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Year 2000 No 4

Vallová S., Slovák V., Leško J.
THERMAL OXIDATION OF FINE GRAINED CARBONACEOUS MATERIALS IN THE PRESENCE OF ZN(II), FE(III) AND PB(II) COMPOUNDS
Keywords: thermal oxidation|coke|graphite|TG|kinetics|
No 4 (2000), p. 304-309
  mag01.pdf (93 kB)
mag01_eng.txt (983 B)  

Kulveitová H., Seidlerová J., Leško J.
RELATION BETWEEN THE ZN(II) CHEMICAL SPECIATION AND ITS ACID LEACHING FROM FINE GRAINED METALLURGICA
Keywords: metallurgical wastes|chemical speciation|acid leaching|
No 4 (2000), p. 310-317
  mag02.pdf (102 kB)
mag02_eng.txt (1 kB)  

Pavliska J., Jonšta Z., Mazancová E., Mazanec K.
MICROSTRUCTURE AND METALLURGY INVESTIGATION OF THE HOT DUCTILITY BEHAVIOUR OF STEELS
Keywords: residual element|transverse cracks|localised deformation|hot ductility|intergranular ferrite|acicular ferrite|
No 4 (2000), p. 318-326
  mag03.pdf (161 kB)
mag03_eng.txt (965 B)  

Sojka J., Hyspecká L.
ROLE OF THE MICROSTRUCTURE IN HYDROGEN INDUCED CRACKING OF CARBON - MANGANESE STEELS
Keywords: carbon manganese steel|heat treatments|microstructure|pearlitic bands|hydrogen induced cracking|
No 4 (2000), p. 327-335
  mag04.pdf (209 kB)
mag04_eng.txt (855 B)  

Schindler I., Bílovský P., Kubina T., Dänemark J., Radina M., Silbernagel A., Šarovský J., Kučera K.
CONTROLLED ROLLING OF A ST52-3 STEEL AT THE LABORATORY MILL TANDEM
Keywords: flat rolling simulation|laboratory rolling mill|plain-carbon steel|microstructure|mechanical properties|technology optimization|
No 4 (2000), p. 336-344
  mag05.pdf (214 kB)
mag05_eng.txt (646 B)  

Dobrovský Ľ., Kopečný M., Kostiuková G., Dobrovská J.
UTILIZATION OF THE SECONDARY SUBSTANCES IN THE TECHNOLOGICAL ROUTES OF PRETREATMENT OF PIG IRON
Keywords: preliminary treatment of pig iron|desulphurization|dephosphorization|slags|
No 4 (2000), p. 345-352
  mag06.pdf (189 kB)
mag06_eng.txt (641 B)  

Macoszek M., Brožová S., Kafka V., Bůžek Z.
POSSIBLE WAYS OF PLASMA HEATING FOR PROCESSING THE METAL-BEARING OXIDIC WASTES
ABSTRACT
On the basis of a complex examination of trial results this work provided evidence on metallurgical readiness and economical efficiency in implementation of plasma heating at processing of the metal-bearing oxidic wastes under conditions prevailing in the VÍTKOVICE, a. s. Steelworks.
Ironmaking and steelmaking is always associated with origination of waste that presents for the entire metallurgical process either reversible and/or reusable material or lost waste not applicable in further production. At present the waste from iron- and steelmaking finds hardly applicability as secondary raw material.
Evidence has been given that the low-temperature plasma could replace the existing routes of less-suitable pyrometallurgical treatment of such wastes that are therefore processed by hydrometallurgical route.
As the metallurgical and technological features of this application are obvious then more light should be thrown into the economy. The economical insight into efficiency of the assumed processing of the metal-bearing waste is dealt in detail with by example of a concrete situation at VÍTKOVICE, a.s. - Division 200.
The economical efficiency of that route can be in principle determined by comparison of the calculated costs with the price of ready product.
In case of liquid metal with a guaranteed chemical composition the profit would reach 900 Kč/t and the profitability (profit referred to the costs) would be 20%. In case of melting steelmaking hot metal the profit of 900 Kč/t is reached, which refers to a profitability of 17 to 20%. With the foundry hot metal and with Sorel the possible profit varies from 2100 to 4100 Kč/t and the profitability makes 35 up to 51%.

Keywords: metal-bearing oxidic wastes|plasma heating|economical efficiency|calculated and processing costs|profit and profitability|
No 4 (2000), p. 353-362
  mag07.pdf (210 kB)
mag07_eng.txt (2 kB)  

Tomčík P., Hrubý J.
THE ACTION OF AC MAGNETIC FIELD ON COLD FORMING PROCESS AND COMPARISON OF FLOW STRESS CURVES
Keywords: magnetic domains|magnetostriction|electromagnetic volume power|change of the magnetic flux density in time|
No 4 (2000), p. 363-368
  mag08.pdf (199 kB)
mag08_eng.txt (466 B)  

Bajger Z., Michalec J., Kret J., Bajgerová D.
CONTRIBUTION TO METALLURGICAL TECHNOLOGY CONTROL PROBLEMS
Keywords: proceedings of metallurgical technologies|emissions|analysis of gases|kinetic equations|
No 4 (2000), p. 369-374
  mag09.pdf (157 kB)
mag09_eng.txt (721 B)  

Mohyla M., Kristofory F., Vítek J.
ELECTROFORMING - A PART OF ENGINEERING PLATING PROCESSES (TREATISE ON USE OF NICKEL ALLOYS)
Keywords: galvanic precipitation|electroforming|NiFe|NiCo alloys|metal models|
No 4 (2000), p. 375-379
  mag10.pdf (183 kB)
mag10_eng.txt (566 B)  

Podjuklová J., Mohyla M.
CONTRIBUTION TO THE STUDY OF THE PHASE BOUNDARY BETWEEN THE VITREOUS AND METALLIC PHASE
Keywords: phase boundary|metal|vitreous enamel|intermediate layer|cluster complex|
No 4 (2000), p. 380-387
  mag11.pdf (162 kB)
mag11_eng.txt (558 B)  

Vodárek V., Strang A.
MICROSTRUCTURAL CHANGES IN 12CrMoVNb STEELS DURING CREEP AT 550 C
Keywords: strengtht and toughness|creep properties|life degradation|substructural changes during ageing|
No 4 (2000), p. 388-395
mag12_eng.txt (1 kB)  

Mohyla P., Koukal J.
CHANGES OF MECHANICAL PROPERTIES IN 0,5CR-0,5MO-0,3V STEEL WELDS AFTER LONG TERM EXPOSITION AT HIGH TEMPERATURES
Keywords: low-alloyed steel|CrMoV steel welds|the creep range|the sub-creep range|secondary hardening|coagulation|coarsening|additional precipitation|
No 4 (2000), p. 396-404
  mag13.pdf (207 kB)
mag13_eng.txt (810 B)