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Archives of Foundry Engineering
EN The paper contains CCT diagrams presenting a transformation kinetics of under-cooled austenite from two new bainitic cast steels which the scissors crossovers for heavy-duty railway tracks (min. 230kN/axle) at the speed up to 200 km/h are made of. The cooling ranges of UIC60 type railway tracks plot[...]
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Archives of Foundry Engineering
EN This article investigates possible use of waste gypsum (synthetic), recovered via flue-gas desulfurization from coal-fired electric power plants, in foundries. Energy sector, which in Eastern Europe is mostly composed from coal-fired electric power plants, is one of the largest producers of sulfur d[...]
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Archives of Foundry Engineering
PL W pracy przedstawiono nową metodę badań przepuszczalności form ceramicznych stosowanych w technologii wytapianych modeli. Zaprezentowano koncepcje prowadzenia pomiarów przepuszczalności form ceramicznych. Wykonano badania, w których określono wpływ udziału fazy stałej w ciekłej masie ceramicznej (CM[...]
EN The new investigation method of a permeability of ceramic moulds applied in the investment casting technology, is presented in the paper. Some concepts of performing permeability measurements are shown. Investigations in which the influence of the solid phase fraction in the liquid ceramic moulding [...]
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Archives of Foundry Engineering
EN This paper presents a new perspective on the issue of reclamation of moulding and core sands. Taking as a premise that the reclamation process must remain on the surface of grains some not separated binding materials rests, it should be chosen the proper moulding sand's composition that will be leas[...]
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Archives of Foundry Engineering
EN Creep-resistant parts of heat treatment furnaces are in most cases made from high-alloyed chromium-nickel and nickel-chromium iron alloys, both cast and wrought. This paper presents the types of casting alloys used for this particular purpose, since the majority of furnace components are made by the[...]
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Archives of Foundry Engineering
EN In this paper results of microsegregation in the newly developed nodular cast iron with carbides are presented. To investigate the pearlitic and bainitic cast iron with carbides obtained by Inmold method were chosen. The distribution of linear elements on the eutectic cell radius was examined. To in[...]
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Archives of Foundry Engineering
EN Results of research on ability of a plaster mould cavity to be filled up on casting with alloy CuSn10 and CuSn5Zn5Pb5 are presented in this paper. The cylindrical plaster mould ø110x290 was casting using underpressure in the Vacuum Pressure Casting Machine VC500D of Indutherm. The size of mould cavi[...]
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Archives of Foundry Engineering
EN Castings were poured from PA9 aluminum alloy. Cores in the form of standard cylindrical specimens were made from the core mixture based on fly ash of the identified chemical and granular composition. The binder for the fly ash-based core mixture was chemically modified, hydrated sodium silicate. Fro[...]
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Archives of Foundry Engineering
EN This paper deals with polysialates water-glasses preparation. There were used various procedures with the goal to create inorganic polymer on silicon and aluminum base. The one composed of SiO2 and AlO4 tetrahedron chains. For the preparation was concentrated NaOH solution used together with metakao[...]
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Archives of Foundry Engineering
EN The theoretical part of the study discloses the genesis of the research which originated from a possibility of replacing the so far used expensive machine parts with parts cheaper and yet offering similar quality and performance life. A short characteristic of the machine was given where the main op[...]
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Archives of Foundry Engineering
EN In this paper the analysis of thin walled castings made of ductile iron is considered. It is shown that thin wall austempered ductile iron can be obtained by means of short-term heat treatment of thin wall castings without addition of alloying elements. Metallographic examinations of 2 mm thin walle[...]
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Archives of Foundry Engineering
EN A computer program allowing calculation of dimensional changes of mould made of silica-gypsum composition in process of its heat treatment and preparation for molten metal casting is presented in this paper. The composition of the mixture and casting temperature to obtain cast of predetermined dimen[...]
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Archives of Foundry Engineering
EN In foundries of metallurgical character it is difficult to ensure an acceptable climatic working environment during winter season. It is connected with explosing the raw materials (binders, hardeners) and mixtures to extreme temperatures. The contribution deals with kinetics of harding the furan-chr[...]
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Archives of Foundry Engineering
EN In this article are presented the results of study on the kinetics of the crystallization processes in the refined, modified and filtered Silumin containing copper and the metallographic analysis of the obtained structures. Impact of the upgrading processes - refining, modification and filtration - [...]
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Archives of Foundry Engineering
EN Plaster moulds used in precision foundry are characterized by a very low permeability which, in the case of classic plaster moulds, equals to about 0,01- 0,02 m2/(MPaxEs). One of the most effective methods for increasing the permeability is a foaming treatment. Another characteristic feature of plas[...]
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Archives of Foundry Engineering
EN The paper presents a statistical assessment of the effect of chemical composition on mechanical properties of hypereutectic AlSi17 silumin, which is expected to act as a counterpart of alloys used by automotive industry and aviation for casting of high-duty engine parts in West European countries an[...]
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Archives of Foundry Engineering
EN Foamed plaster moulds are used in precision casting process of non-ferrous alloys. Casting from those moulds are characterizedby high dimensional accuracy, very good shape pattering and small surface roughness. However, a drawback of the plaster mould is very low permeability. A substational improve[...]
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Archives of Foundry Engineering
EN Despite the fact of the big development of the technology of melting cast iron in electrical furnaces an essential part of it is still obtained in cupolas. In the paper actual tendencies of the improvement of the cupola process with special consideration of the structure principles of cupolas and th[...]
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Archives of Foundry Engineering
EN In the aluminium alloy family, Al-Zn materials with non-standard chemical composition containing Mg and Cu are a new group of alloys, mainly owing to their high strength properties. Proper choice of alloying elements, and of the method of molten metal treatment and casting enable further shaping of [...]
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Archives of Foundry Engineering
EN The study presents the results of own investigations and of the investigations described in technical literature regarding various methods of improving the resistance to carburising of the creep-resistant structural parts of carburising furnaces. Most of the studies referred to were carried out in a[...]
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