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    Wyświetlanie 1-14 z 14
    Tytuł:
    Cracking of Pad-Welded Inconel 713C Precision Castings
    Autorzy:
    Adamiec, J.
    Łyczkowska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381898.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Inconel 713C
    nickel alloy
    cracking
    cast repairing
    stop niklu
    pękanie
    naprawa odlewu
    Opis:
    Inconel 713C is a nickel-based casting alloy characterised by improved heat and creep resistance [1]. It is used e.g. in aircraft engine components, mainly in the form of precision castings. Precision casting enables very good reproduction of complex shapes. However, due to major differences in casting wall thickness and the resultant differences in rigidity, defects can form in precision castings. The most common defects in precision castings are shrinkage porosities and microcracks. Inconel 713C is considered to be a difficult-to-weld or even non-weldable alloy. However, the need to repair precision castings requires attempts to develop technologies for their remelting and pad welding which could be used in industrial practice. This article presents the results of tests consisting in TIG pad welding of defects identified in precision castings intended for the aircraft industry. It was found that the main reason behind failed attempts at repairing precision castings by welding technologies was hot cracking in the fusion zone. Such cracks form as a result of the partial melting of intercrystalline regions along the fusion line. The deformations occurring during the crystallization of the melting-affected zone (fusion zone + partially melted zone + heat affected zone) or pad weld lead to the rupture of the intercrystalline liquid film. Hot cracks form within the so-called high-temperature brittleness range (HTBR) of the alloy. Another type of cracks that was identified were ductility dip cracks (DDC), whose formation is related to the partial melting of carbides.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 215-219
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Repair of Precision Castings Made of the Inconel 713C Alloy
    Autorzy:
    Łyczkowska, K.
    Adamiec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381369.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    weldability
    Inconel 713C
    precision castings
    hot cracks
    spawalność
    odlewy precyzyjne
    pęknięcia
    Opis:
    Inconel 713C precision castings are used as aircraft engine components exposed to high temperatures and the aggressive exhaust gas environment. Industrial experience has shown that precision-cast components of such complexity contain casting defects like microshrinkage, porosity, and cracks. This necessitates the development of repair technologies for castings of this type. This paper presents the results of metallographic examinations of melted areas and clad welds on the Inconel 713C nickel-based superalloy, made by TIG, plasma arc, and laser. The cladding process was carried out on model test plates in order to determine the technological and material-related problems connected with the weldability of Inconel 713C. The studies included analyses of the macro- and microstructure of the clad welds, the base materials, and the heat-affected zones. The results of the structural analyses of the clad welds indicate that Inconel 713C should be classified as a low-weldability material. In the clad welds made by laser, cracks were identified mainly in the heat-affected zone and at the melted zone interface, crystals were formed on partially-melted grains. Cracks of this type were not identified in the clad welds made using the plasma-arc method. It has been concluded that due to the possibility of manual cladding and the absence of welding imperfections, the technology having the greatest potential for application is plasma-arc cladding.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 210-216
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of Precision Castings Made of the Inconel 713C Alloy
    Autorzy:
    Łyczkowska, K.
    Adamiec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382665.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting defect
    nickel alloy
    Inconel 713C
    precision casting
    pad welding
    wada odlewu
    stop niklu
    odlewanie precyzyjne
    napawanie
    Opis:
    Inconel 713C alloy belongs to the group of materials with high application potential in the aerospace industry. This nickel alloy has excellent features such as high strength, good surface stability, high creep and corrosion resistance. The paper presents the results of metallographic examinations of a base material and padding welds made by laser beam on the Inconel 713C alloy. The tests were made on precisely cast test plates imitating low - pressure turbine blades dedicated for the aerospace industry. Observations of the macro- and microstructure of the padding welds, heat-affected zone and base material indicate, that the Inconel 713C alloy should be classified as a hard-to-weld material. In the investigated joint, cracking of the material is disclosed mainly in the heat-affected zone and at the melted zone interface, where pad weld crystals formed on partially melted grains. The results show that phases rich with chromium and molybdenum were formed by high temperature during welding process, which was confirmed by EDS analysis of chemical composition.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 19-24
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of Virtual Engineering and Additive Manufacturing for Rapid Prototyping of Precision Castings
    Autorzy:
    Krutiš, V.
    Šprta, P.
    Kaňa, V.
    Zadera, A.
    Cileček, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837786.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product development
    innovative foundry technologies
    virtual engineering
    rapid prototyping
    rozwój produktu
    innowacyjne technologie odlewnicze
    inżynieria wirtualna
    prototyp
    Opis:
    The present paper is concerned with the practical interconnection between virtual engineering tools and additive model manufacturing technologies and the subsequent production of a ceramic shell by rapid prototyping with the use of Cyclone technology to produce the aluminium casting prototype. Prototypes were developed as part of the student formula project, where several parts originally produced by machining were replaced by castings. The techniques of topological optimization and the combination with the tools of the numerical simulation were used to optimise the virtual prototype before a real production of the first prototype. 3D printing of wax pattern ensured direct and fast assembly of the cluster without any additional operations and troubles during dewaxing. The shell was manufactured in 6 hours thanks to a system of quick-drying of individual layers of ceramic shell. It has been verified that the right combination of individual virtual tools with the rapid prototyping can shorten the development time and delivery of the first prototypes from a few months to a few weeks.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 51-55
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of Virtual Engineering and Additive Manufacturing for Rapid Prototyping of Precision Castings
    Autorzy:
    Krutiš, V.
    Šprta, P.
    Kaňa, V.
    Zadera, A.
    Cileček, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837847.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product development
    innovative foundry technologies
    virtual engineering
    rapid prototyping
    rozwój produktu
    innowacyjne technologie odlewnicze
    inżynieria wirtualna
    prototyp
    Opis:
    The present paper is concerned with the practical interconnection between virtual engineering tools and additive model manufacturing technologies and the subsequent production of a ceramic shell by rapid prototyping with the use of Cyclone technology to produce the aluminium casting prototype. Prototypes were developed as part of the student formula project, where several parts originally produced by machining were replaced by castings. The techniques of topological optimization and the combination with the tools of the numerical simulation were used to optimise the virtual prototype before a real production of the first prototype. 3D printing of wax pattern ensured direct and fast assembly of the cluster without any additional operations and troubles during dewaxing. The shell was manufactured in 6 hours thanks to a system of quick-drying of individual layers of ceramic shell. It has been verified that the right combination of individual virtual tools with the rapid prototyping can shorten the development time and delivery of the first prototypes from a few months to a few weeks.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 37-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shape Accuracy of Iron Precision Castings in Terms of Ceramic Moulds Physical Properties Anisotropy
    Autorzy:
    Biernacki, R.
    Haratym, R.
    Tomasik, J.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381373.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ceramic moulds
    precision castings
    anisotropy
    formy ceramiczne
    odlewy precyzyjne
    anizotropia
    Opis:
    While analyzing shape accuracy of ferroalloy precision castings in terms of ceramic moulds physical anisotropy, low-alloy steel castings ("cover") and cast iron ("plate") were included. The basic parameters in addition to the product linear shape accuracy are flatness deviations, especially due to the expanded flat surface which is cast plate. For mentioned castings surface micro-geometry analysis was also carried, favoring surface load capacity tp50 for Rmax = 50%. Surface load capacity tp50 obtained for the cast cover was compared with machined product, and casting plate surface was compared with wear part of the conveyor belt. The results were referred to anisotropy of ceramic moulds physical properties, which was evaluated by studying ceramic moulds samples in computer tomography equipment Metrotom 800.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Impact of the Multilayer Ceramic Moulds Quality on the Steel Precision Castings Dimensional Accuracy
    Autorzy:
    Haratym, R.
    Biernacki, R.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379697.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lost wax casting
    dimensional accuracy
    multilayer ceramic mould
    ceramic mould expansion
    metoda traconego wosku
    dokładność wymiarowa
    forma wielowarstwowa
    forma ceramiczna
    Opis:
    Results of analysis presented in this paper were based on analysis of casts made especially for this research purpose and related to actual cast – industrial. The evaluation of the dimensional accuracy of casts was made in relation to the pressure of the liquid metal with consideration of the ceramic mould temperature. Ceramic moulds used in these analyses were made from crystalline quartz with an aqueous colloidal silica binder containing polymers (KK), and ethyl silicate (KE).
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2 spec.; 27-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of the Properties of Materials for Foundry Patterns Used in the Production of High-quality Precision Castings
    Autorzy:
    Dydak, A.
    Książek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840895.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    3D printing
    rapid prototyping
    plastics patterns
    precision casting
    drukowanie 3D
    szybkie prototypowanie
    tworzywa sztuczne
    odlewanie precyzyjne
    Opis:
    The paper presents the properties of plastics under the trade names of PMMA and Midas, and of Formowax, Romocast 305 and Romocast 930 casting waxes. Their effect on the quality of foundry patterns used in the manufacture of ceramic moulds for precision casting is also discussed. From the selected materials for foundry patterns, samples were made for testing using the following methods: (i) 3D printing in the case of plastics, and (ii) conventional method based on tooling in the form of metal moulds (dies) in the case of casting waxes. The most important physico-mechanical properties of materials for foundry patterns were determined, i.e. linear shrinkage, softening temperature, relative elongation and coefficient of thermal linear expansion. Bending tests were carried out on samples of patterns printed and made in metal moulds, including determination of the surface roughness of patterns. After the process of melting out patterns from the cavities of ceramic moulds in an autoclave, the degree of their melting out was visually assessed (i.e. the residues from pattern removal were evaluated). The ash content after burning out of foundry patterns was also determined. The conducted tests allowed comparing the important parameters of materials used for foundry patterns and assessing the suitability of selected plastics as a material for foundry patterns used in the manufacture of high-quality precision castings.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 55-60
    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 quality of precision steel castings produced in the Replicast CS process
    Jakość staliwnych odlewów precyzyjnych wytwarzanych w procesie Replicast CS
    Autorzy:
    Tomasik, J.
    Haratym, R.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381134.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    quality of cast
    surface microgeometry
    Replicast CS process
    dimensional accuracy
    jakość odlewu
    mikrogeometria powierzchni
    proces Replicast CS
    dokładność wymiarowa
    Opis:
    The quality in ceramic mould precision casting process include mostly surface quality of casts and their dimensional accuracy represented by six sigma deviation from the nominal dimensions (ΔL6δ). This article present achieved results of examination of cast’s surface finish. The dimensional analysis accuracy of expended polystyrene patterns and castings made from these patterns was executed.
    Jakość w procesie odlewnictwa precyzyjnego w formy ceramiczne obejmuje przede wszystkim stan powierzchni odlewów i ich dokładność wymiarową rozumianą jako odchyłkę sześciosigmową wymiarów nominalnych (ΔL6δ). W artykule zaprezentowano uzyskane wyniki badań stanu powierzchni odlewów. Wykonano analizę dokładności modeli z polistyrenu i odlewów wykonanych na tych modelach.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 209-212
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anizotropia właściwości fizycznych form ceramicznych wpływających na ekologiczne wytwarzanie aluminiowych odlewów precyzyjnych
    Anisotropy of ceramic moulds physical properties which affect environmentally friendly production of precision aluminum castings
    Autorzy:
    Haratym, R.
    Lewiński, J.
    Biernacki, R.
    Kowaluk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382967.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ochrona środowiska
    forma ceramiczna
    anizotropia właściwości fizycznych
    ekologia wytwarzania
    environment protection
    ceramic mould
    physical properties
    Opis:
    W referacie przedstawiono analizę parametrów powodujących anizotropię właściwości fizycznych form ceramicznych wpływającą na jakość odlewów z aluminium. Przeprowadzono ocenę oryginalnych badań takich, jak przepływ gazów przez ścianki formy, trzypunktowa ocena wytrzymałości formy na zginanie, stan warstwy wierzchniej formy w aspekcie jej zwilżalności przez ciekły metal oraz sprawdzono porowatość formy ceramicznej w badaniach z użyciem tomografu komputerowego. Przeprowadzono ocenę wpływu właściwości form ceramicznych na jakość odlewów w aspekcie ich wytwarzania.
    The paper presents analysis of parameters affecting the anisotropy of ceramic moulds physical properties which affect quality of aluminum castings. An evaluation of original research, such as the permeability of mould surface, three-point bending strength, the state of mould surface layer in terms of wettability by the liquid metal, and ceramic molud porosity tested in studies using a CT (computerized tomography) scanner. Investigation of impact made by ceramic mold properties on casting quality in terms of their production was also made.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 53-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Błędy kształtu, porowatość wewnętrzna, dokładność wymiarów liniowych staliwnych odlewów precyzyjnych w aspekcie ekologii ich wytwarzania
    Shape errors, internal porosity, linear dimensional accuracy of precision steel castings in terms of their environmentally friendly production
    Autorzy:
    Tomasik, J.
    Sieczka, M.
    Haratym, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/382747.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ochrona środowiska
    odlew precyzyjny
    błąd kształtu
    dokładność wymiarowa
    environment protection
    investment casting
    shape error
    dimensional accuracy
    Opis:
    Dokonano kompleksowej oceny jakości odlewów precyzyjnych przez badanie warstwy wierzchniej, ocenę błędu kształtu, dokładności wymiarów liniowych. Badania wykonano w oparciu o nowoczesną aparaturę, miedzy innymi zastosowano maszynę pomiarową Zeiss Calypso. Otrzymane wyniki badań pozwolą na zastosowanie optymalnej technologii wytwarzania odlewów w procesie wytapianych modeli w aspekcie ekologii.
    Comprehensive assessment of precision castings quality was done by investigation of surface layer, shape errors, and accuracy of linear dimensions. The study was performed on modern apparatus, among other uses measuring machine Zeiss Calypso. The obtained results will allow usage of optimal lost wax casting process in environmentally friendly cast production.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 191-194
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Roughness of surface of vacuum castings prepared in plaster moulds
    Autorzy:
    Pawlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382696.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modern casting material
    modern casting technology
    precision casting
    plaster mould
    surface roughness
    nowoczesny materiał odlewniczy
    nowoczesna technologia odlewnicza
    odlewanie precyzyjne
    forma gipsowa
    chropowatość powierzchni
    Opis:
    The results of researches on surface roughness of CuSn10 and CuSn5Zn5Pb5 bronzes and aluminum AlSi11 alloy vacuum castings prepared in plaster moulds are presented in this paper. Test samples were cut from stripe castings of dimensions 100x15x1 mm. Surfaces were carefully cleaned with use of soft brush than in ultrasonic washer and dried. Experimental castings were prepared in moulds made of two types of plaster. Cast temperatures were 1120 and 1200°C for bronzes and 700 and 800°C for silumin. Temperatures of the mould were 500 and 600°C for bronzes and 200 and 300°C for aluminum alloy. The roughness measurements were carried out with use of Hommelwerke Tester T1000. The average arithmetic deviation of roughness profile Ra, the ten-point height of irregularities Rz and maximum peak to valley height Rm, were measured. It can be stated, on the base of obtained results, that technology of casting in plaster moulds allows preparation of castings of very low roughness, average Ra=0,88÷1,74μm for bronzes and Ra=0,59÷0,83μm for aluminum alloys. Roughness of the surface depends in fact on the cast material. Type of plaster and casting parameters have negligible influence on it.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 157-162
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Quality of Steel Castings in Terms of Precision Ceramic Mould Structure
    Autorzy:
    Biernacki, R.
    Haratym, R.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379806.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lost wax casting
    casting surface microgeometry
    ceramic mould structure
    metoda traconego wosku
    mikrogeometria powierzchni
    powierzchnia odlewu
    forma ceramiczna
    Opis:
    In the opinion of metrologists, technologists and trybologists surface microgeometry is one of the most important factors affecting the performance characteristics of the machine parts (resistance to wear, sliding and lubricating properties, durability and tightness of joints, fatigue strength, corrosion resistance, etc.). The analysis was made of the ceramic mould elements structure influence on the microgeometry of steel castings surface and their dimensional accuracy. To assess the structure of the ceramic mould previous studies made with usage of computer tomography where used, those studies highlight the ceramic mould structure anisotropy and its properties.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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