Numerical Modelling of the Cooling Ability of Device for the Plain Round Bars Accelerated Cooling Process

2011 ◽  
Vol 56 (2) ◽  
Author(s):  
K. Laber ◽  
H. Dyja ◽  
M. Kwapisz
Keyword(s):  
Numerical Modelling ◽  
Accelerated Cooling ◽  
Cooling Process ◽  
Cooling Ability

Numerical Modelling of the Cooling Ability of Device for the Plates Accelerated Cooling Process

2013 ◽  
Vol 199 ◽  
pp. 478-483
Author(s):  
Konrad Błażej Laber ◽  
Marcin Knapiński ◽  
Anna Kawałek ◽  
Marcin Kwapisz
Keyword(s):  
Numerical Modelling ◽  
Cross Section ◽  
Rolling Mill ◽  
Rolling Process ◽  
Steel Grade ◽  
Process Research ◽  
Accelerated Cooling ◽  
Cooling Process ◽  
Plate Rolling ◽  
Cooling Ability

The paper presents results of the numerical modelling of the plates accelerated cooling process after the rolling process. Research were carried out for one of the plate rolling mill technological conditions. Presented in the paper research were done for a few variants for X70 steel grade. As a result of the carried out research temperature distribution on the cross section of the cooled plates for the analyzed variants of the accelerated cooling process were obtain.

Theoretical and Experimental Analysis of the Cooling Ability of Device for the Plain Round Bars Accelerated Cooling Process

2012 ◽  
Vol 706-709 ◽  
pp. 2090-2095
Author(s):  
Konrad Błażej Laber ◽  
Henryk Dyja ◽  
Marcin Kwapisz
Keyword(s):  
Heat Exchange ◽  
Rolling Mill ◽  
Rolling Process ◽  
Accelerated Cooling ◽  
Cooling Process ◽  
Bar Rolling ◽  
Average Temperature ◽  
Plain Bars ◽  
Cooling Ability

The paper presents the results of the numerical modelling and industrial research of the cooling ability of the device for the round plain bars accelerated cooling process. Research were carried out for one of the bar rolling mill technological conditions in a few variants. The paper purpose was determination of the cooling ability of device for accelerated cooling process to checking possibility of the using this device in the rolling line, during normalizing rolling process. Investigation results elaborated in the paper made the basis for determination of the heat exchange coefficients between cooled band and water. In the next stage of this paper numerical modeling of the normalizing rolling process with accelerated cooling of band in the final stage of the rolling process was carried out. In this investigation heat exchange coefficients between band and cooling medium (water), which were determinated with allowance of cooling possibilities of investigated device for band accelerated cooling were used. From the obtained results it was found that in the analysed bar rolling mill it is possible to decrease the band average temperature to about 900 °C, which is required during the normalizing rolling process.

Simulation of Cooling Process of Medium Thickness Steel Plate

2008 ◽  
Vol 594 ◽  
pp. 34-38
Author(s):  
Ji Guang Han ◽  
Yang Bai
Keyword(s):  
Heat Transfer ◽  
Simulation Model ◽  
Steel Plate ◽  
Accelerated Cooling ◽  
Mathematics Model ◽  
Cooling Process ◽  
Medium Thickness

By carefully researching and analyzing on cooling process of medium thickness steel plate, a mathematics model of heat transfer and its corresponding simulation model are established and evaluated with finite discrimination for a selected cooling object, and a simulation model is established. Through simulation and locate testing, the calculated values obtained are agreed very well with the measured ones. This indicates that the simulation model can preferably reveal the accelerated cooling process of medium thickness steel plate and can be applied to guide the manufacture of medium thickness steel plate.

Numerical Modelling of the Microstructure during Rolling of Flat Bars

2010 ◽  
Vol 165 ◽  
pp. 382-387
Author(s):  
Piotr Szota ◽  
Andrzej Stefanik ◽  
Henryk Dyja
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Analysis ◽  
Numerical Modelling ◽  
Computer Software ◽  
Rolling Process ◽  
Accelerated Cooling ◽  
Bar Rolling ◽  
Proposed Modification ◽  
Rolling Technology

This paper presents theoretical analysis of microstructure changes in the material during standard rolling and normalizing rolling of the 35x20 mm flat bars. The analysis was carried out by means of computer software Forge 2007® that is based on finite element method. Two cases of accelerated cooling during rolling process were considered. Numerical results of 35x20 mm flat bars rolling process allowed to determine the average recrystallized austenite diameter as well as basis energy and force parameters. Proposed modification of the 35x20 mm flat bar rolling technology with accelerated cooling results in the reduction of average austenite diameter, which could improve the strength of the final product.

scholarly journals Cooling Control Technology of Steel Plate in On-line Accelerated Cooling Process

2014 ◽  
Vol 50 (6) ◽  
pp. 487-496 ◽  
Author(s):  
Shigemasa NAKAGAWA ◽  
Hisayoshi TACHIBANA ◽  
Yasunori KADOYA ◽  
Yoichi HARAGUCHI ◽  
Kazuaki KOBAYASHI ◽  
...  
Keyword(s):  
Steel Plate ◽  
Accelerated Cooling ◽  
Control Technology ◽  
Cooling Process ◽  
Cooling Control ◽  
On Line

Microstructure Numerical Modelling Change during the Round Bars Rolling

2012 ◽  
Vol 715-716 ◽  
pp. 883-888 ◽  
Author(s):  
Sebastian Mróz ◽  
Piotr Szota ◽  
Andrzej Stefanik ◽  
Henryk Dyja
Keyword(s):  
Theoretical Analysis ◽  
Numerical Modelling ◽  
Impact Resistance ◽  
Strain Range ◽  
Rolling Process ◽  
Accelerated Cooling ◽  
The Finite Element Method ◽  
Microstructure Change ◽  
Stress Dependent

In this work result of the theoretical analyses, witch the main purpose was modelling of the microstructure change during round bars rolling was presented. To determination of the austenite diameter during numerical modelling of the rolling process it is necessary to assign mathematical models of the microstructure change, relationship making the value of yield stress dependent on deformation parameters, temperature and strain range. Theoretical analysis was made in computer program Forge2008®, based on the finite-element method. An analysis was made for two cases: traditional - without accelerated cooling during rolling process and normalizing with one section of the accelerated cooling during rolling process for the ø26 mm round bars. Modification of the ø26 mm round bars rolling technology with accelerated cooling, affect the reduction of average austenite diameter, which cause improving impact resistance of the final product. Results of the theoretical analysis were verified in industrial conditions, in one of polish steelwork.

Development and Production of Ultra-High Strength Linepipes With Dual-Phase Microstructure for High Strain Application

2007 ◽  
Author(s):  
Nobuyuki Ishikawa ◽  
Mitsuru Okatsu ◽  
Junji Shimamura ◽  
Shigeru Endo ◽  
Nobuo Shikanai ◽  
...  
Keyword(s):  
Base Material ◽  
High Strength ◽  
Controlled Rolling ◽  
Accelerated Cooling ◽  
Heating Process ◽  
Dual Phase ◽  
Low Carbon ◽  
Cooling Process ◽  
Bainite Microstructure ◽  
Microstructural Control

Extensive studies to develop high strength linepipes with higher deformability have been conducted. One of the key technologies for improving deformability is dual-phase microstructural control. Steel plate with ferrite-bainite microstructure can be obtained by applying Thermo-mechanical controlled processing, TMCP, made up with controlled rolling and accelerated cooling process. Low carbon-boron free steels were used to enable the ferrite formation during cooling after controlled rolling, and the accelerated cooling process with ultimate cooling rate enabled to achieve high strength of up to X120 grade. On-line heating process by induction device was also applied subsequently after accelerated cooling in order to improve Charpy energy of the base material and homogeneity of material properties in the plate. Trial production of X120 high deformability linepipe was also conducted by applying dual-phase microstructural control. Microstructural and mechanical properties of X120 linepipe are introduced in this paper.

Mechanical Properties and Precipitation Behavior of Ti-Mo Microalloyed Medium-Carbon Steel during Ultrafast Cooling Process

2014 ◽  
Vol 922 ◽  
pp. 86-93
Author(s):  
Xiang Tao Deng ◽  
Zhao Dong Wang ◽  
R.D.K. Misra ◽  
Jie Han ◽  
Guo Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Precipitation Hardening ◽  
Medium Carbon Steel ◽  
Precipitate Size ◽  
Accelerated Cooling ◽  
Air Cooling ◽  
Cooling Process ◽  
Medium Carbon ◽  
Ultrafast Cooling

We describe here the mechanical property evolution and precipitation hardening behavior under different cooling conditions including ultrafast cooling (UFC) + air cooling process and accelerated cooling (ACC) + air cooling process in a Ti-Mo microalloyed medium carbon steel is described here. The results demonstrate that the cooling procedure after hot rolling has a significant influence on the mechanical properties of the microalloyed steel. The yield strength and tensile strength that were obtained by ultrafast cooling (UFC) + air cooling process were higher than those from accelerated cooling (ACC) + air cooling process, while the elongation was slightly reduced. Microstructural characterization indicated that grain refinement and precipitation hardening were the primary reasons for the increase in strength of the experimental steel. Ultrafast cooling increased the density of dislocations and refined the grain size. Average size of precipitates containing Ti and Mo was 3~6 nm in ultrafast cooling (UFC) + air cooling process, while average precipitate size obtained by accelerated cooling (ACC) + air cooling process was 6~9 nm. Keywords: Ti-Mo medium-carbon steel; Precipitation; Ultra fast cooling process; accelerated cooling process

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