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    Wyświetlanie 1-11 z 11
    Tytuł:
    The Influence of Pressure Die Casting Parameters on the Mechanical Properties of AlSi11/10 Vol.% SiC Composite
    Autorzy:
    Konopka, Z.
    Pasieka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383001.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composites
    pressure die casting
    mechanical properties
    kompozyty
    odlewnictwo ciśnieniowe
    właściwości mechaniczne
    Opis:
    The paper presents the method of preparing a composite slurry composed of AlSi11 alloy matrix and 10 vol.% of SiC particles, as well as the method of its high-pressure die casting and the measurement results concerning the tensile strength, the yield point, the elongation and hardness of the obtained composite. Composite castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and various injection gate width values. There were found the regression equations describing the change of mechanical properties of the examined composite as a function of pressure die casting process parameters. The conclusion gives the analysis and the interpretation of the obtained results.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 59-62
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological Properties of AlSi11-SiCp Composite Castings Produced by Pressure Die Casting Method
    Autorzy:
    Konopka, Z.
    Pasieka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/379787.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composites
    pressure die casting
    tribological properties
    kompozyty
    odlewnictwo ciśnieniowe
    właściwości tribologiczne
    Opis:
    The measurement results concerning the abrasive wear of AlSi11-SiC particles composites are presented in paper. The method of preparing a composite slurry composed of AlSi11 alloy matrix and 10, 20% vol.% of SiC particles, as well as the method of its high-pressure die casting was described. Composite slurry was injected into metal mould of cold chamber pressure die cast machine and castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and various injection gate width values. Very good uniform arrangement of SiC particles in volume composite matrix was observed and these results were publicated early in this journal. The kinetics of abrasive wear and correlation with SiC particles arrangement in composite matrix were presented. Better wear resistance of composite was observed in comparison with aluminium alloy. Very strong linear correlation between abrasive wear and particle arrangement was observed. The conclusion gives the analysis and the interpretation of the obtained results.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of 2D and 3D Surface Roughness of Die Castings from Alloy AlSi9Cu3
    Autorzy:
    Pałyga, Ł.
    Stachowicz, M.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382625.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    die casting
    roughness
    surface parameters
    SEM
    odlewnictwo ciśnieniowe
    chropowatość
    parametry powierzchniowe
    Opis:
    This paper presents the possibility of evaluating the 3D surface roughness of a raw die castings made from alloy AlSi9Cu3, group EN AB- 46000. Castings were produced on BUHLER H630-B die casting machine with various piston speed. The study was conducted on casting bracket for seatbacks office chair, whose surface do not require further machining to obtain adequate surface quality. In order to reduce the impact of possible surface mold roughness wear, the specimen has been taken from the places furthest away from the supply system. Evaluates of 3D surface roughness of specimens was performed on specialized software delivered with scanning electron microscope. After conducting a series of test on surface topography was evaluated roughness of raw castings produced with variable parameters of process control, such as piston speed during II Phase. It was found that the method used to measure 2D and 3D roughness parameters could be more practical in evaluating the quality of die castings, but it should be combined with the way their manufacturing and other destructive and non-destructive evaluation.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 75-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Hold Time and Temperature on Characteristic Quantities of TDA Curves
    Autorzy:
    Szymczak, T.
    Gumienny, G.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382413.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theory of crystallization
    pressure die casting
    TDA method
    teoria krystalizacji
    odlewnictwo ciśnieniowe
    metoda ATD
    Opis:
    This paper presents the effect of the temperature and hold time in the holding furnace of 226 silumin on the characteristic quantities of TDA curves. The temperature of phase transformations and the cooling rate were tested. It has been shown that increasing both the hold time and the temperature in the holding furnace cause the decreasethe end ofα+Al9Fe3Si2+β and α+Al2Cu+β ternary eutectics crystallization temperature in the tested silumin. This is due to the fact an increase in amounts of impurities as a result of reacting the liquid alloy with the gases contained in the air. It has been shown, however, that examined technological factors of the metal preparation do not cause systematic changes in the cooling rate.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 113-116
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of reinforcing particles in the pressure die cast AlSi11/20% SiC composite
    Rozmieszczenie cząstek fazy zbrojącej w odlewanym ciśnieniowo kompozycie AlSi11/20% SiC
    Autorzy:
    Pasieka, A.
    Konopka, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/354366.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal matrix composites
    pressure die casting
    reinforcing particles distribution
    kompozyty metalowe
    odlewnictwo ciśnieniowe
    rozmieszczenie cząstek
    Opis:
    A method of pressure die casting of composites with AlSi11 alloy matrix reinforced with 20 vol. % of SiC particles and the analysis of the distribution of particles within the matrix are presented. The composite castings were produced at various values of the piston velocity in the second stage of injection, at diverse intensification pressure values, and various injection gate width values. The distribution of particles over the entire cross-section of the tensile specimen is shown. The index of distribution was determined on the basis of particle count in elementary measuring fields. The regression equation describing the change of the considered index was found as a function of the pressure die casting parameters. The conclusion presents an analysis of the obtained results and their interpretation.
    Przedstawiono metodykę odlewania ciśnieniowego kompozytów na osnowie stopu AlSi11 zbrojonego 20% udziałem objętościowym cząstek SiC i ich rozmieszczenia w osnowie. Odlewy kompozytowe wykonano przy różnych wielkościach prędkości tłoka w II fazie ruchu, ciśnieniu doprasowania i szerokości szczeliny wlewowej. Przedstawiono rozmieszczenie cząstek SiC na całym przekroju odlewu próbki do badania rozciągania. Na podstawie zliczeń liczby cząstek w elementarnych polach pomiarowych określono wskaźnik ich rozmieszczenia. Obliczono równanie regresji zmiany tego wskaźnika jako funkcję parametrów odlewania ciśnieniowego. W podsumowaniu przedstawiono analizę uzyskanych wyników i ich interpretację.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 2; 767-770
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Friction Stir Processing of an AlSi6Cu4 cast aluminium alloy
    Badanie procesu tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału odlewniczego stopu aluminium AlSi6Cu4
    Autorzy:
    Węglowski, M. S.
    Dymek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381817.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    surface treatment
    Friction Stir Processing
    die casting
    aluminium alloy
    obróbka powierzchniowa
    odlewnictwo ciśnieniowe
    stop aluminium
    Opis:
    The present paper deals with the Friction Stir Processing (FSP) of an AlSi6Cu4 cast aluminium alloy. The emphasis was placed on the determination of an influence FSP parameters and the torque action on the tool. It was found that an increase in rotational speed of the tool causes a decrease in the torque. Simultaneously, the results showed that an increase in travelling speed of the tool brings about an increase in the torque. The metallographic examination of the processed surface layer of the material has shown that the depth of the layer in which the microstructure was modified by the shoulder action depends to a large extent on the rotation speed and to a lesser extent on the travelling speed.
    W pracy przedstawiono wyniki badań procesu FSP prowadzonego na odlewniczym stopie aluminium AlSi6Cu4. Badania obejmowały określenie wpływu warunków prowadzenia procesu na wartość momentu działającego na narzędzie. Wyniki badań wykazały, że wzrost prędkości obrotowej narzędzia powoduje zmniejszenie momentu działającego na nie. Równocześnie wykazano, iż wzrost prędkości przesuwu narzędzia powoduje wzrost momentu. Z badań metalograficznych wynika, że głębokość oddziaływania narzędzia w dużym stopniu zależy od prędkości obrotowej narzędzia, a w mniejszym od prędkości jego przesuwu.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 213-216
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Selected Factors on Thermal Fatigue of the ADI in an Aspect of its Suitability as the Material for Metal Moulds
    Wpływ wybranych czynników na zmęczenie cieplne żeliwa ADI w aspekcie jego przydatnosci jako materiału na formy metalowe
    Autorzy:
    Zych, J.
    Wróbel, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/356751.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile iron
    ADI
    thermal fatigue
    metal moulds
    pressure die casting
    żeliwo
    żeliwo ADI
    zmęczenie cieplne
    forma metalowa
    odlewnictwo ciśnieniowe
    Opis:
    The investigation results of the thermal fatigue resistance of two ADI grades (EN-GJS-1200-2 and EN-GJS-800-8) are presented in the paper. Tests were performed on the author’s research stand, by means of the resistance heating of samples acc. L.F. Coffin method. The thermal fatigue resistance is the basic criterion in assessing the material suitability for metal moulds. The maximal temperature (Tmax) of thermal cycles influence on their number, which the sample can withstand before cracking, were estimated. Structure transformations, hardness and strength changes of the austempered ductile iron (ADI) were analysed. It was found, that at cyclic heating to Tmax <500°C, the ADI retains its primary ausferritic structure, even after more than 10.000 thermal cycles. Such ADI behaviour predisposes it to be applied as a material for metal moulds used in the pressure die casting, it means mainly at casting Mg and Zn alloys as well as for small castings of Al alloys.
    W pracy przedstawiono wyniki badań odporności na zmęczenie cieplne dwóch gatunków żeliwa ADI (EN-GJS-1200-2 i EN-GJS-800-8). Badania prowadzono na autorskim stanowisku badawczym stosując oporowe nagrzewanie próbek, wg metody L.F. Cottina. Odporność na zmęczenie cieplne jest podstawowym kryterium w ocenie przydatności tworzywa (materiału) na formy metalowe, które podlegają cyklicznemu nagrzewaniu. Oceniono wpływ maksymalnej temperatury (Tmax) cykli cieplnych na ich liczbę do pęknięcia próbki, analizowano zmiany struktury żeliwa ADI. zmiany twardości i wytrzymałości. Stwierdzono, iż przy cyklicznym nagrzewaniu do Tmax<500°C, żeliwo ADI zachowuje swoją pierwotną strukturę ausferrytu nawet po wykonaniu ponad 10.000 cykli cieplnych. Takie zachowanie żeliwa ADI predysponuje go jako materiał na formy metalowe stosowane w odlewnictwie ciśnieniowym, a więc przy odlewaniu głównie stopów Mg i Zn, ale również dla mniejszych odlewów wykonywanych ze stopów Al.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 2; 693-697
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlations Between Arrangement of Reinforcing Particles and Mechanical Properties in Pressure Die Cast AlSi11-SiC Composites
    Autorzy:
    Konopka, Z.
    Pasieka, A.
    Łągiewka, M.
    Nadolski, M.
    Zyska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380134.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pressure die casting
    metal matrix composites (MMCs)
    aluminium alloys
    structure
    mechanical properties
    odlewnictwo ciśnieniowe
    kompozyty metalowe (MMC)
    stopy aluminium
    struktura
    właściwości mechaniczne
    Opis:
    The work presents the investigation results concerning the structure of composite pressure die castings with AlSi11 alloy matrix reinforced with SiC particles. Examination has been held for composites containing 10 and 20 volume percent of SiC particles. The arrangement of the reinforcing particles within the matrix has been qualitatively assessed in specimens cut out of the castings. The index of distribution was determined on the basis of particle count in elementary measuring fields. The tensile strength, the yield point and elongation of the obtained composite were measured. Composite castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and various injection gate width values. The regression equation describing the change of the considered arrangement particles index and mechanical properties were found as a function of the pressure die casting parameters. The infuence of particle arrangement in composite matrix on mechanical properties these material was examined and the functions of correlations between values were obtained. The conclusion gives the analysis and the interpretation of the obtained results.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 31-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface casting defects inspection using vision system and neural network techniques
    Autorzy:
    Świłło, S. J.
    Perzyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380699.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nondestructive testing
    machined aluminum die castings
    image processing algorithms
    vision system inspection
    neural network
    badanie nieniszczące
    odlewnictwo ciśnieniowe
    algorytm przetwarzania obrazu
    inspekcja wizyjna
    sieć neuronowa
    Opis:
    The paper presents a vision based approach and neural network techniques in surface defects inspection and categorization. Depending on part design and processing techniques, castings may develop surface discontinuities such as cracks and pores that greatly influence the material’s properties Since the human visual inspection for the surface is slow and expensive, a computer vision system is an alternative solution for the online inspection. The authors present the developed vision system uses an advanced image processing algorithm based on modified Laplacian of Gaussian edge detection method and advanced lighting system. The defect inspection algorithm consists of several parameters that allow the user to specify the sensitivity level at which he can accept the defects in the casting. In addition to the developed image processing algorithm and vision system apparatus, an advanced learning process has been developed, based on neural network techniques. Finally, as an example three groups of defects were investigated demonstrates automatic selection and categorization of the measured defects, such as blowholes, shrinkage porosity and shrinkage cavity.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 103-106
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Causes of Cracks in a Thick-Walled Bush Made of Die-Cast Aluminum Bronze
    Autorzy:
    Pisarek, B. P.
    Kołakowski, D.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381784.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    MAGMA5
    die casting
    complex aluminium bronze
    hot tear
    cold crack
    technologia informatyczna
    przemysł odlewniczy
    odlewnictwo ciśnieniowe
    brąz aluminiowy
    pęknięcie zimne
    Opis:
    For the die casting conditions of aluminium bronzes assumed based on the literature data, a thick-walled bush was cast, made of complex aluminium bronze (Cu-Al-Fe-Ni-Cr). After the cast was removed from the mould, cracks were observed inside it. In order to identify the stage in the technological production process at which, potentially, the formation of stresses damaging the continuity of the microstructure created in the cast was possible (hot cracking and/or cold cracking), a computer simulation was performed. The article presents the results of the computer simulation of the process of casting the material into the gravity die as well as solidifying and cooling of the cast in the shape of a thick-walled bush. The simulation was performed with the use of the MAGMA5 program and by application of the CuAl10Ni5,5Fe4,5 alloy from the MAGMA5 program database. The results were compared with the location of the defects identified in the actual cast. As a result of the simulation of the die-casting process of this bush, potential regions were identified where significant principal stresses accumulate, which can cause local hot and cold cracking. Until now, no research has been made of die-cast aluminium bronzes with a Cr addition. Correlating the results of the computer simulation validated by the analysis of the actual cast made it possible to clearly determine the critical regions in the cast exposed to cracking and point to the causes of its occurrence. Proposals of changes in the bush die casting process were elaborated, in order to avoid hot tearing and cold cracking. The article discusses the results of preliminary tests being a prologue to the optimization of the die-casting process parameters of complex aluminium bronze thick-walled bushs.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 119-124
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Cr and W on the Crystallization Process, the Microstructure and Properties of Hypoeutectic Silumin to Pressure Die Casting
    Autorzy:
    Szymczak, T.
    Gumienny, G.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381777.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theory of crystallization
    innovative foundry
    innovative foundry materials
    pressure die casting
    multicomponent silumin
    DTA method
    teoria krystalizacji
    innowacyjna odlewnia
    innowacyjne materiały odlewnicze
    odlewnictwo ciśnieniowe
    siluminy
    metoda DTA
    Opis:
    This article presents the results of studies in the hypoeutectic silumin destined for pressure die casting with the simultaneous addition of chromium and tungsten. The study involved the derivative and thermal analysis of the crystallization process, metallographic analysis and mechanical properties testing. Silumin 226 grade was destined for studies. It is a typical silumin to pressure die casting. AlCr15 and AlW8 preliminary alloys were added to silumin. Its quantity allowed to obtain 0.1, 0.2, 0.3 and 0.4% of Cr and W in the tested alloy. Studies of the crystallization process as well as the microstructure of the silumin poured into DTA sampler allowed to state the presence of additional phase containing 0.2% or more Cr and W. It has not occurred in silumin without the addition of above mentioned elements. It is probably the intermetallic phase containing Cr and W. DTA studies have shown this phase crystallizes at a higher temperature range than α (Al) solid solution. In the microstructure of each pressure die casting containing Cr and W the new phases formed. Mechanical properties tests have shown Cr and W additives in silumin in an appropriate amount may increase its tensile strength Rm (about 11%), the yield strength Rp0.2 (about 21%) and to a small extent elongation A.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 109-114
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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