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Dobór materiału na elementy robocze maszyn pracujących w oczyszczalniach ścieków komunalnych

Uhl W., Jaśkowiec K.

Prace Instytutu Odlewnictwa

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2015

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T. 55, nr 4

33--39

PL

W części badawczej zaproponowano kilka rodzajów tworzyw (żeliwo ADI – które poddano czterem rodzajom obróbki cieplnej, staliwo manganowe oraz staliwo niklowo-miedziowe), zastosowanie których powinno zapewnić odpowiednią trwałość roboczych elementów maszyn pracujących w oczyszczalniach ścieków, przy jednoczesnym obniżeniu ich ceny. Omówiono pokrótce te tworzywa. Opracowano technologię wykonania form na przedmiotowe elementy. Przeprowadzono obróbkę wykańczającą wykonanych odlewów. Dokonano pomiaru twardości, następnie odlewy przekazano do pracy w oczyszczalni ścieków, gdzie po ich zamontowaniu prowadzone były badania eksploatacyjne.

EN

In the research part of this study, several types of materials were proposed, including ADI (Austempered Ductile Iron) subjected to four different types of heat treatment, using cast manganese steel and cast nickel-copper steel. The use of these materials should provide adequate performance life to machine parts operating in wastewater treatment plants while also reducing the cost of manufacture. The selected materials were briefly discussed. A mould making technology was developed to make the respective cast parts. Castings were subjected to a finishing treatment and after hardness measurements were transferred to a wastewater treatment plant, where they were assembled to carry out the field tests.

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Application of microwaves for innovative hardening of environment-friendly water-glass moulding sands used in manufacture of cast-steel castings

Stachowicz M., Grant K., Nowak D.

Archives of Civil and Mechanical Engineering

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2011

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Vol. 11, no 1

209-219

EN

The paper presents examination results on possible implementing an innovative microwave technology for manufacture of high-quality, economic cores of water-glass moulding sands. A special attention was paid to improving technological properties of the examined moulding sands and in particular of their strength and knocking-out properties by selecting proper parameters of the hardening process. In addition, some benefits are indicated, resulting from applying such an innovative and environment-friendly solution effectively replacing traditional and energy-consuming processes of preparing moulding cores.

PL

W pracy przedstawiono wyniki badań nad możliwością wprowadzenia innowacyjnej technologii mikrofalowej do produkcji wysokiej jakości, oszczędnościowych rdzeni z mas sporządzonych ze szkłem wodnym - uwodnionym krzemianem sodu. W badaniach zwrócono szczególną uwagę na poprawę właściwości technologicznych badanych mas, a szczególnie ich wytrzymałości oraz wybijalności, poprzez dobór odpowiednich parametrów procesu utwardzania. Wskazano ponadto na korzyści wynikające z zastosowania takiego innowacyjnego i proekologicznego rozwiązania skutecznie zastępującego tradycyjne i energochłonne procesy wykonywania rdzeni odlewniczych.

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Microadditions of boron and vanadium in ADI. Pt 2. Own investigations

Pirowski Z., Wodnicki J., Olszyński J.

Prace Instytutu Odlewnictwa

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2008

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T. 48, z. 3

49-56

EN

In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigations were presented. Within this study two series of melts of the ductile iron were made, introducing microadditions of the above mentioned elements to both unalloyed ductile iron and the ductile iron containing high levels of nickel and copper (the composition typical of ADI). Melts were conducted with ironnickel-magnesium master alloy. Thermal analysis of the solidification process of the cast keel blocks was conducted, the heat treatment of the alloys was carried out, and then the effect of the introduced additions of boron and vanadium on the hardenability of the investigated cast iron was examined and evaluated.

PL

W drugiej części pracy, opisującej rolę mikrododatków wanadu i boru w procesie kształtowania się struktury grubościennych odlewów z żeliwa ADI, omówiono wyniki przeprowadzonych badań własnych. W ramach pracy wykonano dwie serie wytopów żeliwa sferoidalnego wprowadzając mikrododatki tych pierwiastków zarówno do niestopowego żeliwa sferoidalnego, jak też do żeliwa zawierającego zwiększoną zawartości niklu i miedzi (skład typowego żeliwa ADI). Wytopy prowadzono stosując zaprawy żelazowo-niklowo-magnezowe. Przeprowadzono analizę termiczną procesu krzepnięcia odlewanych wlewków, wykonano obróbkę cieplną otrzymanych stopów, a następnie oceniono wpływ wprowadzanych dodatków boru i wanadu na hartowność badanego żeliwa.

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Properties of made by different methods of RP impeller foundry patterns

Budzik G.

Archives of Foundry Engineering

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2007

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Vol. 7, iss. 2

83-86

EN

This article presents the tests of properties of foundry patterns of turbocharger turbine impeller. Impellers prototypes were predestinated for casting by method losing patterns. There were carried out tests of these prototypes made by different methods of Rapid Prototyping (RP). Two impeller were made by growth methods: stereolitography (SLA) and three dimensional printing (3DP). One prototype was made by the method of Vacuum Casting as a wax casting. Tests were executed in the Department of Machine Design of Rzeszow University of Technology in cooperation with WSK PZL Rzeszow and Car Technology Krakow. First impeller was carried out by method of stereolitography on SLA 250 plant. That pattern was also used to carry out silicon matrix for casting of wax pattern. Next pattern was printed by three dimensional printer Z510 from the powder ZP14. Good removability of the pattern from the mould is particularly essential for impellers of small turbines with blades of small thickness of their section. All pattern were tested on their removability from the ceramic mould. The best melting properties had the wax pattern. Patterns made from resin SL5170 (SLA) and powder ZP14 (3DP) were removed in the process of burning but about 1% of soot was left in the mould.

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Possibilities of utilizing 3DP technology for foundry mould making

Budzik G.

Archives of Foundry Engineering

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2007

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Vol. 7, iss. 2

65-68

EN

Possibilities of application of three-dimensional printing (3DP) technology for making casting prototypes are discussed. Three-dimensional printing enables making of foundry moulds for elements of complex shapes. The mould presented in the paper was printed with the use of Z510 Spectrum unit in the Car Technology Sp. z o.o. (Ltd. Co.) in Kraków. The basic material for printing foundry moulds is the ZCast 501 powder. This powder is a mixture of traditional molding sand, gypsum and supplementary ingredients. The mould is made in ZCast technology, and it enables casting of zinc, magnesium and aluminum alloys at max. pouring temperature of 1100°C. The paper describes research on the possibility to utilize a standard ZP14 powder for building a rotor blade casting moulds. The research has showed that the ZP14 powder may serve for printing foundry moulds, which should then be subjected to thermo-chemical treatment. Application of the basic ZPrint system powder permits a reduction in mould manufacturing costs.