Simulation of Bending of Heavy-Duty Components of Stands in a Five-Stand Longitudinal-Wedge Mill

Mashekov, S. A.; Nurtazaev, A. E.; Nugman, E. Z.; Absadykov, B. N.; Mashekova, A. S.

doi:10.1007/s11015-018-0631-0

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Although the details of the industrial cooling systems are not available in the open literature, the name of the cooling systems and some of their features are documented. For example, Mashekov et al provided a list of various industrial cooling systems. Each system is characterized by its nozzle configuration, nozzle shape, flow rate, operating pressure, dimensions, type of cooling (laminar cooling, water curtain, spray plus laminar, laminar jet) etc …”

Section: Runout Table Cooling Zonesmentioning

confidence: 99%

Simulation of Runout Table Cooling

Guemo

Prodanovic

Militzer

2018

steel research int.

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Accelerated cooling on the runout table of hot mills has become a key technology to produce thermo‐mechanically controlled processed (TMCP) steel plates and strips. During runout table cooling austenite decomposition takes place and determines the final microstructure and, hence, the properties of the hot‐rolled steel. There is an increased tendency to produce higher strength TMCP steels with complex microstructures including bainite and martensite. To tailor these microstructures, it is required to carefully design runout table cooling paths and lower the cooling stop and coiling temperature, respectively, for producing flat products with homogeneous mechanical properties. Thus, simulation of runout table cooling is a crucial aspect of process modeling. In the present paper, the status of runout table simulation approaches is reviewed. In particular, the three boiling mechanisms of water cooling, that is, nucleate, transition, and film boiling are discussed. The development of appropriate heat transfer coefficients is rather mature for nucleate and film boiling, respectively. Modeling and controlling the transition boiling regime below the Leidenfrost temperature remains a challenge as heat extraction rates increase with decreasing steel temperature. The status of heat transfer simulations for transition boiling is thus discussed in detail. Currently, the proposed heat transfer correlations, while increasingly based on the underlying physics, still contain a number of empirical parameters that require tuning with experimental and/or mill data. The review is limited to information in the open literature while recognizing that a number of proprietary in‐house runout table cooling models exist that are developed either by equipment makers or steel companies to control accelerated cooling to lower cooling stop or coiling temperatures.

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Section: Runout Table Cooling Zonesmentioning

confidence: 99%

Simulation of Runout Table Cooling

Guemo

Prodanovic

Militzer

2018

steel research int.

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“…In order to carry out the calculation it is necessary to use both classical methods of analysis of the stress state in the construction on the basis of the provisions of the theory of elasticity and the phenomenological theory of fracture, as well as to apply advanced numerical simulation to evaluate stress and strain distributions (FEM) using appropriate software. Such approaches are currently used by leading domestic and foreign enterprises for the design of metallurgical equipment [8,9].…”

Section: Applying the Evaluation Methodology For The 2000 Titanium Sh...mentioning

confidence: 99%

Developing the Methodology of Failure Probability for the Rolling Equipment Units and Elements

Belyaev

Fedulov

Surkov³

et al. 2023

KEM

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The safety of basic parts of the rolling equipment is most at risk due to the complex geometrical shape and significant levels of nominal stresses. With a significant mass of such parts and a long production time, the replacement process is accompanied by the need to dismantle the old mill and install a new one. Currently, there are no specialized methods for assessing the risks of failures in relation to the rolling equipment, therefore, it is required to develop new methodological provisions and adapt the existing general methods of risk assessment to real production conditions. Based on the fundamentals of the regulatory document, a methodology for assessing the risks of failures in relation to the rolling equipment has been developed. The roughing stand of the “2000” hot rolling mill for titanium alloy sheet production was chosen as a practical object for assessing the risks of failure. The preliminary analysis of the dangers and their consequences had shown that for most of the elements of the working stand, which perceive the rolling force, as well as for the units and parts of the main drive loaded with the rolling torque, there are dangers that can lead to disruption of the deadlines for fulfilling orders for rolled products. For a numerical assessment of these risks, special calculations were performed.

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“…-based on the numerical calculations to determine their influence on the pattern of formation of non-ferrous metal structures. с -side view a matrix [20,21]. For this, a three-dimensional geometric model of the workpiece, rolls and matrix was built in the Inventor CAD software (Fig.…”

Section: The Aim and Objectives Of The Studymentioning

confidence: 99%

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

Mashekov

Nurtazayev

Mashekova

et al. 2020

EEJET

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This paper proposes a radial-shear mill (RSM) of a new design, which allows by rolling or rolling and pressing operations obtaining high-quality rods and wires. In addition, it proposes the method of computer calculation of the energy-power parameters of bar extrusion at the RSM of the new design. Mathematical dependences and calculation algorithm were described, which allow calculating energy-power parameters of the combined bar manufacturing process at a given level of technological parameters. Based on the results of analytical studies and computer modeling, the energy-power parameters were defined and analyzed, in addition, the laws of their changes were determined. It is shown that, regardless of the alloy grade or type, when rolling billets on a new RSM with smooth rolls, the strain force is larger in magnitude compared to rolling in helical rolls. It was found that, in comparison with rolling of bars in smooth and helical rolls, their processing by a combined rollingpressing process leads to an increase in the deformation force of alloys M1 and D16 by 1.1-1.15 and 1.15-1.3 times, respectively. It is shown that during the deformation of the rods on the new RSM, by controlling the paths of the metal flow in the deformation zone, intensive grinding of the metal structure can be achieved. It was found that when pressing the bars on the new RSM, the temperature of the workpiece increases up to 420 °С, which leads to a sharp decrease in the force required for deformation. The nature of the temperature distribution of the pressed metal in the deformation zone was determined. The adequacy of the models was proved by comparing calculated values of the power parameters of extrusion, obtained by engineering technique and numerical simulation

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Simulation of Bending of Heavy-Duty Components of Stands in a Five-Stand Longitudinal-Wedge Mill

Cited by 4 publications

References 2 publications

Simulation of Runout Table Cooling

Simulation of Runout Table Cooling

Developing the Methodology of Failure Probability for the Rolling Equipment Units and Elements

Identification of regularities of changes in energy-power parameters depending on the design of the roller node of a new radial-shear mill by computer simulation

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