Research on Aluminum Plate Reversible Hot-Rolling Mathematical Model and Schedule

2012 ◽  
Vol 157-158 ◽  
pp. 719-726
Author(s):  
Hai Xiong Wang ◽  
Ji Bin Li ◽  
Hai Jun Liu ◽  
Chang Sheng Wang
Keyword(s):  
Mathematical Models ◽  
Hot Rolling ◽  
Rolling Process ◽  
Production Quality ◽  
Aluminum Plate ◽  
Test Results ◽  
Rolling Schedule ◽  
Schedule Optimization ◽  
Plate Rolling ◽  
Rolling Production

In order to carry out automatic transformation to the two-roll reversible hot-rolling mill of a aluminum plate production factory, firstly a series of mathematical models of aluminum plate hot-rolling parameters are established, then a new optimization algorithm which is suitable for aluminum plate rolling production combined with the various constraints in the rolling process is proposed, and rolling schedule optimization software system is developed. Finally, by measuring the process parameters in rolling production site and applying the optimized rolling schedule to the rolling production, many test data are obtained. The analysis of test results and evaluation of the practical production show that the mathematical models established have high accuracy compared with the old rolling schedule. The optimization schedule can not only ensure the production quality, but also has higher efficiency and less energy consumption.

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.

scholarly journals Numerical Simulation of the Hot Rolling Process of Steel Beams

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7038
Author(s):  
Alejandro Pérez-Alvarado ◽  
Sixtos Antonio Arreola-Villa ◽  
Ismael Calderón-Ramos ◽  
Rumualdo Servín Castañeda ◽  
Luis Alberto Mendoza de la Rosa ◽  
...  
Keyword(s):  
Cross Section ◽  
Hot Rolling ◽  
Rolling Process ◽  
Steel Beams ◽  
Rolling Schedule ◽  
Cross Sectional ◽  
Hot Rolling Process ◽  
First Case ◽  
Minimal Reduction ◽  
Reduction In Area

The complete rolling schedule (25 passes) of steel beams in a mill was simulated to predict the final beam length, geometry of the cross-section, effective stress, effective plastic strain and rolling power for two cases; the first case corresponds to the hot rolling process assuming a constant temperature of 1200 ∘C. The simulation of the second case considered the real beam temperature at each pass to compare the results with in-plant measurements and validate the numerical model. Then, the results of both cases were compared to determine the critical passes of the process with high peaks of required power, coinciding with the reports at the mill. These critical passes share the same conditions, high percentage of reduction in cross-sectional area and low beam temperature. Additionally, a potential reduction of passes in the process was proposed identifying passes with low required power, minimal reduction in area of cross-section and essentially unchanged geometry. Therefore, it is reasonable to state that using the present research methodology, it is possible to have a better control of the process allowing innovation in the production of profiles with more complex geometries and new materials.

Transfer Model of Transverse Asymmetry Characteristic in Standers during the Steady Hot Rolling Stage

2010 ◽  
Vol 44-47 ◽  
pp. 1039-1043 ◽  
Author(s):  
Xian Qiong Zhao ◽  
Yi Lun Liu ◽  
Sheng Huang
Keyword(s):  
Hot Rolling ◽  
Characteristic Parameter ◽  
Rolling Process ◽  
Asymmetry Factor ◽  
Transfer Model ◽  
Hot Rolling Process ◽  
Failure State ◽  
Disturbance Factor ◽  
Rolling Production ◽  
Rolling Stage

During the hot rolling process, the perturbation of transverse asymmetry factor will generate strip steering, strip delivery wedge and other failure state. During the steady rolling stage, the constraint action of tension and so on can restrain strip steering. Transverse asymmetry characteristic mainly passes in the form of strip delivery wedge between the standers. Firstly this paper researches correlation of transverse asymmetry characteristic parameter toward single stander, establishes a function model to reflect transverse asymmetry result status, for instance strip delivery wedge, strip entry wedge, strip eccentric, gap wedge and other transverse asymmetry disturbance factor. Then the paper establishes transfer model of transverse asymmetry characteristic between standers, gets result status of strip delivery wedge between each ensuing standers under strip entry wedge, strip eccentric, gap wedge and other combination of disturbance. At last the paper takes working condition of actual aluminum hot rolling production line as an example, computes transfer coefficient of strip delivery wedge under several perturbation and discuss transfer discipline of transverse asymmetry characteristic between standers.

Investigation of influence of plate rolling parameters on the product quality

2020 ◽  
Vol 76 (6) ◽  
pp. 591-601
Author(s):  
A. Kawalek ◽  
H. Dyja ◽  
K. Ozhmegov
Keyword(s):  
Numerical Simulation ◽  
Hot Rolling ◽  
Deformation Zone ◽  
Rolling Mill ◽  
Metal Flow ◽  
Rolling Process ◽  
Asymmetric Rolling ◽  
Auxiliary Equipment ◽  
Plate Rolling ◽  
Work Rolls

During plate rolling in most cases a breakdown of symmetry conditions of the strip deformation relative to the upper and lower rolls takes place. The rolling process becomes an asymmetric one. This phenomenon causes an adverse bending of the strip towards the lower or upper roll. Subsequent finishing operations do not ensure the exclusion of the deformed (wavy) shape, since the strip has a high rigidity. With this production, large technological waste, associated with the undulation of the front end of the strip arises. In addition, the work rolls of the rolling mill and auxiliary equipment are subject to increased wear. The introduction of controlled asymmetry into the rolling process by differentiating speed of rotation of the work rolls can be one of the ways to prevent this phenomenon. Using of asymmetry allows to change the stress and strain state in the deformation zone. This method does not increase the load on the rolling stand and the gear of the rolling mill. The paper presents results of investigation of plate rolling parameters (billet feeding angle, degree of deformation, value of the asymmetry coefficient of rolls rotation speed) on the strip curvature. The work was carried out according to conditions of hot rolling of steel grade S355J2+N. For numerical simulation of the rolling process the coefficients of the Hensel–Spittel function were refined. The authors conducted a study of rolling of plates using two types of asymmetry, a geometric (as a result of feeding the workpiece at an angle) and a kinetic (by changing the speed of rotation of individual rolls). The analysis of the results was carried out using numerical simulation based on the modern Forge soft- ware package. According to the results of the work, an analysis of the influence of the parameters of plates hot rolling on the metal flow in the deformation zone is presented. The conditions for reducing the curvature of the end of the strip are determined. The expediency of introducing a controlled asymmetric rolling process by application of different speeds of rotation of the work rolls is shown.

Study on the Slab Rolling Force Based on Thermal-Mechanical Coupling Analysis

2014 ◽  
Vol 536-537 ◽  
pp. 1460-1463
Author(s):  
Zhao Wei Dong ◽  
Xiao Hang Wan ◽  
Zhan Ping Huang ◽  
Sheng Yong Liu
Keyword(s):  
Production Efficiency ◽  
Rolling Force ◽  
Rolling Process ◽  
Mechanical Analysis ◽  
Production Quality ◽  
Analysis Model ◽  
Mechanical Coupling ◽  
Plate Rolling ◽  
Thermal Mechanical Analysis ◽  
Rolling Efficiency

In order to increase rolling efficiency and production quality, adopted the finite element method, the rolling force analysis model of 3500mm rolling mill is established in this paper based on the thermal mechanical analysis theory, According to the rolling technology parameters in actual production, the rolling process of plate rolling is systematic studied, which thinks about the thermal stress caused by uneven temperature distribution. The law of technology parameters influencing rolling force is gained, which uses in the optimization of rolling process, improves production efficiency. it has important significance to reduce the energy consumption.

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

scholarly journals 3D-FEM Simulation of Hot Rolling Process and Characterization of the Resultant Microstructure of a Light-Weight Mn Steel

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 569
Author(s):  
Ana Claudia González-Castillo ◽  
José de Jesús Cruz-Rivera ◽  
Mitsuo Osvaldo Ramos-Azpeitia ◽  
Pedro Garnica-González ◽  
Carlos Gamaliel Garay-Reyes ◽  
...  
Keyword(s):  
Hot Rolling ◽  
Thermomechanical Processing ◽  
Computational Simulation ◽  
Effective Strain ◽  
Fem Simulation ◽  
Rolling Process ◽  
3D Fem ◽  
Hot Rolling Process ◽  
Mn Steel

Computational simulation has become more important in the design of thermomechanical processing since it allows the optimization of associated parameters such as temperature, stresses, strains and phase transformations. This work presents the results of the three-dimensional Finite Element Method (FEM) simulation of the hot rolling process of a medium Mn steel using DEFORM-3D software. Temperature and effective strain distribution in the surface and center of the sheet were analyzed for different rolling passes; also the change in damage factor was evaluated. According to the hot rolling simulation results, experimental hot rolling parameters were established in order to obtain the desired microstructure avoiding the presence of ferrite precipitation during the process. The microstructural characterization of the hot rolled steel was carried out using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that the phases present in the steel after hot rolling are austenite and α′-martensite. Additionally, to understand the mechanical behavior, tensile tests were performed and concluded that this new steel can be catalogued in the third automotive generation.

scholarly journals Intelligent methods for root cause analysis behind the center line deviation of the steel strip

2020 ◽  
Vol 10 (1) ◽  
pp. 386-393
Author(s):  
Henna Tiensuu ◽  
Satu Tamminen ◽  
Olli Haapala ◽  
Juha Röning
Keyword(s):  
Hot Rolling ◽  
Steel Strip ◽  
Decision Support Tool ◽  
Rolling Process ◽  
Statistical Prediction ◽  
Center Line ◽  
Quality Model ◽  
Critical Feature ◽  
Support Tool ◽  
Shape Errors

AbstractThis article presents a statistical prediction model-based intelligent decision support tool for center line deviation monitoring. Data mining methods enable the data driven manufacturing. They also help to understand the manufacturing process and to test different hypotheses. In this study, the original assumption was that the shape of the strip during the hot rolling has a strong effect on the behaviour of the steel strip in Rolling, Annealing and Pickling line (RAP). Our goal is to provide information that enables to react well in advance to strips with challenging shape. In this article, we show that the most critical shape errors arising in hot rolling process will be transferred to critical errors in RAP-line process as well. In addition, our results reveal that the most critical feature characterizes the deviation better than the currently used criterion for rework. The developed model enables the user to understand better the quality of the products, how the process works, and how the quality model predicts and performs.

Failure Analysis of a Working Roll Under the Influence of the Stress Field Due to Hot Rolling Process

2021 ◽  
Author(s):  
Reza Masoudi Nejad ◽  
Peyman Noroozian Rizi ◽  
Maedeh Sadat Zoei ◽  
Karim Aliakbari ◽  
Hossein Ghasemi
Keyword(s):  
Stress Field ◽  
Failure Analysis ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process
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