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Original Scientific Paper
Preliminary Note
Review
Review Paper
Professional Paper
ARCHIVE 1996 - 2009
48
year issue
Metalurgija - Journal for Theory and Practice in Metellurgy
Metallurgy 48 (2) 69 - 140
PDF - 12466 kB
ISSN 1334-2576    UDC:669+621.7+51/54(05)=163.42=111     METABK: 48 (2) 69 - 140 (2009)
Authors
Original Scientific Paper
J. Michalik, C. Kolmasiak
Physical modeling of stresses during continuous casting of St3S steel
abstract, article page 71 - 74 PDF - 902 kB
G. Siwiec, J. Willner
The mechanism of liquid copper deoxidation during argon blowing
abstract, article page 75 - 77 PDF - 481 kB
D. Kozak, I. Samardžic,
P. Konjatic
Fracture mechanics parameters estimation of CCT specimens made of X 5 CrNi 18 10 steel
abstract, article page 79 - 82 PDF - 787 kB
T. Fraczek, M. Olejnik, A. Tokarz
Evaluation of plasma nitriding efficiency of titanium alloys for medical applications
abstract, article page 83 - 86 PDF - 1147 kB
B. Oleksiak
Possibilities of removing lead from industrial Cu-Pb-Fe alloy with of argon barbortage
abstract, article page 87 - 90 PDF - 537 kB
Home
Preliminary Note
W. Derda, K. Mierzwa
The thermal treatment of electric arc furnace dust under low gas phase pressure
abstract, article page 91 - 94 PDF - 506 kB
T. Lis
Modification of oxygen and sulphur inclusions in steel by calcium treatment
abstract, article page 95 - 98 PDF - 874 kB
V. Stoyka, F. Kovac,
B. Julius
Study of secondary recrystallization in grain-oriented steel treated under dynamical heat treatment conditions
abstract, article page 99 - 102 PDF - 1048 kB
L. Gusel, R. Rudolf,
B. Kosec
Analysis of a strain rate field in cold formed material using the visioplasticity method
abstract, article page 103 - 107 PDF - 734 kB
U. Esme, A. Kokangul,
M. Bayramoglu, N. Geren
Mathematical modeling for prediction and optimization of TIG welding pool geometry
abstract, article page 109 - 112 PDF - 477 kB
K. Nowacki
Possibility of determining steel grain size using ultrasonic waves
abstract, article page 113 - 115 PDF - 496 kB
A. Sagbas, F. Kahraman,
U. Esme
Modeling and predicting abrasive wear behaviour of poly oxy methylenes using response surface
methodolgy and neural networks
abstract, article page 117 - 120 PDF - 656 kB
M. Górska, L. Szecówka,
R. Budzik
The influence of changes of combustion gas temperature during flow around the horizontal cylinder
on local Nu number
abstract, article page 121 - 124 PDF - 915 kB
Top of Page
Review Paper
Z. Skuza, C. Kolmasiak,
R. Prusak
Possibilities for the utilization of metallurgical slag in the conditions of the Polish economy
abstract, article page 125 - 128 PDF - 466 kB
T. Sasvári, J. Durove,
B. Pandula
Rock massif observation from underground coal gasification point of view
abstract, article page 129 - 132 PDF - 144 kB
A. Fornalczyk, M. Saternus
Removal of platinum group metals from the used auto catalytic converter
abstract, article page 133 - 136 PDF - 198 kB
B. Gajdzik
Introduction of total productive maintenance in steelworks plants
abstract, article page 137 - 140 PDF - 463 kB
Top of Page
Original Scientific Paper

J. Michalik, C. Kolmasiak - Physical modeling of stresses during continuous casting of St3S steel

     In this work the results of physical and numerical modeling of stresses in metal during continuous casting were shown. The numerical research for St3S ingot were realized. Computer program based on Finite Element Method (FEM) was used to simulation. Investigated conditions were based on actual data received from one of polish steel plant. The simulation of continuous casting process was made on GLEEBLE 3800 simulator. The results of thermal load and also stages of bending and straightening of the bloom and stress relaxation phenomenon were shown. Mechanical properties of a solid metal are described by the theory of dislocation that allows taking into account history of changes of stress and strain in the material.
 PDF - 902 kB

G. Siwiec, J. Willner - The mechanism of liquid copper deoxidation during argon blowing

     Using the method of argon (with specified oxygen content) blowing, the possibility of copper deoxidation has been considered on the basis of specific thermodynamic data. Despite the oxygen exceeding its equilibrium content in argon, a significant copper deoxidation during blowing has been experimentally observed. The explanation of this phenomenon can be the reaction of oxygen with the crucible material. In the present study, graphite and Al2O3 crucibles were used. The stirring effect of gaseous bubbles promotes passing the substrates to and removing the products from the reaction zone.
 PDF - 481 kB

D. Kozak, I. Samardžic, P. Konjatic - Fracture mechanics parameters estimation of CCT specimens made of X 5 CrNi 18 10 steel

      This study investigates fracture behaviour of specimens made of high ductile stainless steel. Investigated material was X 5 CrNi 18 10 steel and the specimens used in this investigation were prepared as centre crack tension (CCT) specimens. Pre-cracking of specimens was done by controlled cycling loading. For determination of J-integral, as one of important fracture mechanics parameters, a single specimen method with loading-unloading procedure was used. The same experiment was numerically modelled by using commercial software for finite element analysis - ANSYS. The standard node releasing technique was implemented in finite element method simulation to simulate crack propagation. Numerically obtained results were compared to the results obtained by experiment.
 PDF - 787 kB

T. Fraczek, M. Olejnik, A. Tokarz - Evaluation of plasma nitriding efficiency of titanium alloys for medical applications

     The surface layers obtained on selected titanium alloys, used in medicine, by the nitriding under glow discharge condition were investigated. The results concern of: α- titanium alloy Grade 2 and α + β alloys Grade 5 and Grade 5 ELI nitrided in temperature below 873 K. The nitriding experiments were performed in a current glow-discharge furnace JON-600 with assisting of unconventional methods. After nitriding surface layers were characterised by surface microhardness measurements, chemical depth profiles, microhardness depth profiles and wear resistance tests.
 PDF - 1147 kB

B. Oleksiak - Possibilities of removing lead from industrial Cu-Pb-Fe alloy with of argon barbortage

     In this article results of research on removal of the lead from industrial Cu-Pb-Fe alloy by means of argon barbotage are presented. The examinations was performed on an industrial alloy from the "Glogow II" Copperworks. As a basic research equipment a pipe resistance furnace enabling heating of a sample up to 1773 K temperature was used. All researches were conducted at 1473 K, 1523 K, 1573 K temperature and with gas flow 5,55×10-6, 6,94×10-6, 8,33×10-6, 9,72×10-6 m3/s.
 PDF - 537 kB

Home
Preliminary Note

W. Derda, K. Mierzwa - The thermal treatment of electric arc furnace dust under low gas phase pressure

     The paper presents the results of laboratory tests on the process of thermal reduction of electric arc furnace dust (EAFD) in the temperature range from 1273 to 1473 K. Before proceeding to the experimental tests, a thermodynamic analysis was made using the computer program FactSage® with the aim of determining the optimal conditions for the dust components reduction reaction to proceed. The results of tests carried out, respectively, under atmospheric pressure conditions and under reduced pressure conditions are presented, where carbon in the form of graphite and blast-furnace dust (containing approx. 40 % of carbon) was used as the reducer. The test results represent the effect of reduced pressure on the potential for intensifying the process of zinc removal from the dust. The degree of zinc extraction was considerably higher compared to the results of tests carried out under atmospheric pressure conditions.
PDF - 506 kB

T. Lis - Modification of oxygen and sulphur inclusions in steel by calcium treatment

     In the article, the results of examinations of changes in deformability of oxygen and sulphur inclusions in structural steel processed with calcium are discussed. The results obtained imply the positive influence of the calcium additives on the changes in geometry of oxygen and sulphur inclusions related to the modification of their chemical composition.
PDF - 874 kB

V. Stoyka, F. Kovac, B. Julius - Study of secondary recrystallization in grain-oriented steel treated under dynamical heat treatment conditions

     The present study was made to investigate secondary recrystallization in grain-oriented steels annealed at short time temperature exposures with application of dynamical heating. The investigated GO steels for experiments were taken from one industrial line after final cold rolling reduction and subsequent box annealing. It was shown that application of short time heat treatment conditions could lead to complete abnormal grain growth in the investigated GO steel. The texture and microstructure obtained in the laboratory treated material is similar to that observed in the same GO steel taken after industrial final box-annealing. However, some "parasitic" grains were observed in the secondary recrystallized matrix of the laboratory treated GO steel. These "parasitic" grains possess the unwanted from magnetic properties point of view {111} orientation components.
PDF - 1048 kB

L. Gusel, R. Rudolf, B. Kosec - Analysis of a strain rate field in cold formed material using the visioplasticity method

     In this paper the visioplasticity method is used to find the complete velocity and strain rate distributions from the experimental data, using the finite-difference method. The data about values of strain rates in plastic region of the material is very important for calculating stresses and the prediction of product quality. Specimens of copper alloy were extruded with different lubricants and different coefficients of friction and then the strain rate distributions were analysed and compared. Significant differences in velocity and strain rate distributions were obtained in some regions at the exit of the deformed zone.
PDF - 734 kB

U. Esme, A. Kokangul, M. Bayramoglu, N. Geren - Mathematical modeling for prediction and optimization of TIG welding pool geometry

     In this work, nonlinear and multi-objective mathematical models were developed to determine the process parameters corresponding to optimum weld pool geometry. The objectives of the developed mathematical models are to maximize tensile load (TL), penetration (P), area of penetration (AP) and/or minimize heat affected zone (HAZ), upper width (UW) and upper height (UH) depending upon the requirements.
PDF - 477 kB

K. Nowacki - Possibility of determining steel grain size using ultrasonic waves

     Properties of steel depend also on its internal structure. In practice, one can distinguish between primary structure (obtained during solidification) and secondary structure (being a result of the γ phase transition into the α phase during hot working or heat treatment). The grain refinement degree obtained is assessed with microscopic examination. In this work an alternative method is proposed in the determination of the steel microstructure refinement degree. The method is based on the dependence between the high frequency sound attenuation coefficient and the average grain diameter. Sound in steel increases when the average steel grain diameter approximates the ultrasonic wave length, because of the scattering of waves on grain boundaries.
PDF - 496 kB

A. Sagbas, F. Kahraman, U. Esme - Modeling and predicting abrasive wear behaviour of poly oxy methylenes using response surface methodolgy and neural networks

     In this study, abrasive wear behaviour of poly oxy methylenes (POM) under various testing conditions was investigated. A central composite design (CCD) was used to describe response and to estimate the parameters in the model. Response surface methodology (RSM) was adopted to obtain an empirical model of wear loss as a function of applied load and sliding distance. Also, a neural network (NN) model was developed for the prediction and testing of the results. Finally, a comparison was made between the results obtained from RSM and NN.
PDF - 656 kB

M. Górska, L. Szecówka, R. Budzik - The influence of changes of combustion gas temperature during flow around the horizontal cylinder on local Nu number

     The article the influence of changes of combustion gas temperature during flow around of horizontal cylinder on local Nu number was presented. In order to test an influence of effect waste gas temperature cycle of experimental investigations were conducted. Experimental tests were carried out on a properly designed measuring cylinder furnished with a number of thermocouples embedded along the cylinder perimeter. The cylinder was made from stainless steel of known thermal conductivity, and was cooled on the outer side through a water cooling system. The cylinder was placed horizontally in a heating chamber equipped with an axially positioned gas burner fired with natural gas. Gas and air feeds were regulated with control valves, based on combustion gas analyzer data.
PDF - 915 kB

Top of Page
Review Paper

Z. Skuza, C. Kolmasiak, R. Prusak - Possibilities for the utilization of metallurgical slag in the conditions of the Polish economy

     The article presents the current possibilities for the utilization of blast-furnace and steelmaking slag in the realities of the Polish economy. Particular consideration is given to the legislation applicable to this area and to the physical and chemical requirements imposed on this material. Some aspects of environmental protection are described, and selected indicators are given, which must be met by this material to be used in various fields, such as road construction or cement production. Economical factors that are crucial to perceiving the slag as a standard valuable metallurgical product is also taken into consideration in the analysis.
PDF - 466 kB

T. Sasvári, J. Durove, B. Pandula - Rock massif observation from underground coal gasification point of view

     The Underground coal gasification (UCG) of the coal seams is determined by suitable geological structure of the area. The assumption of the qualitative changes of the rock massif can be also enabled by application of geophysical methods (electric resisting methods and geoelectric tomography). This article shows the example of evaluating possibilities of realization of the underground coal gasification in the area of the Upper Nitra Coal Basin in Cíge¾ and Nováky deposits, and recommend the needs of cooperation among geological, geotechnical and geophysical researchers.
PDF - 144 kB

A. Fornalczyk, M. Saternus - Removal of platinum group metals from the used auto catalytic converter

     Recycling of platinum group metals from the used auto catalytic converters is profitable from ecological and also economical point of view. This work presents the analysis of the chances of removing the platinum group metals (PGM) from the used auto catalytic converters applying pyrometallurgical and hydrometallurgical methods. The characteristics of auto catalytic converter is shown as well the available technologies used for processing the auto catalytic converters are also presented.
PDF - 198 kB

B. Gajdzik - Introduction of total productive maintenance in steelworks plants

     The paper presents the concept of TPM - Total Productive Maintenance and its basic method 5S (sort, systematize, sweep, sanitize, self-discipline). The new management concept is realized in Japanese and USA companies. On the Polish market the methods was adopted in the first years of 21st century by car manufacturers and household equipment producers. Nowadays the concept is tested by steelworks in Polish steel industry. The process of introduction of these methods is long, difficult and requires organizational and technical changes. The companies which realize Awareness Management Project of workers in Health and Safety System use other methods whose primary goal is to ensure objectivity and comparability of results and skill assessment of particular employees (the Current and Periodic Assessment System for worker and supervision positions).
PDF - 463 kB

April / June
2 0 0 9
Top of Page
Original Scientific Paper
Preliminary Note
Review
Review Paper
Professional Paper
ARCHIVE 1996 - 2009