Effect of Current on Structure and Macrosegregation in Dual Alloy Ingot Processed by Electroslag Remelting

Liu, Yu; Zhang, Zhao; Li, Guangqiang; Wang, Qiang; Wang, Li; Li, Baokuan

doi:10.3390/met7060185

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…The interaction of the electromagnetic field provides the heat required for electrode melting in the electroslag remelting process and has an important influence on the temperature change and the solidification structure of the final ingot. Therefore, it is very important to study the changes in the electromagnetic field and temperature field in the process of electroslag remelting, optimize the process of electroslag remelting and obtain high-quality ingot [12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Electromagnetic Field in Slab Electroslag Remelting Process with Double Electrode Series

Li,

Jing,

Sun

2023

Metals

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In this paper, a mathematical model of an electromagnetic field during an electroslag remelting process of industrial-scale slab was established using a Maxwell 3D module in Ansys Electromagnetics Suite. The distribution characteristics of the magnetic field intensity, current density and Joule heat density during the electroslag remelting process were analyzed in detail. On this basis, the influence of the current frequency on the electroslag remelting process of an industrial scale is studied, and the influence of process parameters such as the slag pool depth, electrode insertion depth and ingot height on the electromagnetic field is also considered. The results show that the Joule heat generated in the slag pool is much greater than that of the electrode and the ingot. The maximum Joule heat is located at the contact between the electrode corner and the slag pool, and the Joule heat near the middle of the two electrodes is greater than the rest. With the increase in the current frequency, the current density distribution in the slag cell is basically unchanged. The current density inside the two electrodes increases obviously with the current frequency. When the current frequency increases from 10 Hz to 50 Hz, the maximum current density at the inner surface of the electrode increases by 14.7%. The current distribution at the lower side of the electrode in the slag pool is relatively uniform, and the current density in this region decreases with the increase in the height of the slag pool and the increase in the depth of the electrode inserted into the slag pool.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Electromagnetic Field in Slab Electroslag Remelting Process with Double Electrode Series

Li,

Jing,

Sun

2023

Metals

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“…However, coarse grains, especially coarse columnar grains, are more prominent in ESR ingots. [7][8] Therefore, the coarse columnar grain refinement during ring-rolling processes of lager hollow ingots has become a challenge for manufacturing highquality retaining rings, and the investigation of coarse columnar grain refinement during the ring-rolling processes of the steel plays an important role with regards to optimizing the ring-rolling process parameters.…”

Section: Introductionmentioning

confidence: 99%

The influence of hot-rolling reductions and passes on the microstructure and mechanical properties of Mn18Cr18N ESR steel

Li¹,

Zhao²,

Qin³

et al. 2018

Mater. Tehnol.

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The single-pass hot-rolling process with height reductions of 15 %, 30 %, 40 % and 50 %, and the three-pass and the five-pass hot-rolling processes with 60 % total reduction, were carried out for Mn18Cr18N ESR steel slabs. The influence of the hot-rolling reductions and passes on the microstructure and mechanical properties of the rolled samples was investigated. For the single-pass rolled process, the volume fraction of the refined dynamically recrystallized grains increased with the increasing of the reduction, both the tensile strength and elongation also increased with the increasing of the reduction, and the fracture morphology transformed to ductile at higher reductions. For the three-pass and the five-pass rolling processes, strain-hardening structures containing a large number of slip/shear bands and fewer refined dynamically recrystallized grains were present. The tensile strength increased with the increasing number of passes, but the elongation decreased with the increasing number of passes. The fracture morphologies were also characterised by brittle fractures. After the solid-solution treatment, uniform refined static recrystallized grains were obtained in the three-pass rolled part, while grain growth following static recrystallization occurred in the five-pass rolled part.

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“…Even the individual areas are extensively represented. In manufacturing, there are articles on the effects of welding [1-4], electroslag remelting [5,6], and rolling [7][8][9]. As is typical in any discussion of steels, many papers focus on microstructure-property relations [10][11][12][13][14].…”

mentioning

confidence: 99%

Alloy Steels

Tuttle

2018

Metals

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Since their invention in 1865, alloy steels have found broad application in multiple industries; the automotive, aerospace, heavy equipment, and pipeline industries to name a few. Alloy steels include a tremendous variation in alloying content. They range from the 1-2 wt. % Cr or Ni in some low alloy steels to the 15-18 wt. % Cr content of many stainless steels. The topic of alloy steels contains both the common 4140 and 316 alloys to more exotic alloys such as the Hadfield steels. These steels can form a wide variety of microstructures such as pearlite, bainite, or martensite, which result in an equally broad range of properties. It is this range that has made them useful to so many industries. In some cases, these are the only steel alloys that can provide the required combination of properties. Their use in the automotive industry has been key to the development of safer vehicles and improved fuel efficiency. Our modern world would not be possible without the advanced alloy steels employed to safely transport oil through pipelines. Therefore, continued development is necessary to expand markets, improve products, and enhance the human condition. It is this importance that has lead us at Metals to create the special issue on alloy steels that you are reading. What follows are 23 papers from a wide range of authors and nationalities which represents the current state of the art in alloy steel research.This issue, like alloy steels themselves, covers diverse set of articles. There are articles on manufacturing, microstructure, heat treatment, corrosion, and service conditions. This expansive range reflects the multifaceted nature of alloy steels. Even the individual areas are extensively represented. In manufacturing, there are articles on the effects of welding [1-4], electroslag remelting [5,6], and rolling [7][8][9]. As is typical in any discussion of steels, many papers focus on microstructure-property relations [10][11][12][13][14]. These form the basis for improving the alloys and their processing. Another large section of work focuses on topics of more interest to those who are the final customers of the steel industry. Many alloy steels are heat treated and understanding the effects of heat treatment and heat treating parameter selection ensure the correct microstructure and properties are attained. Readers will find these topics addressed by several authors in our pages [10,[15][16][17][18]. Those readers interested in improving the corrosion resistance of alloy steels will find several pieces on this topic [2,19,20]. An aspect often ignored by many journals is performance under actual service conditions in the final product, there are two articles on wear resistance and pipeline life that remind us of the importance of understanding the final product [21][22][23]. Data from the final products created from these steels always provide a powerful insight which the best labs can never replicate, and their inclusion in this special issue is a significant contribution to this special issue.Of particular inte...

show abstract

Effect of Current on Structure and Macrosegregation in Dual Alloy Ingot Processed by Electroslag Remelting

Cited by 13 publications

References 25 publications

Numerical Simulation of Electromagnetic Field in Slab Electroslag Remelting Process with Double Electrode Series

Numerical Simulation of Electromagnetic Field in Slab Electroslag Remelting Process with Double Electrode Series

The influence of hot-rolling reductions and passes on the microstructure and mechanical properties of Mn18Cr18N ESR steel

Alloy Steels

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