Friction and the Hot Rolling of Steel

Panjković, Vladimir

doi:10.1201/b16516

Cited by 18 publications

(20 citation statements)

References 28 publications

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“…A considerable number of works [1][2][3][4][5][6][7][8][9][10] were devoted to the issue of calculating the normal contact stresses in the deformation center during the rolling of the strips.…”

Section: Literature Reviewmentioning

confidence: 99%

Numerical Experiment for the Calculation of Normal Contact Stress in the Deformation Center when Rolling a Metal Strip

Yavtushenko

Проценко

Bondarenko

et al. 2019

JES

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The possibility of application of the program complex called Mathcad Prime 5 for calculation of normal contact stresses in the center of deformation during cold rolling of the strips is considered. The algorithm, the block-scheme and the computer program of calculation of the normal contact stresses during rolling of the strips on the reverse mill 1680 PJSC “Zaporizhstal” are developed. The epures were constructed and a comparative analysis of the formulas used to calculate the normal contact stresses in the deformation center was carried out. Received calculation data in Mathcad Prime 5 coincides with the literary data, which has practical value for both educational process and research and design work. Based on the analysis of the contact stress epures, it can be concluded that the most accurate calculation of the total metal pressure on the rolls during cold rolling is possible only when the formulas used to consider the change in the forced yield strength in the deformation center by the law of a straight line or the parabolic law. Keywords: CAD, CAE, block-crankcase, 3D model, casting defect.

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Section: Literature Reviewmentioning

confidence: 99%

Numerical Experiment for the Calculation of Normal Contact Stress in the Deformation Center when Rolling a Metal Strip

Yavtushenko

Проценко

Bondarenko

et al. 2019

JES

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“…In all of the above studies, the authors focused preferentially on the behavior of the sheet oxide scale but some research teams looked at the tribological behavior of oxides on cylinders at high temperatures. The works of Pellizzari et al [22−24], Vergne et al [25] and Joos et al [26] have been referred for many years, and the review of roll wear and oxide scale formation was presented by Zamri, in his Phd bibliography [27], and by Panjkovic [28].…”

Section: Oxide In Rolling Processmentioning

confidence: 99%

Tribology in metal forming at elevated temperatures

et al. 2015

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Abstract:The tribo-characteristics of metal forming at high temperatures have not yet been well understood due to the complex nature of thermal, microstructural, interaction, and process parameters. This is a review paper on the effects of temperature, coating, and lubrication to the tribological characteristics in hot forming as well as the tribometers for different metal forming processes at elevated temperatures mainly based on the experimental work. The tribological behaviors of oxides in hot forming, such as rolling and stamping, were reviewed and presented. Some commonly used surface coatings and lubricants in hot forming were given. Many types of tribometer were selected and presented and some of them provided a great potential to characterize friction and wear at elevated temperatures. Nevertheless, more testing conditions should be further investigated by developing new tribometers. Eventually, experimental results obtained from reliable tribometers could be used in theory and model developments for different forming processes and materials at high temperatures. The review also showed the great potential in further investigations and innovation in tribology.

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“…When metal parts are heated due to friction or exposure to environment, it leads to alteration of some tribological parameters, including, primarily, friction coefficient. The alteration of these parameters may lead to stimulation of destructive processes on the surface of the metal part and in its body which influences its wear resistance and life span [1].…”

Section: Introductionmentioning

confidence: 99%

“…Operational heating and subsequent acceleration of wear process, e.g. friction or roller bearing, speed reducers, worm gears and other parts are typical situations arising during operation of various assemblies and devices [1][2]. That is why stabilization of friction coefficient related to heating of friction surfaces of metal parts is an important and relevant scientific and technical problem.…”

Section: Introductionmentioning

confidence: 99%

“…However, many of these methods are inefficient both from the point of view of technical parameters and economically, because they are accompanied by continued high-temperature heating, limitation of mass-size dimensions and fragility of the layers obtained. High temperatures can lead to a change in the structure of the metal, a decrease in strength properties, distortions and low yield of usable product [1][2][4][5][6]. Therefore, for industrial purposes it is important to develop other methods for modifying metal surface with minimal or low thermal impact, in particular, ion implantation methods, electrospark doping, microarch doping and mineral coating technology [1][2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research of Tribological Features of Steel Surface by Creating Mineral Coatings

Skazochkin¹,

Бондаренко²,

Kislov³

2018

JESTR

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The work investigates some tribological parameters of the surfaces of friction pairs made of steel, with mineral layers. A comparative study of the friction coefficient of 18CrNiMo7-6 steel specimens with and without a mineral coating is performed. The lowest friction coefficient value was achieved for samples with mineral coating, without HFC hard surfacing before creating a mineral layer, and it was approximately 15% lower in comparison with the samples with HFC hard surfacing, but without mineral coating. The friction coefficient in the temperature range of 30…140 0 С, with constant displacement speed of samples with mineral coatings is practically unchanged for every sample type, the variation range does not exceed 0.02, as contrasted with the friction coefficient of the samples with hard surfacing, but without mineral coating. The value of the coefficient of volumetric wear of an aluminum oxide toroid during rotation with disks with some types of mineral coatings was at the level of detection limit (less than 1.2x10-9 mm 3 /Nm), which is significantly less than the coefficient of volume wear of a toroid during rotation with disks without coating (4-7)х10-8 mm 3 /Nm.

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Friction and the Hot Rolling of Steel

Cited by 18 publications

References 28 publications

Numerical Experiment for the Calculation of Normal Contact Stress in the Deformation Center when Rolling a Metal Strip

Numerical Experiment for the Calculation of Normal Contact Stress in the Deformation Center when Rolling a Metal Strip

Tribology in metal forming at elevated temperatures

Research of Tribological Features of Steel Surface by Creating Mineral Coatings

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