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Year 2008 No 1

Besterci M., Velgosová O., Ivan J., Kvačkaj T.
THE MECHANICAL PROPERTIES AND FRACTURE MECHANISM OF Al-Al4C3 SYSTEM INVESTIGATED BY “IN-SITU TENSILE TEST IN SEM” METHOD
Keywords: composite material|“in-situ tensile testing in SEM”|fracture mechanisms|
No 1 (2008), p. 7-16
  mag01.pdf (2 MB)
mag01_eng.txt (2 kB)  

Fáberová M., Jakubéczyová D., Selecká M.
TECHNOLOGICAL AND MICROSTRUCTURAL PROPERTIES OF RAPID-SOLIDIFIED PM HSS STEEL ADDITIONALLY ALLOYED WITH COBALT
Keywords: rapid solidification|high speed steels|cooling rate|particle size|
No 1 (2008), p. 17-23
  mag02.pdf (780 kB)
mag02_eng.txt (1 kB)  

Vadász P., Tomášek K.
INDIRECT METHODS OF STRUCTURAL STUDY OF OXIDES MELTS
Keywords: melt|structure|density|surface tension|fayalite|cluster|
No 1 (2008), p. 24-33
  mag03.pdf (507 kB)
mag03_eng.txt (2 kB)  

Lašček M.
SPECIFIC HEAT CAPACITY OF 1Cr18Ni9 AUSTENITIC CHROMIUMNICKEL STEEL
Keywords: Molar heat capacity|specific heat capacity|heating and cooling curve (rate)|non-stabilised 1Cr18Ni9 austenitic chromium-nickel steel|alfa and beta|
No 1 (2008), p. 34-49
  mag04.pdf (456 kB)
mag04_eng.txt (2 kB)  

Mišičko R.
EMBRITTLEMENT OF CONTINUOUSLY CAST STEEL PRODUCTS AND ITS MICROSTRUCTURAL EFFECTS
Keywords: Embrittlement|cracks|grain boundaries|austenite|ferrite|carburization|decarbonization|
No 1 (2008), p. 50-58
  mag20.pdf (432 kB)
mag20_eng.txt (2 kB)  

Jandová J., Havlák L., Kondás J.
RECYCLING OF LITHIUM-CONTAINING WASTEWATER
Keywords: recycling|lithium carbonate|precipitation|alkaline wastewater|
No 1 (2008), p. 59-65
  mag06.pdf (148 kB)
mag06_eng.txt (2 kB)  

Lašček M.
SPECIFIC HEAT CAPACITY MODEL OF BÖHLER S600 HIGH SPEED STEEL
Abstract
In the article is presented the methodology of analytical calculation of molar and specific heat capacity of BÖHLER S600 high-speed steel.
The chemical content (in weight percentages) of the steel, heating or cooling curves is generally the input of the calculation. Heating and cooling curves can be acquired applying by probes of the Wolfson test type, whereas the probes are made of BÖHLER S600 (B.S600).
Mathematical equations described in the article are the active part of the model. The thermal dependence of B.S600 molar heat capacity and the thermal dependence of B.S600 specific heat capacity are main results.
The heat capacity model presented in the article takes 8 chemical components of BÖHLER S600 steel into account (C, Si, Mn, Cr, Mo, V, W, Fe) and heating curves of the probes are applied into the heat capacity model.
Heating process of the probes in the LM 112.10 electrical resistance furnace up to 1126 °C was repeated and recorded six times and the average value was taken into account.
Steel allotropic changes are remembered in the heat capacity model, no external stress and strain states as a load were applied. The rule of Neumann and Kopp was applied as a basic rule necessary for creating of the heat capacity model. Computing procedures were realised by program software Microsoft Excel.
The calculation methodology and the heat capacity model as a function of temperature described in the article can be helpfully applied to calculate a heat capacity for a chosen high speed steel, tool steel or steel in a dependency of the steel chemical content and as a function of the heating or cooling process.

Keywords: Molar heat capacity|specific heat capacity|heating curve (rate)|the steel|BÖHLER S600 high-speed steel|allotropic changes|
No 1 (2008), p. 66-83
  mag07.pdf (436 kB)
mag07_eng.txt (2 kB)  

Demeter P., Mihok Ľ., Byrtus R., Mlčoch P.
UTILISATION OF GRAVEL MADE FROM BLAST FURNACE SLAG FOR PRODUCTION OF CONCRETES
Keywords: Blast furnace slag|Gravel|Concrete|Road engineering|
No 1 (2008), p. 84-92
  mag08.pdf (2 MB)
mag08_eng.txt (2 kB)  

Václavík V.
EFFECTIVE UTILIZATION OF STEEL-MAKING SLAG IN BUILDING INDUSTRY
Keywords: steel slag|natural aggregate|concrete mixture|cube compression strength|prism compression strength|
No 1 (2008), p. 93-102
  mag09.pdf (608 kB)
mag09_eng.txt (2 kB)  

Velgosová O., Miškufová A., Laubertová M.
THE PREPARATION OF AL-BASED COMPOSITES
Keywords: composite Al-|Al2O3 particles|casting|powder metallurgy|Al dross|
No 1 (2008), p. 103-112
  mag10.pdf (492 kB)
mag10_eng.txt (2 kB)  

Kucková A.J., Sajková M., Fröhlichová M., Baran P., Bálintová J.
THE INFLUENCE OF TYPE COMPOSITION OF COAL CHARGE ON COKE QUALITY
Keywords: Type analysis|coal charge|charge quality|coke quality|
No 1 (2008), p. 113-118
  mag11.pdf (90 kB)
mag11_eng.txt (1 kB)  

Rozpondek M., Siudek M.
RENEWABLE ENERGY SOURCE – BIOMASS PELLETS
Keywords: pellets|testing pellets|combustion|pellet’s ash|
No 1 (2008), p. 119-124
  mag12.pdf (345 kB)
mag12_eng.txt (2 kB)  

Majchrzycka A., Kozak T.
THE USE OF BIOGAS IN THE RURAL AREAS
Keywords: biomass|biogas|cogeneration|power plant|heat balance|
No 1 (2008), p. 125-131
  mag13.pdf (94 kB)
mag13_eng.txt (2 kB)  

Manoljović R., Koneska Z., Stoevska-Gogovska D.
QUANTITATIVE PARAMETERS OF DEFORMATION OF COLD ROLLED METAL MATERIALS
Keywords: quantitative parameters of deformation|thickness reduction elongation|spreading|cold rolling|metal’s materials|
No 1 (2008), p. 132-141
  mag14.pdf (93 kB)
mag14_eng.txt (2 kB)  

Vinklerová Š.
APPLICATION OF UNIQUANT AND QUANTAS STANDARDLESS PROGRAMS IN THE X-RAY SPECTROMETRIC ANALYSES OF MATERIALS FROM THE METALLURGICAL PRODUCTION
Keywords: X-ray spectrometry|standardless technique|chemical composition|metallurgical materials|
No 1 (2008), p. 142-150
  mag15.pdf (112 kB)
mag15_eng.txt (2 kB)  

Gajdzik B.
COMPONENTS OF CORPORATE IDENTITY OF METALLURGICAL COMPANIES
Keywords: image of metallurgical company|corporate identity system|components of identity: logo|colours|advertising slogans|occasional prints|business cards|
No 1 (2008), p. 151-155
  mag16.pdf (58 kB)
mag16_eng.txt (524 B)  

Gajdzik B.
ENVIRONMENTAL MANAGEMENT AT METALLURGICAL COMPANY - BASIC ELEMENTS OF SYSTEM
Keywords: environmental protection|environmental management|development balanced strategy|ecological investments|ecological effects|
No 1 (2008), p. 156-161
  mag17.pdf (59 kB)
mag17_eng.txt (1 kB)  

Pernis R.
BEGINNING OF METAL FORMING AND UNIVERSITY STUDIES ON SLOVAKIA
Keywords:
No 1 (2008), p. 162-171
  mag18.pdf (406 kB)
mag18_eng.txt (1 kB)  

Brehuv J., Magula R.
KNOWN AND UNKNOWN MINING-PROCESSING ACTIVITIES OF ARISTOCRATIC FAMILY „DE SOÓSO“
Keywords:
No 1 (2008), p. 172-176
  mag19.pdf (831 kB)