Closure to “Discussion of ‘Effect of Idle Roll Bearing Friction on the Hot-Rolling Performance of Single-Roll Drive Mills’” (1967, ASME J. Eng. Ind., 89, p. 487)

1967 ◽  
Vol 89 (3) ◽  
pp. 487-488
Author(s):  
R. L. Holbrook ◽  
C. F. Zorowski
Keyword(s):  
Hot Rolling ◽  
Roll Bearing ◽  
Roll Drive ◽  
Bearing Friction

Effect of Idle Roll Bearing Friction on the Hot-Rolling Performance of Single-Roll Drive Mills

1967 ◽  
Vol 89 (3) ◽  
pp. 482-487 ◽  
Author(s):  
R. L. Holbrook ◽  
C. F. Zorowski
Keyword(s):  
Hot Rolling ◽  
Deformation Process ◽  
Iterative Procedure ◽  
Analytical Models ◽  
Drag Torque ◽  
Point Location ◽  
Rolling Parameter ◽  
Roll Bearing ◽  
Roll Drive ◽  
Bearing Friction

A study is made of the effects of idle roll drag torque on the hot-rolling performance of single-roll drive mills using two analytical models which consider the nonsymmetry of the deformation process. Predictions of roll load, torque, and exit stock curvature for a specified idle roll drag torque on a given mill setup are obtained by applying an iterative procedure of solution to a series of intermediate rolling parameter results presented in terms of the idle roll neutral point location and strip reduction. In general, it is found that the drag torque increases the stock curvature significantly, is essentially additive to the required drive torque, and decreases the roll load only slightly.

Analysis of interconnections between technical systems on hierarchically connected technological levels of steel sheet production by hot rolling

2020 ◽  
Vol 76 (8) ◽  
pp. 847-855
Author(s):  
E. N. Shiryaeva ◽  
M. A. Polyakov ◽  
D. V. Terent'ev
Keyword(s):  
Hot Rolling ◽  
Systems Analysis ◽  
Rolling Mill ◽  
Steel Sheet ◽  
Technological System ◽  
Necessary Condition ◽  
Rolled Sheet ◽  
Technological Systems ◽  
Hot Rolling Mill ◽  
Technical Systems

Complexity of modern metallurgical plants, presence of great number of horizontal and vertical interactions between their various structural subdivisions makes it necessary to apply a systems analysis to elaborate effective measures for stable development of a plant operation. Among such measures, digitalization of a plant is widespread at present. To implement the digitalization it is necessary to have clear vision about links at all the levels of the technological system of a plant. A terminology quoted, accepted in the existing regulatory documents for defining of conceptions, comprising the technological system. It was shown, that the following four hierarchical levels of technological systems are distinguished: technological systems of operations, technological systems of processes, technological systems of production subdivisions and technological systems of plants. A hierarchical scheme of technological systems of hot-rolled sheet production at an integrated steel plant presented. Existing horizontal and vertical links between the basic plant’s shops shown. Peculiarities of flows of material, energy and information at the operation “rolling” of the technological system “hot rolling of a steel sheet” considered. As a technical system of the technological process of the hot rolling, the hot rolling mill was chosen. A structural diagram of the hot rolling mill was elaborated, the mill being consisted of reheating furnaces, roughing and finishing stand groups, with an intermediate roll-table between them, and down-coilers section. Since the rolling stands are the basic structural elements of the hot rolling mill, structural diagrams of a roughing and a finishing stands were elaborated. Results of the systems analysis of the technological and technical systems, hierarchically linked in the process of steel sheet hot rolling, can be applied for perfection of organization structure of the whole plant, as well as for elaboration mathematical models of a system separate elements functioning, which is a necessary condition for a plant digitalization.

Thermal-fatigue resistant work rolls for hot rolling mills

2019 ◽  
Vol 61 (5) ◽  
pp. 397-404
Author(s):  
Vyacheslav Goryany ◽  
Olga Myronova ◽  
Johannes Buch ◽  
Alexander Buch ◽  
Frank Stein
Keyword(s):  
Thermal Fatigue ◽  
Hot Rolling ◽  
Rolling Mills ◽  
Work Rolls

Examination of Oxide Scales Formed During Hot Rolling of Steels

2019 ◽  
Vol 56 (7) ◽  
pp. 449-456
Author(s):  
T. Höfler ◽  
H. Danninger ◽  
B. Linder
Keyword(s):  
Hot Rolling ◽  
Oxide Scales

Hot Rolling Process Simulation: Application to UIC-60 Rail Rolling

2010 ◽  
Vol 3 (1) ◽  
pp. 65-71
Author(s):  
Armindo Guerrero ◽  
Javier Belzunce ◽  
Covadonga Betegon ◽  
Julio Jorge ◽  
Francisco J. Vigil
Keyword(s):  
Hot Rolling ◽  
Process Simulation ◽  
Rolling Process ◽  
Hot Rolling Process

Effect of the Si and Al Content in Ferritic Electrical Steels on the Flow Behaviour and Dynamic Softening in Hot Rolling

2013 ◽  
Vol 762 ◽  
pp. 747-752
Author(s):  
Pablo Rodriguez-Calvillo ◽  
M. Perez-Sine ◽  
Jürgen Schneider ◽  
Harti Hermann ◽  
Jose María Cabrera ◽  
...  
Keyword(s):  
Hot Rolling ◽  
Flow Behaviour ◽  
Flow Curves ◽  
Electrical Steels ◽  
Al Content ◽  
Wide Range ◽  
Dynamic Softening ◽  
Hot Rolling Conditions ◽  
Hardening And Softening

FeSi steels with and without addition of Al are widely used as electrical steels. To improve the knowledge of the effects by the addition of Si and Al on the hardening and softening under hot rolling conditions, the behaviour of the flow curves in a wide range of temperatures and deformation velocities have been studied.

scholarly journals Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 384
Author(s):  
Tomasz Dembiczak ◽  
Marcin Knapiński
Keyword(s):  
Mathematical Models ◽  
Hot Rolling ◽  
Constitutive Equations ◽  
Rolling Process ◽  
Bainitic Steel ◽  
Compression Tests ◽  
High Carbon ◽  
Bainite Steel ◽  
Dilatometric Studies

Based on the research results, coefficients in constitutive equations, describing the kinetics of dynamic, meta-dynamic, and static recrystallization in high-carbon bainitic steel during hot deformation were determined. The developed mathematical model takes into account the dependence of the changing kinetics in the structural size of the preliminary austenite grains, the value of strain, strain rate, temperature, and time. Physical simulations were carried out on rectangular specimens. Compression tests with a flat state of deformation were carried out using a Gleeble 3800. Based on dilatometric studies, coefficients were determined in constitutive equations, describing the grain growth of the austenite of high-carbon bainite steel under isothermal annealing conditions. The aim of the research was to verify the developed mathematical models in semi-industrial conditions during the hot-rolling process of high-carbon bainite steel. Analysis of the semi-industrial studies of the hot-rolling and long-term annealing process confirmed the correctness of the predicted mathematical models describing the microstructure evolution.

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