formation. The applicability of the models was illustrated with two examples. In one of the examples, thermodynamic calculations of phase stability between liquid steel, AlN and Al{sub 2}O{sub 3} explained the inclusion formation in self-shielded flux cored ...

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  • DEOXIDATION AND INCLUSION CONTROL FOR ALLOY .

    2011-7-28 · the steel. These objectives are achieved by selection of suitable charge material, slag control and initial deoxidation practice in the furnace, and final deoxidation practice in the ladle. Although much has been learn-ed of the physical chemistry of the process, the art of steel-making is still in large part empirical, and successful practices ...

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  • TiN inclusion formation during the solidificatin of ...

    Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.

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  • Effect of Adding Cerium on Microstructure and .

    2017-5-9 · Babu, S. S. & David, S. A. Inclusion Formation and Microstructure Evolution in Low Alloy Steel Welds. ISIJ international 42, 1344–1353 (2002). CAS Article Google Scholar

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  • Influence of Al deoxidation on the formation of .

    The formation of acicular ferrite (AF) in steel containing Lanthanum (La) with different contents of Aluminum (Al) has been investigated. It has been found that the amount of AF in La treated steel killed by Al is less than the one with little content of Al. The reasons are as follows: first, Al can change the type of La-containing inclusions and may reduce the effectiveness of La inclusion to ...

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  • Simulation of Reoxidation Inclusion Formation in Steel .

    2010-12-21 · Simulation of Reoxidation Inclusion Formation in Steel Casting . Antonio J. Melendez, Kent D. Carlson and Christoph Beckermann. Department of Mechanical and Industrial Engineering . The University of Iowa, Iowa City, IA 52242 . Abstract . A combined theoretical and experimental study is performed to investigate the formation of

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  • Calculation of inclusion formation in low-alloy-steel ...

    1996-9-15 · While some prior work related to oxide inclusion formation in steel weld metals does exist, it has always been assumed that the oxides or inclusions will form in a fixed sequence A1203, Ti203, SiO2, and MnO, regard- less of the weld metal composition [5-7].

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  • ALUMINA INCLUSION BEHAVIOR DURING STEEL .

    2003-7-22 · Steel cleanliness depends on the amount, morphology and size distribution of non-metallic inclusions in steel. There is a growing need to understand and predict the fundamental mechanisms of the formation and removal of inclusion particles from steel during deoxidation and refining operations in ladles and other metallurgical vessels.

  • Get Price
  • Non-metallic inclusions in steel [SubsTech]

    2012-5-31 · There are three stages of inclusions formation: 1. Nucleation At this stage nuclei of new phase are formed as a result of supersaturation of the solution (liquid or solid steel) with the solutes (eg. Al and O) due to dissolution of the additives (deoxidation or desulfurization reagents) or .

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  • Mechanisms of inclusion formation in Al-Ti-Si-Mn ...

    The present investigation is concerned with basic studies of the mechanisms of inclusion formation in submerged arc (SA), gas metal arc (GMA), and flux cored arc (FCA) steel weld metals. Theoretical models of deoxidation have been developed to establish a basis for quantitative predictions of important inclusion characteristics, such as volume fraction, size, and chemical composition from ...

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  • INCLUSIONS IN CONTINUOUS CASTING OF STEEL

    2005-8-16 · Alumina (Al2O3) inclusions in LCAK steel, and silica (SiO2) inclusions in Si-killed steel are generated by the reaction between the dissolved oxygen and the added aluminum and silicon deoxidants are typical deoxidation inclusions. Alumina inclusions are dendritic when formed in a high oxygen environment, as pictured in figure 442).

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  • Thermodynamics of Complex Sulfide Inclusion .

    Controlling the morphology of the sulfide inclusion is of vital importance in enhancing the properties of structural steel. Long strip-shaped sulfides in hot-rolled steel can spherize when, instead of the inclusion of pure single-phase MnS, the guest is a complex sulfide, such as an oxide-sulfide duplex and a solid-solution sulfide particle. In this study, the inclusions in a commercial rolled ...

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  • EBSD analysis of magnesium addition on inclusion .

    2013-8-1 · MgO inclusion has recently been considered as a potential nonmetallic inclusion in acicular ferrite formation in low-carbon Mg-kilned steels,, . In the present study, the effect of Mg addition on the morphology and size of inclusions in SS400 structural steel was investigated.

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  • Model for inclusion formation in low alloy steel welds

    2007-3-27 · Oxide inclusion formation in low alloy steel welds is 1800±1700 K), sulphides may form in addition to oxides. described with a model as a function of weld metal In later stages of weld cooling, in the solid state composition and process parameters. The model was (~ 1700±1000 K), nitrides may form heterogeneously on

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  • Investigation of Inclusion Formation in Light‐Weight .

    2019-12-15 · steel research international. Volume 91, Issue 3. Full Paper. Investigation of Inclusion Formation in Light‐Weight Fe–Mn–Al Steels using Automated Scanning Electron Microscope Equipped with Energy‐Dispersive X‐Ray Spectroscopy. Michelia Alba. Corresponding Author.

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  • The effective modification of spinel inclusions by Ca ...

    2018-8-27 · the inclusion modifications demonstrated are consistent from heat to heat. This paper will postulate the mecha-nisms of spinel formation in LCAK steel produced via the EAF route and demonstrate the effective modifica-tion of the solid spinel inclusions into liquid inclusions by Ca treatment. The theoretical and practical aspects

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  • Slag inclusion formation during solidification of Steel ...

    2007-5-14 · Slag inclusion formation during Solidification of Steel alloys and in cast iron Sofia Adolfi 2007 Department of Materials Science, Royal Institute of Technology S-100 44 Stockholm, Sweden Abstract This thesis explores the formation of segregation and inclusions during solidification of steel and cast iron.

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  • Manganese Sulphide Inclusions in Steel: Part One :: .

    The sulphide inc!usions formed during solidification of steel are predominantly manganese sulphide. MnS as a common inclusion adversely influences the mechanical properties, physical properties and corrosion resistance of the steels. MnS inclusions have high melting temperature (1610°C) and these are a form of primary idiomorphic crystals.

  • Get Price
  • Modeling of Reoxidation Inclusion Formation During .

    2005-9-28 · Modeling of Reoxidation Inclusion Formation During Filling of Steel Castings Kent D. Carlson and Christoph Beckermann Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242, USA Keywords: Reoxidation inclusion, steel casting, simulation, inclusion .

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  • Utilization Technique of Inclusion to Improve Steel ...

    2018-12-12 · composition and its size on IGF formation can be quantitatively investigated. It is reported that the complex TiN+Mn-Ti-Al-Si-O+MnS inclusion is a typical inclusion in a low-alloy carbon steel with TiN addition [3]. Also, TiO x +MnS with small amount of glassy oxide is the typical inclusion formed in the low-alloy carbon steels with Ti2O 3 and ...

  • Get Price
  • MODELING OF REOXIDATION INCLUSION FORMATION .

    MODELING OF REOXIDATION INCLUSION FORMATION IN STEEL SAND CASTING A.J. Melendez1, K.D. Carlson1, C. Beckermann1, M.C. Schneider2 1 Dep. Mechanical and Industrial Engineering, University of Iowa, Iowa City, Iowa 52242, USA 2 MAGMA Giessereitechnologie , Kackertstrasse 11, D-52072 Aachen, Germany Abstract

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  • MODELING OF REOXIDATION INCLUSION FORMATION .

    In continuous casting of steel, it has been found that only about 107 m-3 inclusions are larger than 80 microns, and the number larger than 200 microns is on the order of 104 m-3 [5]. In steel sand casting, the tiny (less than 80 microns) inclusions are not a concern in terms of surface quality.

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