Features of the Continuous Casting of Small-Section Billets from Copper-Based Alloys

Tavolzhanskii, S. A.; Pashkov, I. N.

doi:10.1007/s11015-021-01088-y

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…To achieve more rapid speeds and higher throughputs, it is noted that the application of dwell and pushback motions are required, as they contribute to increased solidified shell strengths [8,44] and a reduction in unwanted sticking of the cast piece to the inner die walls. [44,45] The current work highlighted the formation of internal microporosity defects for slower speeds (where slower speeds are typically associated with better casting quality [11,12] ), despite the additional inclusions of dwell and pushback motions.…”

Section: E Discussion On Casting Speeds Settingsmentioning

confidence: 99%

“…reduces friction and sticking in some casting configurations [3] maintains a more consistent solidified shell [8,44] increases heat transported out of the die (Fig. 11) reduces size of hotspots (Fig.…”

Section: Open Accessmentioning

confidence: 99%

“…[2][3][4][5][6] For CC, the typical motions comprise of a continuous withdrawal (out of the casting setup), a pause (dwell), or pushback (into the crucible/ melt) coinciding with a remelt. [3,[7][8][9] CC may include a variety or combination of these motions, which are repetitive and can be referred to as a pulse sequence. [1] External defects, such as pulse marks, appear as notches on the outer periphery of a directionally cast billet/wire and are witnessed in most CC alloy systems.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Periodic Centerline Porosity and Pulse Marks by CFD and Experimentation for Continuously Cast Copper

Jones

Russell

Abdullah

et al. 2022

Metall Mater Trans B

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For 8 mm OFCu rod, the formation of pulse mark defects on the exterior of the rod and periodic macroporosity (> 1 mm diameter pores) occurring internally along the centerline of the castings have been observed and noted to limit the maximum attainable withdrawal rates (~ 4 m/s). Conversely, the same casting defects have been witnessed for slower rates; therefore, investigations were performed to investigate how the casting motions (withdrawal, dwell, and pushback) formed these defects and could be prevented. Characterization of the physical properties of the cast rods by tensile testing and analysis by optical and computed tomography (CT) imaging revealed correlations to the outer pitch length marks on the rods and confirmed relationships to casting motions and pitch lengths evaluated from metallurgical equations. Computational fluid dynamic modeling using Ansys Fluent v.R1 was applied to quantify the localized formation and dissipation of periodic hotspots internally within the die for the different motions. A mechanism leading to periodic porosity was identified, which was irrespective of the average casting withdrawal rates and enabled prediction of the location, frequency, and magnitude of the macroporosity defect.

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Section: E Discussion On Casting Speeds Settingsmentioning

confidence: 99%

Section: Open Accessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of Periodic Centerline Porosity and Pulse Marks by CFD and Experimentation for Continuously Cast Copper

Jones

Russell

Abdullah

et al. 2022

Metall Mater Trans B

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show abstract

“…Various technological aspects of the contact copper wire and the effect of some chemical elements on its properties are considered in works [6][7][8][9][10]. For example, paper [6] presents the features of obtaining long blanks from technical copper by processing welding seams, which very often lead to breakage.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…For example, paper [6] presents the features of obtaining long blanks from technical copper by processing welding seams, which very often lead to breakage. The authors of work [7] investigated the regularities of solidification of blanks during continuous casting from top to bottom and the features of the design of the crystallizer for such a process. As for works [8][9][10], they report the results of the influence of tin and magnesium on the properties of copper.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identifying the influence of technological factors on the structure and properties of contact wire from secondary copper

Petrovsky¹,

2023

EEJET

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This paper reports the analysis of studies on the use of secondary copper for the production of articles based on it, namely the contact wire for electric transport. The effect of the drawing step on the macro- and microstructure and physical and mechanical properties of the copper wire was studied. The optimal draw pitch for continuous copper casting is 8.2 mm. At a temperature of the melt (casting) of 1200 °C and a draw step of 8.2 mm, the average crystallization rate is ~300 °C/s. This provides sufficient time for crystallization, and with such parameters, the heat transfer from the metal receiver does not have a noticeable effect on the structure. At the same time, it was established that Mg is a modifier for liquid Cu while all other elements do not have such an effect and form solid solutions with copper. It is shown that the increase in the concentration of silver from 0.082 at% to 0.092 at% led to an increase in specific electrical resistance by 0.582 %. As for other elements, namely, iron, the change in its amount from 0.002 at% to 0.005 at% increased the specific resistance of copper by 1.733 %. The change in nickel concentration from 0.024 at% to 0.036 at% and tin from 0.0010 at% to 0.0035 at% led to its growth by 2.927 % and 1.269 %, respectively

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Study of Properties and Structure of Silicon Bronze CuSi3Mn1 (C65500) Wire at Various Stages of Its Production by Continuous Casting and Subsequent Drawing

et al. 2022

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Features of the Continuous Casting of Small-Section Billets from Copper-Based Alloys

Cited by 3 publications

References 7 publications

Prediction of Periodic Centerline Porosity and Pulse Marks by CFD and Experimentation for Continuously Cast Copper

Prediction of Periodic Centerline Porosity and Pulse Marks by CFD and Experimentation for Continuously Cast Copper

Identifying the influence of technological factors on the structure and properties of contact wire from secondary copper

Study of Properties and Structure of Silicon Bronze CuSi3Mn1 (C65500) Wire at Various Stages of Its Production by Continuous Casting and Subsequent Drawing

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