Numerical modelling of BSCCO powder deformation in the Bi-2223/Ag tape rolling process

2005 ◽  
Vol 18 (6) ◽  
pp. 818-823 ◽  
Author(s):  
Li-Ping Lei ◽  
Ying-Hong Zhao ◽  
Pan Zeng ◽  
Han-Ping Yi
Keyword(s):  
Numerical Modelling ◽  
Rolling Process ◽  
Powder Deformation

Influence of the Deformation Method on the Microstructure Changes in AZ31 Magnesium Alloy Round Rods Obtained by the Rolling Process

2016 ◽  
Vol 716 ◽  
pp. 864-870
Author(s):  
Andrzej Stefanik ◽  
Piotr Szota ◽  
Sebastian Mróz ◽  
Teresa Bajor ◽  
Sonia Boczkal
Keyword(s):  
Magnesium Alloy ◽  
Numerical Modelling ◽  
Rolling Mill ◽  
Laboratory Tests ◽  
Effective Strain ◽  
Rolling Process ◽  
Az31 Magnesium Alloy ◽  
Deformation Method ◽  
Microstructure Changes ◽  
Skew Rolling

This paper presents the research results of the microstructure changes of the round rods of AZ31 magnesium alloy in the hot rolling processes. The rolling was conducted in duo mill and a three-high skew rolling mill. Numerical modelling of the AZ31 magnesium alloy round rods rolling process was conducted using a computer program Forge 2011®. The verification of the results of numerical modelling was carried out during laboratory tests in a two-high rolling mill D150 and a three-high skew rolling mill RSP 40/14. Distributions of the total effective strain and temperature during AZ31 rods rolling process were determined on the basis of the theoretical analysis. Microstructure and texture changes during both analysed processes were studied.

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.

Numerical Modelling of Ploughshares Rolling Process from Scrapped Railway Rail

2013 ◽  
Vol 199 ◽  
pp. 472-477
Author(s):  
Piotr Szota ◽  
Sebastian Mróz ◽  
Andrzej Stefanik ◽  
Henryk Dyja
Keyword(s):  
Numerical Modelling ◽  
Rolling Process ◽  
Roll Pass Design ◽  
Rolling Schedule ◽  
Pass Design ◽  
Roll Pass ◽  
Varying Thickness ◽  
Railway Rail ◽  
Open Shape ◽  
Unusual Shape

In this work, a rolling schedule has been developed, which allows the scrapped S60 railway rail to be used for further processing into semi-finished or finished products. The main purpose of the investigations was to develop the shape and dimensions the rolling grooves and to select the strains in various passes in the ploughshare rolling process. The main problem during roll pass design was the ploughshare shape which is asymmetric and has a varying thickness along the width. The developed roll pass design consist of five passes: one open shape pass, one edging pass and three closed shape passes. The first open shape pass is characterized by an unusual shape which tends to reduce the band asymmetricality in the horizontal axis in such a manner as to prevent the formation of lapping in the sharp corner areas resulting from cutting. Based on the numerical modelling it has been found that the developed roll pass design allows the production of a ploughshare of dimensions conforming to the dimensional assumptions. For the numerical modelling of the rolling process, the Forge2008® computer program was employed.

scholarly journals Increasing the Durability of Separating Rolls During Rolling Ribbed Bars in the Three-Strand Technology

2017 ◽  
Vol 62 (3) ◽  
pp. 1535-1540 ◽  
Author(s):  
D. Strycharska ◽  
P. Szota ◽  
S. Mróz
Keyword(s):  
Numerical Modelling ◽  
Experimental Tests ◽  
Rolling Process ◽  
Production Volume ◽  
Roll Pass Design ◽  
Pass Design ◽  
Roll Pass ◽  
Band Shape ◽  
Groove Surface ◽  
Pass System

Abstract The paper presents the results of investigations aimed at enhancing the durability of slitting passes in the process of three-strand rolling of 16 mm-diameter ribbed bars. Using the Forge2011® computer program, numerical modelling of the rolling process was carried out in order to examine the variations in band shape in individual rolling passes, to verify the correctness of the designed new slitting pass system, to determine the local strains in the rolled band, and then to determine the distribution of unit friction force work on the roll groove surface. From the obtained investigation results it was found that the application of the new roll pass design in stands 13-16 increased their durability in the rolling process by approx. 30%. The wear of the roll sets for the stands under examination after rolling out the annual 16 mm-diameter bar production volume was determined in the study. The obtained numerical modelling results were verified in experimental tests.

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.

Sign in / Sign up

Export Citation Format

Share Document