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Wyświetlanie 1-15 z 105
Tytuł:
Implementation of Nanoparticles in Materials Applied in Foundry Engineering
Autorzy:
Kmita, A.
Roczniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/381634.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative technologies
nanoparticles
materials
foundry
innowacyjne technologie
nanocząsteczki
materiały odlewnicze
odlewnictwo
Opis:
The ceaseless progress of nanotechnology, observed in the last years, causes that nanomaterials are more and more often applied in several fields of industry, technique and medicine. E.g. silver nanoparticles are used in biomedicine for disinfection and polymer nanoparticles allow insulin transportation in pharmacology. New generation materials containing nanoparticles are also used in the chemical industry (their participation in the commercial market equals app. 53 %). Nanomaterials are used in electronics, among others for semiconductors production (e.g. for producing nanoink Ag, which conducts electric current). Nanomaterials, due to their special properties, are also used in the foundry industry in metallurgy (e.g. metal alloys with nanocrystalline precipitates), as well as in investment casting and in moulding and core sand technologies. Nanoparticles and containing them composites are applied in several technologies including foundry practice, automotive industry, medicine, dentistry etc. it is expected that their role and market share will be successively growing.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 205-209
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attempts to Prepare Precision Composite Castings by Sintering Al2O3/AlSi11 Using Underpressure
Autorzy:
Szymański, P.
Gawdzińska, K.
Nagolska, D.
Powiązania:
https://bibliotekanauki.pl/articles/381239.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
composites
rapid prototyping
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
kompozyty
prototypy
Opis:
This article presents the preparation of composite casts made using the technology of precise casting by the method of melted models. The composite was reinforced with the ceramic sinter from Al2O3 particle shaped in a printed polystyrene female mould, which was fired together with precured ceramics. The resulting ceramic preform, after being saturated with paraffin and after the filling system is installed, was filled with liquid moulding sand and fired together with the mould. The reinforcement was saturated by means of the counter-pressure exerting action on the metal column, being a resultant of pressures inside and outside the chamber. The preliminary assessment showed no apparent defects in the shape of the cast. The casting was measured and the figures were compared with the dimensions of the matrix in which the reinforcing preform was made, the preform after firing and after saturation with paraffin. The results were presented in a table and dimensional deviations were determined. The composite casting was subjected to metallographic tests, which excluded any porous defects or damage to the reinforcement. It can therefore be said that, according to the predictions resulting from the previous calculations, the pressure values used allowed for complete filling of the reinforcement capillaries. The proposed method is therefore suitable for the preparation of precision composite castings with complex shapes.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 49-54
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The silumin coat structure on alloy ductile iron
Autorzy:
Szymczak, T.
Powiązania:
https://bibliotekanauki.pl/articles/383363.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
żeliwo sferoidalne
silumin
innovative casting technologies
dip coats
alloy ductile iron
Opis:
The work presents the research results of the silumin coat structure applied on the carbidic alloy ductile iron with the metal matrix: pearlitic, bainitic and martensitic. The coats were made in the AlSi5 silumin bath at the temperature tk = 750±5ºC. The holding time of cast iron element in the bath was \tau = 180s. Irrespective of the kind of tested ductile iron the obtained coat consisted of three layers with a different phase composition. The first layer from the cast iron ground “g1” is built from Fe4CSi carbide which contains selected alloy additives of the cast iron. On it the second layer “g1” crystallizes. It consists of the AlFeSi inter-metallic phase which can appear in its pure form or contain a small quantity of the alloy additives of the cast iron. The last external part of the layer “g2” mainly consists of the hypo-eutectic phases of silumin. The AlFeSi inter-metallic phases in the form of free precipitations with a lamellar or faceted morphology can also appear there. These phases also can contain a small quantity of the alloy additives of the cast iron. More than that, in all the layers of the coat there are graphite precipitations. The phenomenon of graphite movement to the coat is caused by intensive dissolving of the cast iron element surface by the aluminum of the silumin bath.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1; 119-124
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Chemical Composition of the Matrix on AlSi/SiCp+Cp Composite Structure
Autorzy:
Dolata, A. J.
Dyzia, M.
Powiązania:
https://bibliotekanauki.pl/articles/380736.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative materials
castings defects
aluminium composite structure
innowacyjne technologie odlewnicze
materiały innowacyjne
wady odlewów
Opis:
The casting processes using mechanical stirring of composite suspension are considered for the most economical methods for manufacturing of metal matrix composites in the application and industrial practice. The most common problems during the composite suspensions production include: weak wetting between liquid Al alloy and ceramic particles and gassing of composite mixtures resulting with introducing the particles into aluminium alloy and long-term stirring process. The agglomerates and clusters of particles created among others as an effect of gas blisters absorption on the surface of ceramics causes discontinuity of composite structure and thereby they reduce properties of final products. The porosity has disadvantageous effect on mechanical properties of products, it reduces the corrosion and wear resistance, particularly under technically dry friction conditions. Therefore, to produced the casts composite possessed optimal properties, it is necessary their minimal porosity. To obtaining a good high-quality castings, the proper selection of components, particularly the chemical composition of the Al matrix and the kind of reinforcement are necessary. In this paper, the effect of chemical composition of the matrix on AlSi/SiCp+Cp composite structure were presented.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 135-138
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of microwaves for binder content assessment in moulding sands
Autorzy:
Nowak, D.
Powiązania:
https://bibliotekanauki.pl/articles/380212.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
masa formierska
spoiwo
mikrofale
innovative foundry technologies
moulding sand
binder
microwaves
Opis:
The paper presents results of preliminary examinations on possibility of determining binder content in traditional moulding sands with the microwave method. The presented measurements were carried-out using a special stand, the so-called slot line. Binder content in the sandmix was determined by measurements of absorption damping Ad and insertion losses IL of electromagnetic wave. One of main advantages of the suggested new method of binder content measurement is short measuring time.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 83-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Temperature on Ausferritic Nodular Cast Iron Microstructure
Autorzy:
Gumienny, G.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/379556.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting materials
innovative casting technologies
nodular cast iron
ausferrite
annealing
innowacyjne materiały odlewnicze
innowacyjne technologie
żeliwo sferoidalne
wyżarzanie
Opis:
The work presents the results of the studies of the effect of the temperature on the microstructure of ausferritic nodular cast iron. The ausferrite in the matrix was obtained by way of a specific combination of molybdenum and copper. The cast iron underwent annealing at the temperatures of 520, 550 and 580°C. The work presents the effect of the annealing temperature on the fraction of austenite in the cast iron matrix. The annealed and non-annealed cast iron hardness is given. The work also proves that an increase in the temperature up to 580°C causes a drop in the cast iron hardness.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3 spec.; 21-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New look at the process of reclamation of moulding sands
Autorzy:
Dobosz, S. M.
Major-Gabryś, K.
Hosadyna, M.
Powiązania:
https://bibliotekanauki.pl/articles/380262.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
masa formierska
innovative foundry materials
innovative foundry technologies
moulding sand
reclaim
ester hardener
Opis:
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 least harmful for the reclaim quality. There are two different moulding and core sands taken into examinations. The researches prove that a small correction of their compositions (hardener type) improves the quality of the received reclaims. Carried out in this article studies have shown that such an approach to the problem of reclamation of the moulding and core sands is needed and reasonable.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 19-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Casting routes for porous metals production
Autorzy:
Lichý, P.
Bednarova, V.
Elbel, T.
Powiązania:
https://bibliotekanauki.pl/articles/382433.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
rozwój produktu
pianka metalowa
innovative foundry technologies
innovative foundry material
product development
metal foams
Opis:
The last decade has seen growing interest in professional public about applications of porous metallic materials. Porous metals represent a new type of materials with low densities, large specific surface, and novel physical and mechanical properties, characterized by low density and large specific surface. They are very suitable for specific applications due to good combination of physical and mechanical properties such as high specific strength and high energy absorption capability. Since the discovery of metal foams have been developed many methods and techniques of production in liquid, solid and gas phases. Condition for the use of metal foams - advanced materials with unique usability features, are inexpensive ways to manage their production. Mastering of production of metallic foams with defined structure and properties using gravity casting into sand or metallic foundry moulds will contribute to an expansion of the assortment produced in foundries by completely new type of material, which has unique service properties thanks to its structure, and which fulfils the current demanding ecological requirements. The aim of research conducted at the department of metallurgy and foundry of VSB-Technical University Ostrava is to verify the possibilities of production of metallic foams by conventional foundry processes, to study the process conditions and physical and mechanical properties of metal foam produced. Two procedures are used to create porous metal structures: Infiltration of liquid metal into the mold cavity filled with precursors or preforms and two stage investment casting.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 71-74
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investment Casting of AZ91 Magnesium Open-Cell Foams
Autorzy:
Kapłon, Honorata
Dmitruk, Anna
Naplocha, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/27314112.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
innovative foundry technologies
innovative materials
metal foams
investment casting
magnesium alloy
Innowacyjne technologie odlewnicze
innowacyjne materiały
pianki metalowe
stopy magnezu
Opis:
The process of investment casting of AZ91 magnesium alloy open-cell porosity foams was analysed. A basic investment casting technique was modified to enable the manufacturing of magnesium foams of chosen porosities in a safe and effective way. Various casting parameters (mould temperature, metal pouring temperature, pressure during metal pouring and solidifying) were calculated and analysed to assure complete mould filling and to minimize surface reactions with mould material. The foams manufactured with this method have been tested for their mechanical strength and collapsing behaviour. The AZ91 foams acquired in this research turned out to have very high open porosity level (>80%) and performed with Young’s modulus of ~30 MPa on average. Their collapsing mechanism has turned out to be mostly brittle. Magnesium alloy foams of such morphology may find their application in fields requiring lightweight materials of high strength to density ratio or of high energy absorption properties, as well as in biomedical implants due to magnesium’s high biocompatibility and its mechanical properties similar to bone tissue.
Źródło:
Archives of Foundry Engineering; 2023, 23, 1; 11--16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of reclamability of molding sands with new inorganic binders
Autorzy:
Izdebska-Szanda, I.
Baliński, A.
Angrecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/382753.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
spoiwo nieorganiczne
wytrzymałość
innovative foundry material
innovative foundry technologies
inorganic binders
reclamation
reclamability
strength
Opis:
One of the purposes of the application of chemically modified inorganic binders is to improve knocking out properties and the related reclamability with previously used in foundry inorganic binder (water glass), which allowing the use of ecological binders for casting nonferrous metals. Good knocking out properties of the sands is directly related to the waste sands reclamability, which is a necessary condition of effective waste management. Reclamation of moulding and core sands is a fundamental and effective way to manage waste on site at the foundry, in accordance with the Environmental Guidelines. Therefore, studies of reclamation of waste moulding and core sands with new types of inorganic binders (developed within the framework of the project) were carried out. These studies allowed to determine the degree of recovery of useful, material, what the reclaimed sand is, and the degree of its use in the production process. The article presents these results of investigation. They are a part of broader research programme executed under the project POIG.01.01.02-00-015/09 'Advanced materials and technologies'.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 35-40
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapid Prototyping Technology Using for Casting Process of Mini Turbine Runner
Autorzy:
Hościło, B
Kaczyński, R.
Skorulski, G.
Powiązania:
https://bibliotekanauki.pl/articles/383216.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
rapid prototyping
ceramic moulds
miniturbine runner
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
formy ceramiczne
Opis:
The previous mini-hydrogenator rotors’ prototypes were made of ABS thermoplastic material with use of fused deposition modelling (FDM). However, there is a need for such rotors made of metallic materials with higher strength. In paper three dimensional printing (3DP) as rapid prototyping technology, was presented, to execute a shell mould of rotor prototype. In initial phase, the moulds were prepared which allow to cast a simple geometric solid with different alloys, for comparative reasons. The form of rotor and testing cast moulds were designed using universal CAD environment and printed composite using material zp151 (Calcium sulfate hemihydrate) with a binder zb63 (2- pyrrolidone) for preparation of colourful presentation models or casting models. The suitability of technology usage with alloys of copper , aluminium and zinc, was analyzed. The strength of the mould during casting, a material resistant to high temperature, the quality of received casting and its surface roughness were assumed as the comparative parameters which characterized method.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 83-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Tendency of Moulding Sands to Generate Core Cracks
Autorzy:
Grabarczyk, A.
Dobosz, S. M.
Kusiński, J.
Major-Gabryś, K.
Powiązania:
https://bibliotekanauki.pl/articles/380432.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
moulding sand
binder
elasticity
cracking
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
masa formierska
spoiwo
Opis:
The constant growth of foundry modernization, mechanization and automation is followed with growing requirements for the quality and parameters of both moulding and core sands. Due to this changes it is necessary to widen the requirements for the parameters used for their quality evaluation by widening the testing of the moulding and core sands with the measurement of their resistance to mechanical deformation (further called elasticity). Following article covers measurements of this parameter in chosen moulding and core sands with different types of binders. It focuses on the differences in elasticity, bending strength and type of bond destruction (adhesive/cohesive) between different mixtures, and its connection to the applied bonding agent. Moulding and cores sands on which the most focus is placed on are primarily the self-hardening moulding sands with organic and inorganic binders, belonging to the group of universal applications (used as both moulding and core sands) and mixtures used in cold-box technology.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 157-161
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elasticity of Moulding Sands – a Method of Reducing Core Cracking
Autorzy:
Dobosz, S. M.
Grabarczyk, A.
Major-Gabryś, K.
Powiązania:
https://bibliotekanauki.pl/articles/380966.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
moulding sand
binder
elasticity
cracking
innowacyjne technologie odlewnicze
innowacyjne materiały
piasek formierski
spoiwo
elastyczność
Opis:
This paper focuses on mechanical properties of self hardening moulding sands with furfuryl and alkyd binders. Elasticity as a new parameter of moulding sands is investigated. With the use of presented testing equipment it is possible to determine force kinetics and deformation of moulding sand in real time. The need for this kind of study comes from the modern casting industry. New foundries can be characterized with high intensity of production which is correlated with high level of mechanization and automatization of foundry processes. The increasingly common use of manipulators in production of moulds and cores can lead to generation of new types of flaws, caused by breakage in moulds and cores which could occur during mould assembly. Hence it is required that moulds and cores have high resistance to those kinds of factors, attributing it with the phenomenon of elasticity. The article describes the theoretical basis of this property, presents methods of measuring and continues earlier research.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 31-36
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The structure of the silumin coat on alloy cast steels
Autorzy:
Szymczak, T.
Powiązania:
https://bibliotekanauki.pl/articles/382899.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
powłoka zanurzeniowa
staliwo stopowe
silumin
innovative casting technologies
dip coating
alloy cast steel
Opis:
The work presents the analysis results of the structure of the coat obtained by dipping in silumin AlSi5 of two grades of alloy cast steel: GX6CrNiTi18-10 (LH18N9T) and GX39Cr13 (LH14). The temperature of the silumin bath was 750-5 C, and the hold-up time of the cast steel element [...] = 180 s. The absolute thickness of the coat obtained in the given conditions was g = 104 [...] on cast steel GX6CrNiTi18-10 and g = 132 [...] on GX39Cr13. The obtained coat consisted of three layers of different phase structure. The first layer from the base [...] was constructed of the phase AlFe including Si and alloy additives of the tested cast steel grades: Cr and Ni (GX6CrNiTi18-10) and Cr (GX39Cr13). The second layer [...] of intermetallic phases AlFe which also contains Si and Cr crystallizes on it. The last, external layer 'g2' of the coat consists of the silumin containing the intermetallic phases AlFeSi which additionally can contain alloy additives of the cast steel. It was shown that there were no carbides on the coat of the tested cast steels which are the component of their microstructure, as it took place in the case of the coat on the high speed steels.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 215-220
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Properties of High-Silica Sand at 2.45 GHz
Autorzy:
Opyd, B
Nowak, D.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/382869.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
microwaves
moulding sand
high-silica sand
innowacyjne technologie odlewnicze
mikrofale
masa formierska
piasek kwarcowy
Opis:
In the paper, presented are measurements of permittivity (εr) and dielectric loss factor (tgδ) of high-silica moulding sand, determined at 2.45 GHz by perturbation method on a stand of waveguide resonance cavity. Determined were electrical properties of the main component of moulding sands, i.e. high-silica base, critical for their heating kinetics. The measurements were carried-out for six kinds of high-silica sand with diverse grain size distribution. Analysis of the results indicates that both permittivity and loss tangent values are similar for all kinds of high-silica moulding sand. Irrespective of their grain size analysis, neither of the examined sandmixes shows susceptibility to action of 2.45 GHz microwave field. The presented results make a ground for developing a mathematical model of microwave heating of technological systems composed of moulding sand and foundry tooling.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 136-139
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 105

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