scholarly journals Analytical inverse solution for coupled thermoelastic problem for the evaluation of contact stress during steel strip rolling

2013 ◽  
Vol 37 (4) ◽  
pp. 2212-2229 ◽  
Author(s):  
Daniel Weisz-Patrault ◽  
Alain Ehrlacher ◽  
Nicolas Legrand
Keyword(s):  
Contact Stress ◽  
Steel Strip ◽  
Inverse Solution ◽  
Thermoelastic Problem ◽  
Strip Rolling

scholarly journals A new sensor for the evaluation of contact stress by inverse analysis during steel strip rolling

2011 ◽  
Vol 211 (9) ◽  
pp. 1500-1509 ◽  
Author(s):  
Daniel Weisz-Patrault ◽  
Alain Ehrlacher ◽  
Nicolas Legrand
Keyword(s):  
Contact Stress ◽  
Inverse Analysis ◽  
Steel Strip ◽  
Strip Rolling

scholarly journals Analysis of Roll Gap Heat Transfers in Hot Steel Strip Rolling through Roll Temperature Sensors and Heat Transfer Models

2012 ◽  
Vol 504-506 ◽  
pp. 1043-1048 ◽  
Author(s):  
Nicolas Legrand ◽  
Nathalie Labbe ◽  
Daniel Weisz-Patrault ◽  
Alain Ehrlacher ◽  
Tomasz Luks ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Steel Strip ◽  
Temperature Sensors ◽  
Strip Rolling ◽  
Strip Surface ◽  
Roll Temperature ◽  
Heat Transfers ◽  
Roll Gap ◽  
Roll Bite ◽  
Transfer Models

This paper presents an analysis of roll bite heat transfers during hot steel strip rolling. Two types of temperature sensors (drilled sensor /slot sensor) implemented near roll surface and heat transfer models are used to identify in the roll bite interfacial heat flux, temperature and Heat Transfer Coefficient HTCroll-bite during pilot rolling tests. It is shown that: - the slot type sensor is much more efficient than the drilled type sensor to capture correctly fast roll temperature changes in the bite during hot rolling but life’s duration of the slot sensor is shorter. - average HTCroll-bite, identified with roll sensors temperature signals is within the range 15-26 kW/m2/K: the higher the strip reduction is, the higher the HTCroll-bite is. - scale thickness at strip surface tends to decrease heat transfers from strip to roll in the roll bite. - HTCroll-bite appears not uniform along the roll-strip contact, in contrast to usual assumptions made in existing models - Heat dissipated by friction at roll-strip interface and its partitioning through roll and strip respectively seems over-estimated in the existing thermal roll gap model [1]. Modeling of interfacial friction heat dissipation should be reviewed and verified. The above results show the interest of roll temperature sensors to determine accurately roll bite heat transfers and evaluate more precisely the corresponding roll thermal fatigue degradation.

Analysis and characterisation of ultra-fine ferrite produced during a new steel strip rolling process

1999 ◽  
Vol 40 (4) ◽  
pp. 433-438 ◽  
Author(s):  
P.J. Hurley ◽  
P.D. Hodgson ◽  
B.C. Muddle
Keyword(s):  
Steel Strip ◽  
Rolling Process ◽  
Strip Rolling

scholarly journals Behaviour of oxide scales in hot steel strip rolling

2008 ◽  
Vol 1 (S1) ◽  
pp. 1227-1230 ◽  
Author(s):  
C. Grenier ◽  
P.-O. Bouchard ◽  
P. Montmitonnet ◽  
M. Picard
Keyword(s):  
Steel Strip ◽  
Oxide Scales ◽  
Strip Rolling

scholarly journals Experimental Study on Adhesion of Oxide Scale on Hot-Rolled Steel Strip

2012 ◽  
Vol 472-475 ◽  
pp. 622-625 ◽  
Author(s):  
Xiang Long Yu ◽  
Dong Bin Wei ◽  
Xiao Dong Wang ◽  
Zheng Yi Jiang
Keyword(s):  
Oxide Scale ◽  
Steel Strip ◽  
Low Carbon Steel ◽  
Physicochemical Characteristics ◽  
Oxide Scales ◽  
Low Carbon ◽  
Laminar Cooling ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Gleeble 3500

An experimental method was developed to study the adherence properties of the oxide scale formed on microalloyed low carbon steel after hot strip rolling. The evolution of the oxide scale during laminar cooling was investigated using Gleeble 3500 Thermal-Mechanical Simulator connected with a humid air generator. After the sample cooled down to ambient temperature, the oxide scale was protected by lacquer to prevent the scale from losing. Physicochemical characteristics of the oxide scale were examined and the adherence mechanism was discussed. Decomposed wustite a mixture of α-iron and magnetite (Fe3O4), can substantially improve the integrity of oxide scale. However, large quantities of hematite (Fe2O3) or retained wustite (FeO) were found detrimental to the adhesion of the oxide scale. It is found that the adherence of oxide scales significantly depends on the phase composition of oxide scales with different thickness.

Control Systems for Strip Rolling Mills

1977 ◽  
Vol 10 (11) ◽  
pp. 433-437
Author(s):  
J. R. Leigh
Keyword(s):  
Control System ◽  
Control Systems ◽  
Steel Strip ◽  
Economic Benefits ◽  
General Interest ◽  
Plant Design ◽  
Strip Rolling ◽  
Production Complex ◽  
Improved Design ◽  
Hot And Cold Rolling

The paper considers the need for control systems in the hot and cold rolling of steel strip. It is not intended for steel specialists, but is a broad case study designed to illustrate two important points of general interest to control engineers. (i) Every control loop is present in order to correct for some deviation from ideal behaviour in the plant or the plant inputs. This is a useful and systematic initial approach to the problem of designing the overall control system configuration for a particular process. (ii) The need for each type of control implied in (i) can be minimised or eliminated by proper design of the plant or by proper choice of operational procedures. This is a quite general statement and it leads to the view: Control systems engineers should be involved in the planning and design of new plant, so that an economically wise choice can be made between expenditure on improved design and expenditure on improved control. Three units of plant, which together constitute a closely linked production complex, are considered together and an analysis made of their potential for improvement by the application of control systems. Possible economic benefits are first listed and then reasons for deviation from ideal behaviour are discussed. Each deviation from ideal behaviour can be corrected either by changes in plant design or operation or by the application of improved control. An outline is given of the types of control system required to correct deviations in this configuration. In particular, the problem of control of strip flatness is discussed since this is the most innovative part of the work.

scholarly journals Experimental Study of Interfacial Heat Flux and Surface Temperature by Inverse Analysis with Thermocouple (Fully Embedded) during Hot Steel Strip Rolling

2012 ◽  
Vol 452-453 ◽  
pp. 959-963 ◽  
Author(s):  
Daniel Weisz-Patrault ◽  
Alain Ehrlacher ◽  
Nicolas Legrand ◽  
Nathalie Labbe ◽  
Jaroslav Horský ◽  
...  
Keyword(s):  
Heat Flux ◽  
Surface Temperature ◽  
Steel Strip ◽  
Theoretical Models ◽  
Calibration Procedure ◽  
Rolling Process ◽  
Fundamental Aspect ◽  
Strip Rolling ◽  
Interfacial Heat Flux ◽  
Good Agreement

Knowledge of temperature distribution in the roll is fundamental aspect in cold rolling. An inverse analytical method has been previously developed to determine interfacial heat flux and surface temperature by measuring the temperature with a thermocouple (fully embedded) at only one point inside the roll. On this basis some pilot mill tests have been performed. The temperature sensor, the calibration procedure and rolling tests at different strip rolling conditions (5%, 10%, 15% and 20%) are described. Results show a good agreement with well-known theoretical models. Moreover the CPU times of the method (around 0.05 s by cycle) enable an online control of the rolling process.

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