A simplified mathematical model for total temperature rise calculation in non-oriented silicon steel cold rolling deformation zone

2021 ◽  
Vol 119 (1) ◽  
pp. 104
Author(s):  
Guomin Han ◽  
Hongbo Li ◽  
Yujin Liu ◽  
Jie Zhang ◽  
Ning Kong ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Temperature Rise ◽  
Deformation Zone ◽  
Rolling Force ◽  
Silicon Steel ◽  
Initial Model ◽  
Contact Heat ◽  
Friction Heat ◽  
Total Temperature ◽  
Rolling Deformation

In tandem cold rolling, the control of the temperature of high-grade non-oriented silicon steel is a difficult problem for its large deformation resistance and the preheating procedure before rolling. And it is complicated to calculate the total temperature rise of rolling deformation zone due to the comprehensive influence of the plastic deformation heat, the friction heat and the contact heat loss. So, to precisely calculate the total temperature rise, firstly, based on the four classical cold rolling force formulas, the initial total temperature rise calculation models are established correspondingly by theoretically analyzing the temperature rise of deformation heat, the temperature rise of friction heat and the temperature drop of contact heat loss; then, the model based on the improved Lian rolling force formula is adopted, which leads to calculated best matching the measured temperature; finally, considering the complex formula calculation of the initial model, based on the influences of different rolling parameters on the total temperature rise, a simplified model for convenient calculation is proposed by the nonlinear regression analysis of the initial model calculation results and main rolling parameters, which is convenient for the actual application by the field technicians.

The analytic study on the heavy steel plate snake rolling with the different roll diameters

2019 ◽  
Vol 116 (4) ◽  
pp. 402 ◽  
Author(s):  
Qing-cheng Meng ◽  
Lian-yun Jiang ◽  
Li-feng Ma ◽  
Jun-yi Lei
Keyword(s):  
Shear Zone ◽  
Deformation Zone ◽  
Steel Plate ◽  
Rolling Force ◽  
Slip Zone ◽  
Mechanical Parameters ◽  
Rolling Method ◽  
Rolling Torque ◽  
Inner Region ◽  
Rolling Deformation

The deformation in the inner region along the thickness of the heavy steel plate can be improved by snake rolling method. Then the microstructure and property will be refined and the crack in the inner region may be avoided. So the in-depth research on snake rolling method mechanics parameter modeling should be conducted to guide production. The rolling deformation zone will be divided into back slip zone, cross shear zone, front slip zone and reverse deflection zone according to the direction of the friction during the snake rolling process. The four zones may not exist at the same time. The boundary conditions of existence of the back slip zone, cross shear zone and front slip zone were established by calculating the position of neutral point by a special method. The calculating models which were used to calculate the snake rolling mechanical parameters including the rolling force and rolling torque were setup. The calculated models of unit compressive pressure in the four zones were setup by the slab method, and at this basis, the accurate calculating models of the rolling force and rolling torque were setup according to the composition of the rolling deformation zone and the boundary condition. The mechanical parameters were calculated by the analytic method and the numerical method, and the relative deviation is less than 5% which can satisfy the industrial requirement. The present analytical model can predict the characteristics during snake rolling easily and quickly and it is also suitable for online control applications.

Improvement of numerical methods of contact stress calculation during cold rolling of band

2020 ◽  
Vol 0 (10) ◽  
pp. 58-61
Author(s):  
K. V. Ilyin ◽  
◽  
G. L. Baranov ◽  
Keyword(s):  
Numerical Methods ◽  
Cold Rolling ◽  
Contact Stress ◽  
Contact Surface ◽  
Deformation Zone ◽  
Rolling Force ◽  
Surface Shape ◽  
Stress Calculation ◽  
Billet Material ◽  
Strain Strengthening

The influence of a contact surface shape of the deformation zone during cold rolling of a band on the rolling force subject to parameters of the strain strengthening curve of billet material and band tension has been studied by numerical methods. The comparison of the obtained results and well-known ones allowed one to set that in case of the presense of strain strengthening, the replacement of the arc of contact by the chord resulted in a decrease in calculated force of rolling, whose value depends on the presence of the fore tension and the back tension and parameters of strain strengthening of metal.

The Rolling Deformation Characteristics of Rail with Corrugated Web

2014 ◽  
Vol 898 ◽  
pp. 197-200
Author(s):  
Jin Hong Ma ◽  
Bin Tao ◽  
Xiao Han Yao
Keyword(s):  
Deformation Zone ◽  
Rolling Force ◽  
Research Result ◽  
Rolling Process ◽  
Special Structure ◽  
Deformation Characteristics ◽  
Corrugated Web ◽  
H Beam ◽  
Rail Structure ◽  
Rolling Deformation

Applying the research result of the whole corrugated web H-beam to rail structure, a new kind of rail structure, the corrugated web rail was generated. The special structure rail was successfully rolled in the Research Mill Institute of Yanshan University. This experiment proved that rolling force of corrugated web rail was greater. Based on the software ANSYS/LS-DYNY, the rolling process of corrugated web rail is simulated. Comparing with rolling traditional rail, nip condition, deformation zone, elongation modulus, zone of slippage on the delivery side and on the entry side of rolling corrugated web rail are analyzed, Through the analysis of the character of rolling corrugated web rail, the reason of greater rolling force is found out.

scholarly journals Twinning Behavior in Cold-Rolling Ultra-Thin Grain-Oriented Silicon Steel

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 187
Author(s):  
Bo Zhang ◽  
Li Meng ◽  
Guang Ma ◽  
Ning Zhang ◽  
Guobao Li ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Process ◽  
Silicon Steel ◽  
Mechanical Work ◽  
Area Fraction ◽  
Raw Material ◽  
Rolling Reduction ◽  
Cold Rolling Reduction ◽  
Schmid Factor ◽  
Twinning System

Twinning behaviors in grains during cold rolling have been systematically studied in preparing ultra-thin grain-oriented silicon steel (UTGO) using a commercial glassless grain-oriented silicon steel as raw material. It is found that the twinning system with the maximum Schmid factor and shear mechanical work would be activated. The area fraction of twins increased with the cold rolling reduction. The orientations of twins mainly appeared to be α-fiber (<110>//RD), most of which were {001}<110> orientation. Analysis via combining deformation orientation simulation and twinning orientation calculation suggested that {001}<110> oriented twinning occurred at 40–50% rolling reduction. The simulation also confirmed more {100} <011> oriented twins would be produced in the cold rolling process and their orientation also showed less deviation from ideal {001}<110> orientation when a raw material with a higher content of exact Goss oriented grains was used.

FEM Analysis of Profile Control Capability during Rolling in a 6-High CVC Cold Rolling Mill

2014 ◽  
Vol 988 ◽  
pp. 257-262 ◽  
Author(s):  
Ke Zhi Linghu ◽  
Zheng Yi Jiang ◽  
Fei Li ◽  
Jing Wei Zhao ◽  
Meng Yu ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Rolling Force ◽  
Fem Analysis ◽  
Continuous Variable ◽  
Cold Rolling Mill ◽  
Strip Rolling ◽  
Roll Bending ◽  
Profile Control ◽  
Control Capability

A 3D elastic-plastic finite element method (FEM) model of cold strip rolling for 6-high continuous variable crown (CVC) rolling mill was developed. The rolling force distributions were obtained by the internal iteration processes. The calculated error has been significantly reduced by the developed model. the absolute error between the simulated results and the actual values is obtained to be less than 10μm, and relative error is less than 1%. The developed model is significant in investigating the profile control capability of the CVC cold rolling mill in terms of work roll bending, intermediate roll bending and intermediate roll shifting.

Tailoring elastic admissible strain of TiZr alloy by cold rolling deformation

2019 ◽  
Vol 781 ◽  
pp. 504-507 ◽  
Author(s):  
G.S. Zhang ◽  
Q. Zhang ◽  
K.F. Li ◽  
Y.B. Cao ◽  
M. Li ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Deformation

scholarly journals Superelasticity Evaluation of the Biocompatible Ti-17Nb-6Ta Alloy

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Alaa Keshtta ◽  
Mohamed A.-H. Gepreel
Keyword(s):  
Fracture Surface ◽  
Cold Rolling ◽  
Shape Memory ◽  
Tensile Testing ◽  
Martensite Phase ◽  
Healthcare Applications ◽  
Ti Alloys ◽  
Alloy Microstructure ◽  
Two Phases ◽  
Rolling Deformation

Recently, studying the shape memory effect of the biocompatible Ti alloys takes much attention in the biomedical and healthcare applications. This study concerns about characterizing the superelasticity of the new biocompatible Ti-17Nb-6Ta (TNT) alloy. Microstructure of TNT was observed using optical and confocal microscopes. The alloy consists of two phases: β (predominant phase) and α″ martensite phase. The influence of cold rolling deformation on the microstructure was illustrated in which the martensitic-induced transformation appeared by cold rolling. The alloy is ductile as only the fracture dimples appeared in its fracture surface. Multicyclic loading and deloading tensile testing was applied to TNT specimens (flat and wire shapes) in order to evaluate the superelasticity. A superelastic strain as high as 3.5% was recorded for this TNT alloy. Therefore, TNT alloy has high potential for many biomedical and healthcare applications.

scholarly journals Multiscale study of cold-rolling deformation on mechanical and corrosion behaviors of AA2024-T4 aluminum alloy

2021 ◽  
pp. 100307
Author(s):  
Sofia Benamirouche ◽  
Abderrezak Abdi ◽  
Larbi Hemmouche ◽  
Alberto Mejias ◽  
Mohamed El Amine Belouchrani ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Cold Rolling ◽  
Corrosion Behaviors ◽  
Rolling Deformation
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