scholarly journals Numerical Simulation of Temperature Field and Thermal Stress Field of Work Roll During Hot Strip Rolling

2007 ◽  
Vol 14 (5) ◽  
pp. 18-21 ◽  
Author(s):  
Chang-sheng Li ◽  
Hai-liang Yu ◽  
Guan-yu Deng ◽  
Xiang-hua Liu ◽  
Guo-dong Wang
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Thermal Stress ◽  
Stress Field ◽  
Work Roll ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Hot Strip ◽  
Thermal Stress Field

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.

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.

Numerical Simulation Temperature Field of Laser Cladding Titanium Alloy

2011 ◽  
Vol 117-119 ◽  
pp. 1633-1637
Author(s):  
Guang Yang ◽  
Wei Wang ◽  
Lan Yun Qin ◽  
Xing Lang Wang
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Thermal Stress ◽  
Stress Field ◽  
Molten Pool ◽  
Forming Process ◽  
Thermal Stress Field ◽  
Field Temperature ◽  
Energy Compensation ◽  
Pool Area

Abstract: In order to control the thermal stress of cladding, a numerical simulation of temperature field during multi-track & multi-layer laser metal deposition (LMD) process is developed with ABAQUS based on “element birth and death” technology of FEM. The dynamic variances of temperature field and stress field of forming process are calculated with the energy compensation of interaction between molten pool-powder. The temperature field, temperature gradient, thermal stress field and distribution of residual stress are obtained. The results indicate that although the nodes on different layers are activated at different time, their temperature variations are similar. The temperature gradients of samples are larger near the molten pool area and mainly along z-direction.

Numerical Evaluation of a High Speed Steel Work Roll during Hot Strip Rolling Process

2017 ◽  
Vol 904 ◽  
pp. 55-60 ◽  
Author(s):  
Guan Yu Deng ◽  
Hong Tao Zhu ◽  
A. Kiet Tieu ◽  
Qiang Zhu ◽  
Li Hong Su ◽  
...  
Keyword(s):  
Thermal Stress ◽  
High Speed ◽  
Initial Temperature ◽  
High Speed Steel ◽  
Work Roll ◽  
Rolling Process ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Steel Work ◽  
Hot Strip

Hot strip rolling process is one of the most promising industrial processes to fabricate finished or semi-finished bulk products. Numerical analysis on the temperature and thermal stress distributions in a high speed steel work roll during hot rolling has been conducted based on a transient thermo-mechanical model. Influence of initial work roll body temperature on temperature and thermal stress has been discussed in detail by assuming different rolling stages. Compared to the work roll surface, stress is much smaller at depth of 2.1 mm and 5.0 mm, respectively. Results showed similar maximum circumferential thermal stress at both depths of 2.1 mm and 5.0 mm when the roll has initial temperature of 25 °C and 100 °C, but they are about 3 times and 8 times larger than at depth of 2.1 mm and 5.0 mm, respectively, when the initial temperature is 200 °C.

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