Calculation Model for Thermal Crown of Work Roll in Hot Strip Rolling

2014 ◽  
Vol 926-930 ◽  
pp. 763-766 ◽  
Author(s):  
Zi Ying Liu ◽  
Yan Guang Sun ◽  
Xiang Rong Song
Keyword(s):  
Temperature Field ◽  
Surface Temperature ◽  
Work Roll ◽  
Calculation Model ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Strip Shape ◽  
Hot Strip ◽  
Thermal Crown

The finite difference method model of temperature field and thermal crown of work roll on hot strip mill was researched. The temperature field and thermal crown were calculated, surface temperature distribution and thermal deformation were both reduced from center to edge. The computed and measured roll surface temperature were comparatively in good agreement with each other, practical application results show that the model has high calculating speed, high precision and can meet the needs of the strip shape on-line process control.

Strip Width Model in Hot Strip Rolling

2014 ◽  
Vol 926-930 ◽  
pp. 856-859
Author(s):  
Kai Wu ◽  
Xiang Rong Song ◽  
Zi Ying Liu
Keyword(s):  
Calculation Model ◽  
Strip Width ◽  
Good Effect ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Practical Applications ◽  
Hot Strip ◽  
Flat Rolling ◽  
Physical Phenomena

This paper has researched strip width model in hot strip rolling. Analyzed physical phenomena influencing strip width, established calculation model in production including width spread during flat rolling, width change induced by bending, width changed by high temperature creep and thermal expansion and contraction during rolling. Practical applications in domestic 1500 hot strip mill show that the width model achieved good effect and enhanced the calculation precision.

Computational Model of Work Roll Temperature Distribution during Hot Strip Rolling Process

2012 ◽  
Vol 229-231 ◽  
pp. 2432-2435
Author(s):  
Xing Dong Li ◽  
Yan Xia Shan ◽  
Chang Hong Guo
Keyword(s):  
Computational Models ◽  
Work Roll ◽  
Rolling Process ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Roll Temperature ◽  
Hot Strip ◽  
Temperature Field Model ◽  
Deformation Work

Computational models of deformation and friction work were established by dividing contact arc between strip and work roll into two sliding regions, two braking regions and one stagnating region. A two dimensional temperature field model of work roll was established by finite difference method according to practical boundary conditions. Simulation results show that with the increase of rolling pass, deformation work reduced while friction work increased, except that deformation and friction works at the last pass were the least. The computed rolling forces and work roll surface temperatures agree well with measured values collected from a hot strip mill.

Finite Element Analysis of Temperature and Crown of Rolls in Hot Strip Rolling

2009 ◽  
Vol 16-19 ◽  
pp. 575-579 ◽  
Author(s):  
Da Le Sun ◽  
Jian Guo Zhao ◽  
Liang Yu Chen
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Work Roll ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Element Analysis ◽  
Rolling Mills ◽  
Hot Strip ◽  
Thermal Crown ◽  
Work Rolls

In this paper a three-dimensional numerical computation on temperature and crown of rolls in hot strip rolling was evaluated based on finite element method and parallel computation technology with multiple CPUs. A comparison between calculated results and actual data collected from rolling mills was presented, which indicated the high accuracy of the model. The calculated results indicated that a significant impact in thin layer of work roll surface was brought by thermal load, while much weaker in the core. Furthermore, the temperature field and thermal crown of hot mill work rolls would reach a stabilized condition only when several rolling cycle be finished.

Application of Deformation to Improve Hot Ductility in the Peritectic Steel

2005 ◽  
Vol 500-501 ◽  
pp. 203-210 ◽  
Author(s):  
Ahmad Rezaeian ◽  
Faramarz Zarandi ◽  
D.Q. Bai ◽  
Steve Yue
Keyword(s):  
Flow Stress ◽  
High Strength ◽  
Microalloyed Steels ◽  
Hot Strip Mill ◽  
Mean Flow ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Slip Ratio ◽  
Hot Strip ◽  
Mean Flow Stress

The hot strip rolling of advanced microalloyed high strength steels still represents a new task to many mills due to the lack of data on the hot deformation resistance. With the aid of processing data from the Ispat-Inland hot strip mill, the “measured mean flow stresses” are calculated from the mill force using the Sims analysis and taking into account roll flattening, slip ratio and the redundant strain. A modification of the Misaka mean flow stress equation is proposed for C – Mn – Si – Al steels microalloyed with up to 0.02 % Nb. The effects of alloying and microalloying are then estimated. A new fitting parameter shows excellent agreement with the mean flow stress data from industrial processing of advanced high strength microalloyed steels. However, during the second half of the rolling schedule (lower temperature region), indications of austeniteto- ferrite transformation were found.

scholarly journals Effects of Rolling Condition on the Surface Temperature of Work Roll in Hot Strip Mill

1976 ◽  
Vol 16 (10) ◽  
pp. 551-560 ◽  
Author(s):  
Yasuhiro SEKIMOTO ◽  
Morimichi TANAKA ◽  
Ryozo SAWADA ◽  
Masayoshi KOGA
Keyword(s):  
Surface Temperature ◽  
Work Roll ◽  
Hot Strip Mill ◽  
Rolling Condition ◽  
Hot Strip

An FE Based On-line Model for the Prediction of Work Roll Thermal Profile in Hot Strip Rolling

2010 ◽  
Author(s):  
Ji Won Choi ◽  
Jung Hyeung Lee ◽  
Cheng Gang Sun ◽  
Sang Moo Hwang ◽  
F. Barlat ◽  
...  
Keyword(s):  
Work Roll ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Thermal Profile ◽  
Line Model ◽  
Hot Strip ◽  
On Line

scholarly journals On the Evolution of Temperature and Combined Stress in a Work Roll under Cyclic Thermo-Mechanical Loadings during Hot Strip Rolling and Idling

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5054
Author(s):  
Kejun Hu ◽  
Qinghe Shi ◽  
Wenqin Han ◽  
Fuxian Zhu ◽  
Jufang Chen
Keyword(s):  
Thermal Stress ◽  
Hot Rolling ◽  
Work Roll ◽  
Rolling Process ◽  
Roll Surface ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Hot Strip ◽  
Calculation Results ◽  
Work Rolls

An accurate prediction of temperature and stress evolution in work rolls is crucial to assess the service life of the work roll. In this paper, a finite element method (FEM) model with a deformable work roll and a meshed, rigid body considering complex thermal boundary conditions over the roll surface is proposed to assess the temperature and the thermal stress in work rolls during hot rolling and subsequent idling. After that, work rolls affected by the combined action of temperature gradient and rolling pressure are investigated by taking account of the hot strip. The accuracy of the proposed model is verified through comparison with the calculation results obtained from the mathematical model. The results show that thermal stress is dominant in the bite region of work rolls during hot rolling. Afterwards, the heat treatment residual stresses which are related to thermal fatigue are simulated and introduced into the work roll as the initial stress to evaluate the redistribution under the thermal cyclic loads during the hot rolling process. Results show that the residual stress significantly changed near the roll surface.

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