Pulsating electromagnetic casting technique for slab casting

Tani, Masahiro; Tanaka, Ken; Fukunaga, Shinichi; Toh, Takehiko; Tunenari, K.; Umetsu, K.; Hayashi, Kosuke; Zeze, Masafumi

doi:10.1179/136404609x368019

Cited by 4 publications

(10 citation statements)

References 3 publications

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“…One of the authors proposed an "R shadow method 8) " as a high efficient computation method of magneto hydrodynamic phenomena such as ones observed in the pulse electromagnetic casting (pulse EMC) processes 3,9) which give a convex shape of free surface of the molten metals, and has confirmed validity of the method. This method, however, cannot deal with a complex shape of free surface because the free surface shape is assumed to be monotone.…”

Section: (Received On September 26 2017; Accepted On November 24 2017)mentioning

confidence: 91%

Magneto Hydrodynamic Calculation of Electromagnetic Stirring with Concave Shaped Free Surface Using Based Plane Shadow Method

Urita

Fujisaki

2018

ISIJ Int.

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Section: (Received On September 26 2017; Accepted On November 24 2017)mentioning

confidence: 91%

Magneto Hydrodynamic Calculation of Electromagnetic Stirring with Concave Shaped Free Surface Using Based Plane Shadow Method

Urita

Fujisaki

2018

ISIJ Int.

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“…Three types of horizontally-moving magnetic fields near the nozzle ports are EMLA [16,32,33,40,51,56,121], EMLS [16,32,33,40,51,56,122], and EMRS [16,32,33,40,51] or M-EMS [123,124]. Alternatively, EMC applies vertically-moving magnetic fields near the meniscus [36][37][38]. Other types of moving field systems-SEMS and S-EMS-are applied to the strand below the mold [33,[40][41][42][43][44][45][46][47].…”

Section: Moving Fields: Emls Emla Emrs M-ems Emc and Semsmentioning

confidence: 99%

“…Fourthly, the vertically moving magnetic fields generated by EMC induce vertical rotating flows, consisting of very small upper and lower counter-rotating recirculation regions near the meniscus in the mold, where the magnets are located [36,38]. This lessens the tendency of molten steel to overflow the meniscus during oscillation mark and hook formation.…”

Section: Moving Fields: Emls Emla Emrs M-ems Emc and Semsmentioning

confidence: 99%

“…This lessens the tendency of molten steel to overflow the meniscus during oscillation mark and hook formation. Thus, EMC can decrease surface defects including uneven slab surface and particle capture during initial solidification [36]. More details are given in Section 5.3.…”

Section: Moving Fields: Emls Emla Emrs M-ems Emc and Semsmentioning

confidence: 99%

“…Four sets of magnets are installed two on each wide face, as shown in Figure 1d, and can generate three different moving fields: Electromagnetic Level Stabilizer (EMLS) which moves the fields toward the nozzle for slowing the jet; Electromagnetic Level Accelerator (EMLA), which moves the fields toward the narrow faces for accelerating the jet; and Electromagnetic Rotating Stirrer (EMRS) [32,33], also called Electromagnetic Stirring (EMS) in the Mold (M-EMS) [34,35], which move the fields in opposite directions across each wide face, for horizontally-rotating the flow around the perimeter of the mold. Alternatively, another moving field system, called Electromagnetic Casting (EMC), creates vertical rotating fields near the meniscus in the mold, to reduce oscillation mark depth and hook formation [36][37][38]. These fields can be set according to standard operating conditions, or adjusted continuously according to current conditions.…”

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confidence: 99%

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Electromagnetic Forces in Continuous Casting of Steel Slabs

Cho

Thomas

2019

Metals

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This paper reviews the current state of the art in the application of electromagnetic forces to control fluid flow to improve quality in continuous casting of steel slabs. Many product defects are controlled by flow-related phenomena in the mold region, such as slag entrapment due to excessive surface velocity and level fluctuations, meniscus hook defects due to insufficient transport of flow and superheat to the meniscus region, and particle entrapment into the solidification front, which depends on transverse flow across the dendritic interface. Fluid flow also affects heat transfer, solidification, and solute transport, which greatly affect grain structure and internal quality of final steel products. Various electromagnetic systems can affect flow, including static magnetic fields and traveling fields which actively accelerate, slow down, or stir the flow in the mold or strand regions. Optimal electromagnetic effects to control flow depends greatly on the caster geometry and other operating conditions. Previous works on how to operate electromagnetic systems to reduce defects are discussed based on results from plant experiments, validated computational models, and lab scale model experiments.

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Investigation structure and properties of wire from the alloy of AL-REM system obtained with the application of casting in the electromagnetic mold, combined rolling-extruding, and drawing

Sidelnikov

Voroshilov

Motkov

et al. 2021

Int J Adv Manuf Technol

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The paper presents the results of studies of the structure and properties of a wire with a diameter of 0.5 mm from an alloy of the Al-REM system with a rare-earth metal content of 7-9%. Wire obtained as a result of the implementation of the technology of its manufacture using the methods of casting into an electromagnetic mold (EMM), continuous extruding and drawing.The rheological properties of the metal of continuously cast round billets from the experimental alloy obtained using an electromagnetic mold are determined. The modeling and analytical assessment of the possibility of carrying out the process of combined rolling-extruding (CRE) of such billets in a closed boxtype roll groove of a continuous extruding unit are carried out. The features of metal shaping have been studied. The temperature-speed and technological parameters was found at which the CRE process can be carried out in a stable mode of operation. Data have been obtained for the forces acting on the die and rolls and the moments on the rolls during rolling-extruding.The results of experimental studies of the process of obtaining longish deformed semi-finished products from an experimental alloy on the laboratory unit CRE-200 and the pilot plant unit CRE-400 are presented. The structure of the metal has been studied; data on the ultimate tensile strength, yield strength, relative elongation, and electrical resistivity of hot-extruded rods and wires in cold-worked and annealed states have been obtained.It was found that the proposed processing modes make it possible to obtain by the method of combined rolling-extruding rods with a diameter of 9 mm in industrial conditions from longish billets with a diameter of 18 mm, cast by means of EMM. Wire in a cold-worked and annealed state with a diameter of 0.5 obtained by drawing from the rods with a diameter of 9 mm from an experimental alloy of the Al-REM system containing 7-9 rare earth metals with the required physical and mechanical properties.

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Pulsating electromagnetic casting technique for slab casting

Cited by 4 publications

References 3 publications

Magneto Hydrodynamic Calculation of Electromagnetic Stirring with Concave Shaped Free Surface Using Based Plane Shadow Method

Magneto Hydrodynamic Calculation of Electromagnetic Stirring with Concave Shaped Free Surface Using Based Plane Shadow Method

Electromagnetic Forces in Continuous Casting of Steel Slabs

Investigation structure and properties of wire from the alloy of AL-REM system obtained with the application of casting in the electromagnetic mold, combined rolling-extruding, and drawing

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