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1
Wpływ procesu żłobienia na właściwości i strukturę staliwa duplex
Żuk M.
Spajanie Materiałów Konstrukcyjnych
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2015
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Nr 4 (30)
28--30
PL
Odlewnictwo metali, a w szczególności staliwa, jest obarczone ryzykiem związanym z wystąpieniem różnego rodzaju wtrąceń oraz nieciągłości struktury. W związku z tym koniecznością stało się opracowanie metod naprawy wad, używając do tego m. in. technik spawalniczych
2
Content available Overview of activities on the internet devoted to casting technology
Wilk-Kołodziejczyk D., Regulski K., Dziaduś-Rudnicka J., Kluska-Nawarecka S.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 2
245-250
EN
Article present various forms of transfer of information available on the Internet. An attempt was made to show the possibility of such a selection of the knowledge sources that, taking into account user preferences, would arouse his interest, showing in parallel the intended substantive content. This commitment is shown in the context of the current assumptions of building a platform dedicated to support the needs of production processes in foundry and metallurgy.
3
Content available remote Optimising the composition of natural moulding sands including thermal aspects
Kowalski J. S.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 2
65-68
EN
The paper discusses the problem of the choice of the moulding sand mixture composition in terms of the sand behaviour in contact with molten metal. Studies of high-temperature phenomena make assessment of the sand composition applicability under real operating conditions possible, thus leading to the elimination of sand-originating casting defects. The research was conducted on selected moulding materials included in the composition of traditional moulding sand mixtures without the addition of carbon. The effect of moulding sand composition and moisture content on the linear dilatation and stress-induced allotropic changes of quartz was examined. The analysis of these phenomena was based on 3D charts and maps generated from data collected during the tests.
4
Content available remote The effect of refractory coating permeability on the Lost Foam Process
Pacyniak T.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 3
199-204
EN
The article analyses the effect of refractory coating permeability on the process of casting manufacture by the Lost Foam technique. The analysis was focussed on simulation tests examining the effect of coating permeability on the mould cavity filling rate, pressure in gas gap, and the size of this gap. In simulation tests of the Lost Foam Process, a mathematical model of the process presented in this study and the author's own computation algorithm were used. The computations have proved that with increasing permeability of the protective coating, the pouring rate increases, too, while pressure of gas in the gas gap and the size of the gap are decreasing. The increasing pouring rate ensures correct making of castings, even if their shape is very intricate and the wall cross-sections are very small. Smaller size of the gas gap and lower gas pressure in the gap reduce the risk of mould damage. The author's own investigations confirmed the importance of the refractory coating permeability and its effect on the casting process, mould pouring rate - in particular.
5
Content available remote Modeling of mould cavity filling process with cast iron in Lost Foam method Part 3. Mathematical model – pressure inside the gas gap
Pacyniak T., Kaczorowski R.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 3s
79--83
EN
In this work mathematical model describing changes of pressure inside the gas gap was shown during manufacturing gray cast iron castings with use of lost foam process. Authors analyzed the results of numerical simulation enclosing influence of foamed polystyrene pattern density, permeability and thickness of refractory coating on pressure changes in the gap. Studies have shown, that all these parameters have significant influence on pressure inside the gas gap.
6
Content available remote Modeling of mould cavity filling process with cast iron in Lost Foam method Part 2. Mathematical model – Pouring rate
Pacyniak T., Kaczorowski R.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 3s
75--78
EN
In this work pouring rate equation for cast iron in lost foam process was shown. For description of this phenomenon the motion dynamic equation was used. Pressure affecting the liquid cast iron surface was described using Bernoulli formulae. Numerical simulation results were analyzed with respect to permeability, refractory coating thickness and foamed polystyrene pattern density influence on pouring rate.
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