A Model to Minimize the Hot Rolling Time of a Steel Slab Considering the Steel’s Chemical Composition

2008 ◽  
pp. 471-480
Author(s):  
Carlos A. Hernández Carreón ◽  
Héctor J. Fraire-Huacuja ◽  
Karla Espriella Fernandez ◽  
Guadalupe Castilla-Valdez ◽  
Juana E. Mancilla Tolama
Keyword(s):  
Chemical Composition ◽  
Hot Rolling ◽  
Steel Slab

Development of Hot Rolling Schedules for Lean Alloyed Pipeline Steel X80 Produced on Continuous Mill 2000

2014 ◽  
Vol 783-786 ◽  
pp. 938-943 ◽  
Author(s):  
Anton A. Naumov ◽  
Yuriy A. Bezobrazov ◽  
Evgenii V. Chernikov
Keyword(s):  
Computer Simulation ◽  
Chemical Composition ◽  
Mechanical Testing ◽  
Hot Rolling ◽  
Pipeline Steel ◽  
Microstructure Analysis ◽  
Continuous Mill ◽  
Compression Tests

Analysis of standard and experimental lean alloyed chemical composition for pipeline steel X80 was made. Rolling schedules for experimental X80 chemical composition by means of computer simulation using HSMM, AusEvol+ and AusTran software were developed for continuous mill 2000. Developed schedules were analyzed in order to choose one of them which guarantees the required microstructure receiving. The chosen schedule was realized on Gleeble-3800 system by tension-compression tests for experimental chemical composition. Microstructure analysis and mechanical testing of received samples was made to compare results with requirements submitted to pipeline steel X80.

Numerical Analysis of Thermal Stress Development of Steel Slabs in a Pusher-Type Reheat Furnace

2020 ◽  
Author(s):  
Francisco J. Martinez Zambrano ◽  
Bethany Worl ◽  
Xiang Li ◽  
Armin K. Silaen ◽  
Nicholas Walla ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Hot Rolling ◽  
Radiant Heat ◽  
Rolling Process ◽  
Radiant Heat Transfer ◽  
Steel Product ◽  
Stress Development ◽  
Reheat Furnace ◽  
Hot Rolling Process ◽  
Steel Slab

Abstract During the steelmaking and hot rolling processes, various defects and cracks appear throughout the steel product. These cracks may initiate and grow throughout the hot rolling process and result in a lower quality of the product than is acceptable. The most energy-intensive part of the hot rolling process is the reheating furnace, where slabs are heated up to a target rolling temperature largely through radiant heat transfer. In the reheat furnace, large stresses may develop due to the thermal gradients within the steel product. A thermal-stress analysis is proposed based on finite element method (FEM) to study the impacts of charging temperature, slab velocity, and heating rate on stress development as the steel slab travels through an industrial pusher-type reheat furnace. Furnace zone information is taken from a previously validated computational fluid dynamics (CFD) model and applied as thermal boundaries and constraints within the thermal-stress FEM models. Temperature and stress results were taken at the core, top, bottom, top quarter, and the bottom quarter of the steel slab at different residence times. Moreover, temperature lines and contour plots taken along the length of the slab allow visualization of the gradual development of temperature and identification of the locations corresponding to temperature variations as the slabs move in the furnace. The slab temperature predicted by the FEM model was found valid when compared with industrial data. Stress predictions found similar trends with previously published works as well as evidence of thermal shock in the sub-surface near the beginning of the residence time.

Influence of Hot-Working Conditions on a Structure of X11MnSiAl17-1-3 Steel

2014 ◽  
Vol 1036 ◽  
pp. 122-127 ◽  
Author(s):  
Leszek Adam Dobrzański ◽  
Małgorzata Czaja ◽  
Wojciech Borek ◽  
Krzysztof Labisz ◽  
Tomasz Tański
Keyword(s):  
Chemical Composition ◽  
Working Conditions ◽  
Hot Rolling ◽  
Mechanical Treatment ◽  
Static Recrystallization ◽  
Isothermal Holding ◽  
Austenitic Steels ◽  
Air Cooling ◽  
High Manganese ◽  
Thermo Mechanical Treatment

The investigations are focused on high-manganese austenitic steels used for reinforcing elements of car body. The purpose of this work was to examine the influence of thermo-mechanical treatment workout using Gleeble simulator and LPS module for semi-industrial hot-rolling on the structure and transformations occurring during cold deformations. Thermo-mechanical treatment consists of four passovers with a planned strain rate of about 20%. There were three variants of cooling after thermo-mechanical treatment: cooling in water, natural air-cooling and cooling in water after isothermal holding in the temperature of last deformation 850°C for 30 s. Structural observation were carried on LEICA MEF4A light microscope, analysis of the chemical composition were made with XPert PRO diffractometer, and the results were analyzed with OriginLab. It was found that the high-manganese austenitic X11MnSiAl7-1-3 steel after thermo-mechanical treatment on Gleeble simulator is characterized by dynamically recrystallized structure. In intervals time between each compression metadynamic and static recrystallization take place. After hot-rolling these steels has austenitic structure with dynamically recovered grains and with small metadynamically and statically recrystallized grains that are located on a border of elongated grains of austenite.

Temperature Distribution in a Slab During Hot Rolling

1988 ◽  
Vol 110 (1) ◽  
pp. 17-21 ◽  
Author(s):  
A. N. Karagiozis ◽  
J. G. Lenard
Keyword(s):  
Temperature Distribution ◽  
Hot Rolling ◽  
Initial Temperature ◽  
Rolling Reduction ◽  
Steel Slab ◽  
Different Parts

The dependence of the temperature distribution during hot rolling of a steel slab on the speed of rolling, reduction and initial temperature is investigated. It is observed that while the center of the slab cools, the surface loses heat at a much higher rate following which significant reheating occurs. Because of that different parts of the slab receive significantly different thermal-mechanical treatments, possibly resulting in a nonhomogeneous product.

Influence of Vanadium Microaddition on the Microstructure and Mechanical Properties of High Strength Large Diameter Wire-Rods

2005 ◽  
Vol 500-501 ◽  
pp. 761-770 ◽  
Author(s):  
L. Mendizabal ◽  
Amaia Iza-Mendia ◽  
Beatriz López ◽  
J.M. Rodriguez-Ibabe
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Hot Rolling ◽  
Precipitation Hardening ◽  
Large Diameter ◽  
High Strength ◽  
Unit Size ◽  
Cooling Conditions ◽  
Microstructure And Mechanical Properties ◽  
Made In

This paper analyses the application of vanadium microaddition for the production of high strength 16mm diameter wire-rods. Laboratory trials, simulating industrial cooling conditions after hot rolling, were made in a range between 3 and 8°C/s. The results show that introducing vanadium means that it is possible to optimise chemical composition by reducing elements susceptible to segregation. Besides, high strength values are maintained by means of precipitation hardening. The influence of vanadium microalloying on the crystallographic ferrite unit size was also evaluated.

Numerical Simulation on Correcting Camber and Wedge of Steel Slabs in Hot Rolling Mill

2014 ◽  
Vol 626 ◽  
pp. 570-575 ◽  
Author(s):  
Jong Ning Aoh ◽  
Han Kai Hsu ◽  
Wei Ting Dai ◽  
Chun Yen Lin ◽  
Yen Liang Yeh
Keyword(s):  
Hot Rolling ◽  
Rolling Mill ◽  
Rolling Direction ◽  
Rolling Process ◽  
Element Analysis ◽  
Hot Rolling Process ◽  
Steel Slab ◽  
Hot Rolling Mill ◽  
Rolling Load

In the hot rolling process, the steel slab may experience a temperature gradient along its transverse direction which may cause camber and wedge after rolling. Camber and wedge phenomenon will affect the quality of the steel plate. To eliminate camber and wedge phenomenon, a pair of side guides is placed before and behind the hot rolling mill. The position mode and the force mode are the control modes for side guides to correct the slab shape and to guide the slab to follow rolling direction. Finite element analysis using ABAQUS was applied to simulate hot rolling process to find the correction mechanism of rolling equipment. The centerline of slab was traced and the shape of slab was predicted. The difference of rolling load between work side and drive side of roller was determined. Furthermore, the load, stress and velocity distribution on the slab at roll bite were analyzed. By using numerical model, hot rolling parameters including side guide control strategy can be predicted, which can provide the hot rolling line as a guideline to improve the quality of the steel slab.

Effect of TSCR Process on Cold Rolling Texture of Fe-3% Silicon Steels

2010 ◽  
Vol 160-162 ◽  
pp. 488-491
Author(s):  
Yong Mei Yu ◽  
Yuan Xiang Zhang ◽  
Chang Sheng Li ◽  
Guo Dong Wang
Keyword(s):  
Chemical Composition ◽  
Cold Rolling ◽  
Hot Rolling ◽  
Volume Fraction ◽  
Rolling Texture ◽  
Fiber Texture ◽  
Rolling Reduction ◽  
Cold Rolling Strip ◽  
Rolling Strip ◽  
Cold Rolling Texture

The effect of hot rolling parameters including different hot rolling reduction, soaking time of ingots and chemical composition on cold rolling texture by TSCR process was studied. The result indicates that α fibers and γ fiber texture were affected by hot rolling reduction, and oriented density αfibers texture increases with hot rolling reduction rate increasing, and the texture components is same in the surface and different in the center. The strength of γ fiber texture, from {111}<110>to {111}<112>, is decreasing trendency for ingot soaked for 10min and 20min. however, changing trendency from {111}<110>to {111}<112> in 1/8 thickness and 1/4 thickness of cold rolling strip for ingot soaked for 30min. The volume fraction of {111}<112> is rising with the ingot soaked time and the maxium is 3.5 percent, and the volume fraction of {111}<112> is higher in every layer of cold rolling strip whose chemical composition includes Sn than without Sn, the volume fraction of {111}<112> is higher in 1/8 and 1/4 layers than the surface and center layers.

Sign in / Sign up

Export Citation Format

Share Document