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    Wyświetlanie 1-10 z 10
    Tytuł:
    Reliability evaluation in the production process of aluminum castings
    Autorzy:
    Jankajova, E.
    Kotus, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/111875.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    production process
    die casting
    aluminium castings
    proces produkcji
    odlewanie ciśnieniowe
    odlewy aluminiowe
    Opis:
    This article deals with reliability evaluation of the production process for die casting. Reliability of the production process was assessed on the basis of productivity and deformity. With suitably chosen production technology the increasing of labour productivity can be achieved alongside the required quality of aluminum castings.
    Źródło:
    Production Engineering Archives; 2015, 6, 1; 49-51
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The assessment of castings quality using selected quantitative methods
    Autorzy:
    Kucharikova, L.
    Tillova, E.
    Zavodska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/111949.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminium castings
    image analyser software
    quantitative analysis
    structural parameters of aluminium cast alloys
    odlew aluminiowy
    oprogramowanie analizatora obrazu
    analiza ilościowa
    parametry strukturalne
    odlewane stopy aluminium
    Opis:
    Aluminium alloys represent an important category of materials due to their high technological value and wide range of applications. The alloys of the Al-Si-Cu system have become increasingly important in recent years, mainly in automotive industry that uses secondary aluminium (recycled) in the form of various motor mounts, pistons, cylinder heads, heat exchangers, air conditioners due to their high strength at room and high temperature. This work deals with possibilities of quick and correct assessment of aluminium castings microstructure, especially focused on volume, size and shape of structural parameters – eutectic Si and intermetallic phases different chemical compositions. These structural parameters affect the properties of castings and it is important to study their features. The features were studied by using image analyser software NIS Elements.
    Źródło:
    Production Engineering Archives; 2016, 13, 4; 7-10
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microscopic Analysis of the Aluminium Castings Produced with the use of Polymer Composite Patterns
    Autorzy:
    Czarnecka-Komorowska, Dorota
    Gawdzińska, Katarzyna
    Popielarski, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2174630.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium castings
    lost wax method
    bentonite
    microscopic analysis
    polymer composites
    odlewy aluminiowe
    metoda wosku traconego
    bentonit
    analiza mikroskopowa
    kompozyty polimerowe
    Opis:
    The paper presents a microscopic analysis of the surface and fracture of aluminium castings produced using the lost-wax method for patterns made of a composite material, i.e. polyethylene with the addition of bentonite. Castings are made of AlSi7 aluminium alloy (silumin) in a plaster mould. A new type of polymer waxes enriched with bentonite was used to obtain new composites, minimizing the defects caused by the casting production process. The castings were made in the centrifugal casting process. The prepared plaster moulds were removed from the furnace and poured with liquid aluminium alloy (AlSi7) at 750°C. The surface and fracture of the castings was analysed using an optical digital microscope type VHX-7000 manufactured by KEYENCE. It has been proven that the studied castings feature surface defects (raw surface defects) in the form of high roughness and the presence of bentonite inclusions classified as casting contamination. During the tests, shape defects related to mechanical damage were also.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 3; 113--117
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Heat Treatment on Abrasive Wear Resistance of Silumin Matrix Composite Castings
    Autorzy:
    Gawdzińska, K.
    Bryll, K.
    Nagolska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/352168.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metal composite castings
    thermal treatment
    tribology
    aluminium alloy
    Opis:
    The authors attempted at examining the effect of heat treatment on abrasive wear resistance of metal composite castings. Metal matrix composites were made by infiltrating preforms created from unordered short fibers (graphite or silumin) with liquid aluminium alloy AlSi12(b). Thus prepared composites were subject to solution heat treatment at a temperature of 520°C for four hours, then aging at a temperature of 220°C for four hours. Abrasion resistance of the material was tested before and after thermal treatment.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 177-182
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a technology for the production of ceramic moulds with reduced thermal conductivity to control the solidification of thin-walled castings
    Autorzy:
    Leśniewski, W.
    Wawrylak, M.
    Wieliczko, P.
    Gil, A.
    Małysza, M.
    Szczepaniak-Lalewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/391626.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    ceramic moulds
    aluminium alloys
    thermal conductivity
    thin-walled castings
    microspheres
    Opis:
    During the project a technology of making ceramic moulds using aluminosilicate microspheres was developed. According to the developed technology, ceramic samples were used to determine thermal conductivity in the temperature range of 500°C to 850°C. In this temperature range, thermal conductivity is about 0.5 W/mK. Strength measurements were conducted using a four-point bending technique. The strength of the developed ceramics and typical ceramics made from molochite materials is similar. Computer simulations facilitated the design of experimental moulds. The recording of Al alloy cooling curves in rectangular insulated and non-insulated moulds allowed for comparison of the thermal parameters of both types of moulds (i.e. ceramics). There was also a castability test performed using the moulds with a “grille” model with 1.5 × 1.5 mm channels, which determined the effect of increased material insulation on the number of properly filled mesh of the mould.
    Źródło:
    Prace Instytutu Odlewnictwa; 2017, 57, 4; 259-263
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas Blowing Ultrasonic Aluminium Degassing Assessment with the Reduced Pressure Test (RPT) Method
    Autorzy:
    Galarraga, H.
    de Cortazar, M. G.
    Arregi, E.
    Artola, A.
    Oncala, J. L.
    Merchan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/946877.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium alloys
    porosity in castings
    degassing
    ultrasonic
    RPT method
    stopy aluminium
    porowatość odlewów
    odgazowanie
    ultradźwięki
    Opis:
    Entrapped gases, solidification shrinkage and non-metallic compound formation are main sources of porosity in aluminium alloy castings. Porosity is detrimental to the mechanical properties of these castings; therefore, its reduction is pursued. Rotary degassing is the method mostly employed in industry to remove dissolved gases from aluminium melts, reducing porosity formation during solidification of the cast part. Recently, ultrasonic degassing has emerged as a promising alternative thanks to a lower dross formation and higher energy efficiency. This work aims to evaluate the efficiency of the ultrasonic degasser and compare it to a conventional rotary degassing technique applied to an AlSi10Mg alloy. Degassing efficiency was evaluated employing the reduced pressure test (RPT), where samples solidified under reduced pressure conditions are analysed. Factors affecting RPT were considered and temperature parameters for the test were established. The influence of ultrasonic degassing process parameters, such as degassing treatment duration and purging gas flow rate were studied, as well as treated aluminium volume and oxide content. Finally, ultrasonic degassing process was contrasted to a conventional rotary degassing technique, comparing their efficiency.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 2; 111-117
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Vacuum Assistance on the Quality of Castings Produced by High Pressure Die Casting Method
    Autorzy:
    Łągiewka, M.
    Konopka, Z.
    Nadolski, M.
    Zyska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380704.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    aluminium alloys
    quality of castings
    surface roughness
    defects in pressure die castings
    innowacyjne technologie odlewnicze
    stopy aluminium
    jakość odlewów
    chropowatość powierzchni
    defekty
    Opis:
    The presented work is aimed to deal with the influence of changes in the value of negative (relative) pressure maintained in the die cavity of pressure die casting machine on the surface quality of pressure castings. The examinations were held by means of the modified Vertacast pressure die casting machine equipped with a vacuum system. Castings were produced for the parameters selected on the basis of previous experiments, i.e. for the plunger velocity in the second stage of injection at the level of 4 m/s, the pouring temperature of the alloy equal to 640°C, and the die temperature of 150°C. The examinations were carried on for three selected values of negative gauge pressure: - 0.03, - 0.05, and - 0.07 MPa. The quality of casting was evaluated by comparing the results of the surface roughness measurements performed for randomly selected castings. The surface roughness was measured by means of Hommel Tester T1000. After a series of measurements it was found that the smoothest surface is exhibited by castings produced at negative gauge pressure value of - 0.07 MPa.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 23-26
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Comparative Analysis of the Inclusion Removal Efficiency of Different Fluxes
    Autorzy:
    Máté, M.
    Tokár, M.
    Fegyverneki, G.
    Gyarmati, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/946873.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    castings defects
    aluminum alloy
    inclusions
    cleaning flux
    melt treatment
    wady odlewów
    stop aluminium
    wtrącenia
    Opis:
    The Comparative Analysis of the Inclusion Removal Efficiency of Different Fluxes
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 2; 53-58
    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:
    Quality of automotive sand casting with different wall thickness from progressive secondary alloy
    Autorzy:
    Pastierovičová, Lucia
    Kuchariková, Lenka
    Tillová, Eva
    Chalupová, Mária
    Pastirčák, Richard
    Powiązania:
    https://bibliotekanauki.pl/articles/26078793.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    jakość odlewów
    wtórny stop aluminium
    grubość ściany
    analiza ilościowa
    wyższa zawartość Fe
    quality of castings
    secondary aluminium alloy
    wall thickness
    quantitative analysis
    higher Fe content
    Opis:
    This paperwork is focused on the quality of AlSi6Cu4 casting with different wall thicknesses cast into the metal mold. Investigated are structural changes (the morphology, size, and distribution of structural components). The quantitative analysis is used to numerically evaluate the size and area fraction of structural parameters (α-phase, eutectic Si, intermetallic phases) between delivered experimental material and cast with different wall thicknesses. Additionally, the Brinell hardness is performed to obtain the mechanical property benefits of the thin-walled alloys. This research leads to the conclusion, that the AlSi6Cu4 alloy from metal mold has finer structural components, especially in small wall thicknesses, and thus has better mechanical properties (Brinell hardness). These secondary Al-castings have a high potential for use in the automotive industry, due to the thin thicknesses and thus lightweight of the construction.
    Źródło:
    Production Engineering Archives; 2022, 28, 2; 172--177
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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