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    Wyświetlanie 1-12 z 12
    Tytuł:
    Effect of Process Parameters on Exudation Thickness in Continuous Unidirectional Solidification Tin Bronze Alloy
    Autorzy:
    Jihui, Luo
    Fang, He
    Powiązania:
    https://bibliotekanauki.pl/articles/382552.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    unidirectional solidification
    Tin bronze alloy
    orthogonal experiment
    exudation
    krzepnięcie jednokierunkowe
    stop cynowo-brązowy
    eksperyment ortogonalny
    wysięki
    Opis:
    The exudation layer seriously affects the properties and the surface finish of the tin bronze alloy. The effective control of the exudation thickness is important measure for improving the properties of the alloy. In order to study the influence of process parameters on the thickness of exudate layer, the tin bronze alloy was prepared by continuous unidirectional solidification technology at different process parameters. The microstructure of the continuous unidirectional solidification tin bronze alloy was analyzed. The effect of process parameters on microstructure and chemical compositions was studied by orthogonal experiment. The results show that there exists an exudation layer on the surface of the continuous unidirectional solidification tin bronze alloy, and the exudation is mainly composed of a tin-rich precipitated phase. It indicates that the continuous casting speed is the main factor affecting the thickness of exudation layer, followed by mold temperature, melt temperature, cooling water temperature and cooling distance.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 97-100
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of two-stage isothermal annealing on microstructure CuAl10Fe5Ni5 bronze with additions of Si, Cr, Mo, W and C
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380284.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    technological properties
    bronze alloy
    TTT curve
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości technologiczne
    stop brązu
    Opis:
    The aim of this study was to investigate the effect of a two-step isothermal annealing respectively at 1000 ˚C for 30 min, then at the range of 900÷450 ˚C increments 50 ˚C on the microstructure CuAl10 Ni5Fe5 bronze with additions of Si, Cr, Mo, W and C, cast into sand moulds. The study concerned the newly developed species, bronze, aluminium-iron-nickel with additions of Si, Cr, Mo, W and C. In order to determine the time and temperature for the characteristic of phase transitions that occur during heat treatment of the test method was used thermal and derivation analysis (TDA). The study was conducted on cylindrical test castings cast in the mould of moulding sand. It was affirmed that one the method TDA can appoint characteristic for phase transformations points about co-ordinates: τ (s), t (˚C), and to plot out curves TTT for the studied bronze with their use. It was also found that there is a five isothermal annealing temperature ranges significantly altering the microstructure of examined bronze.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 187-194
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obtaining and Analysis of a New Aluminium Bronze Material Using Induction Furnace
    Autorzy:
    Chelariu, Romeo Gabriel
    Cimpoeșu, Nicanor
    Birnoveanu, Teodora Irina
    Istrate, Bogdan
    Baciu, Constantin
    Bejinariu, Costica
    Powiązania:
    https://bibliotekanauki.pl/articles/2174552.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum bronze
    non-sparking alloy
    SEM
    EDS
    Tafel
    Opis:
    Copper-based alloys with the addition of Al present excellent properties and can be considered a proper choice for applications as contact materials based on their good strength and fret resistance. Cu-Al alloys are used in different systems parts as bearings, gears and worm gears. The intention is to replace steel materials with new copper-based materials for parts that work in a possible explosive environment to reduce the possibility of spark appearance. Copper-berilyum alloys are known as non-sparking alloys and are used in different tools obtaining for environments with possible explosive gaseous. Results from the obtaining and analysis of a new alloy based on CuAlBe are given. The material was melted in a vacuum induction furnace from CuBe master alloy and high purity aluminium and cast into a metallic die. The alloys obtained were analyzed using EDS - energy dispersive spectroscopy for chemical composition, OM-optical and SEM-electronic microscopy for the microstructure, and the electro-corrosion resistance was tested using linear Tafel diagram and cyclic potentiometry.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1251--1257
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use-wear analysis of copper-alloy artifacts. A window of opportunity or a dead end?
    Analiza traseologiczna artefaktów ze stopów miedzi. Okazja do badań czy ślepy zaułek?
    Autorzy:
    Kasprowicz, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/27312742.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Use-wear
    traceology
    copper-alloy
    bronze
    theory
    method
    Opis:
    A world seen through the lenses of a microscope can lead to exceptional discoveries. Regarding archaeology, it can grant us knowledge about the possible usage of certain artifacts in the past. Previously unrecognized and unclassified fragments of flint and bone can be reinterpreted as a completely different item. Throughout the years there were a small few astounding scientist who laid foundations and improved on this part of archaeology. In this already tight-knit group of researchers there is an even smaller group of people who are interested in applying use-wear analysis to copper-alloy artifacts. It is quite a different approach. You still look for signs of usage or any other traces but the difference in material and overall structure of an artifact makes for quite a difficult task. The multiple issues and setbacks such as corrosion, acidity of the soil, the composition of alloys, conservation or simple mismanagement of an artifact can lead to a lot of misleading conclusions. Despite all those problem you can still gather data from use-wear analysis on metal. But can it be used in forming any sort of narrative or is just a “collection of pretty pictures”?
    Źródło:
    Folia Praehistorica Posnaniensia; 2022, 27; 73-85
    0239-8524
    2450-5846
    Pojawia się w:
    Folia Praehistorica Posnaniensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Researches on friction force between valve made of tial and its guide made of phosphorous bronze
    Autorzy:
    Siczek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/243568.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    valvetrain
    lightweight valve
    friction force
    TiAl alloy
    phosphorous bronze
    Opis:
    A lightweight valve can be one made of steel but with a drilled stem. Another one can be made of TiAl alloys and its stem can be full or drilled. Lightweight valve can be also ceramic one made of Si3N4. Such valves can mate with guides made of cast iron or of phosphorous bronze in varying conditions in their common contact zone. The aim of researches has been to measure friction force in contact zone between valve stem made of TiAl alloy and its guide made of phosphorous bronze, in the absence of oil. The conditions of room temperature and of the atmosphere pressure have been used during experiment. Mentioned researches have been provided in tester, which design has been presented in the article. The loading of contact zone has varied periodically during serie. The displacement and acceleration of valve and the force during its impact into seat insert have been measured during tests. Additionally the sound level has been measured, either. Tests have been provided for different frequency of driving force. Obtained results of researches has been shown in the article. In all cases the measured sound level have been equal 94 dBA, when sound level of laboratory environment has been equal 40 dBA. Values for coefficient of friction between valve stem and its guide can change from 0.12 to 0.16 and decrease almost linearly with increasing of loading frequency. Values of dry friction coefficient between valve stem made of TiAl alloy and coated by chrome and its guide made of phosphorous bronze can be smaller up to 17% than values obtained in case of valve stem coated by nc-WC/a-C:H mating with a guide made of cast iron.
    Źródło:
    Journal of KONES; 2013, 20, 1; 295-301
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Iron in AlSi10MgMn Alloy
    Autorzy:
    Žihalová, M.
    Bolibruchová, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382235.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloy AlSi10MgMn
    intermetallic phase
    bronze
    stop AlSi10MgMn
    faza międzymetaliczna
    brąz
    Opis:
    Presence of iron in Al-Si cast alloys is common problem mainly in secondary (recycled) aluminium alloys. Better understanding of iron influence in this kind of alloys can lead to reduction of final castings cost. Presented article deals with examination of detrimental iron effect in AlSi10MgMn cast alloy. Microstructural analysis and ultimate tensile strength testing were used to consider influence of iron to microstructure and mechanical properties of selected alloy.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 109-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of exploitive characteristics BA1032 alloy after TIG welding method treatment
    Ocena właściwości eksploatacyjnych stopu BA1032 po obróbce spawalniczą metodą TIG
    Autorzy:
    Lipiński, T.
    Cudakiewicz, M.
    Wach, A.
    Mikołajczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/329172.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    stop Cu
    spawanie
    właściwości użytkowe
    brąz aluminiowy
    Cu alloy
    welding
    using properties
    aluminium bronze
    Opis:
    The aim of this study was to make the diagnosis of the operating conditions of aluminium bronze BA 1032. Current intensity was selected on an experimental way to assure of stable melting of the surface layer together with inserted components at small current intensity. The examined questions were: the influence of surface treatment of aluminium alloy onto structure by collected energy source; the geometric parameters of the surface melted by TIG welding method of bronze surface plated alloy ingredients by using different current parameters. The results of this study indicate that the thermic exposure value, it means: the sort of concentrated energy source as well as its speed, as well as the sort of alloy additives have an influence on exploitation parameters of tested samples.
    Celem pracy była diagnostyka właściwości eksploatacyjnych brązu aluminiowego BA1032. Próbki do badań pobierano z obszaru ustabilizowanego oddziaływaniem skupionego źródła ciepła (stała, ustabilizowana szerokość strefy wpływu ciepła). Natężenie prądu dobrano eksperymentalnie zapewniając stabilne przetopienie warstwy powierzchniowej wraz z wprowadzanymi składnikami przy realnie małym jego natężeniu. Z analizy wyników badań wynika, że zarówno wartość ekspozycji cieplnej, tj. rodzaj zastosowanej energii źródła skupionego ciepła, prędkość jego przemieszczania jak i rodzaj dodatków stopowych wpływają na parametry eksploatacyjne obrobionych elementów.
    Źródło:
    Diagnostyka; 2008, 4(48); 119-122
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer Advisory System in the Domain of Cooper Alloys Manufacturing
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Rojek, G.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/383285.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper alloy
    bronze
    modification
    quenching
    tempering
    cased based reasoning
    stop miedzi
    brąz
    modyfikacja
    hartowanie
    odpuszczanie
    Opis:
    The main scope of the article is the development of a computer system, which should give advices at problem of cooper alloys manufacturing. This problem relates with choosing of an appropriate type of bronze (e.g. the BA 1044 bronze) with possible modification (e.g. calcium carbide modifications: Ca + C or CaC2) and possible heat treatment operations (quenching, tempering) in order to obtain desired mechanical properties of manufactured material described by tensile strength - Rm, yield strength - Rp0.2 and elongation - A5. By construction of the computer system being the goal of presented here work Case-based Reasoning is proposed to be used. Case-based Reasoning is the methodology within Artificial Intelligence techniques, which enables solving new problems basing on experiences that are solutions obtained in the past. Case-based Reasoning also enables incremental learning, because every new experience is retained each time in order to be available for future processes of problem solving. Proposed by the developed system solution can be used by a technologist as a rough solution for cooper alloys manufacturing problem, which requires further tests in order to confirm it correctness.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 77-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Impact of Nickel Additions on Tin Bronzes
    Autorzy:
    Kozana, J.
    Garbacz-Klempka, A.
    Piękoś, M.
    Czekaj, J.
    Perek-Nowak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382525.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    tin bronze
    microstructure
    alloy additives
    Cu–Sn–Ni alloy
    stopy odporne na zużycie
    brąz cynowy
    mikrostruktura
    dodatki stopowe
    stop Cu-Sn-Ni
    Opis:
    High prices of tin and its limited resources, as well as several valuable properties characterising Cu-Sn alloys, cause searching for materials of similar or better properties at lower production costs. The influence of various nickel additions to CuSn10 casting bronze and to CuSn8 bronze of a decreased tin content was tested. Investigations comprised melting processes and casting of tin bronzes containing various nickel additions (up to 5%). The applied variable conditions of solidification and cooling of castings (metal and ceramic moulds) allowed to assess these alloys sensitivity in forming macro and microstructures. In order to determine the direction of changes in the analysed Cu-Sn-Ni alloys, the metallographic and strength tests were performed. In addition, the solidification character was analysed on the basis of the thermal analysis tests. The obtained results indicated the influence of nickel in the solidification and cooling ways of the analysed alloys (significantly increased temperatures of the solidification beginning along with increased nickel fractions in Cu-Sn alloys) as well as in the microstructure pattern (clearly visible grain size changes). The hardness and tensile strength values were also changed. It was found, that decreasing of the tin content in the analysed bronzes to which approximately 3% of nickel was added, was possible, while maintaining the same ultimate tensile strength (UTS) and hardness (HB) and improved plasticity (A5).
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 53-60
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Ecological Cast Bronzes for Fittings Manufactured from Recycled Waste
    Autorzy:
    Malec, Witold
    Cwolek, Beata
    Brudny, Anna
    Juszczyk, Barbara
    Kulasa, Joanna
    Hury, Anna
    Marek, W.
    Stolorz, K.
    Wróbel, D.
    Filipowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/27314124.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    wastes
    recycling
    continuous casting
    machining bronze
    lead-free copper alloy
    odpady
    recykling
    odlewanie ciągłe
    obróbka brązu
    bezołowiowy stop miedzi
    Opis:
    The article presents tests on a new lead-free bronze CuSn4Zn2PS, intended for fittings for contact with drinking water, in which the addition of lead was replaced with sulphur. The subject of the experimental work was the production of semi-finished products from this alloy based on the charge coming entirely from waste generated after machining. A specialized pilot line was used for the tests, and after cleaning, the waste was melted and then were continuously cast in the form of rods and hollow rods. The cleaning efficiency was assessed, and the manufactured semi-finished products were subjected to tests, including the assessment of the chemical and mechanical homogeneity and the structure of the test batch of the semi-finished casting products in terms of the possibility of manufacturing products meeting the requirements of technical specifications. The obtained results, both in terms of a stable chemical composition, homogeneous and reproducible mechanical properties, fully compliant with the specifications for fittings bronzes (CC499K), as well as the lack of faults of the obtained semi-finished products, despite a very large share of waste material, indicate the possibility of using the tested recycling method for the production of semi-products of sulphur bronze, which is an alloy that is relatively difficult to manufacture.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 1; 37--42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence CuAl10Fe3Mn2 Additive on Ultimate Tensile Strength and WEAR of Al-9%SiMg Alloy
    Wpływ dodatku CuAl10Fe3Mn2 na wytrzymałość na rozciąganie i zużycie ścierne stopu Al-9%SiMg
    Autorzy:
    Lipiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/188637.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    silumin
    aluminum bronze
    Al-Si alloy
    ultimate tensile strength
    wear
    brąz aluminiowy
    stop Al-Si
    wytrzymałość na rozciąganie
    zużycie ścierne
    Opis:
    One of the most common castings applied in industrial production is aluminium-silicon alloy (ca. 9% Si with Mg). The Al-SiMg alloys have high corrosion resistance, high strength to weight ratio with modifications, very good castability, a low thermal-expansion coefficient, and relatively good wear resistance. These properties make it possible to widely apply the foundry Al-9% SiMg alloy to number of aviation, automotive, and others materials working on tribological applications. Similar to silumins, the aluminium bronze CuAl10Fe3Mn2 is characterized by good mechanical properties and wear and corrosion resistance. This paper presents the research on the treatment of Al-9%SiMg alloy with a composition of CuAl10Fe3Mn2 in different mass ranges. The experiments were conducted by a factor plan 23 for three independent variables. The main additions were strontium, Al-9%SiMg, aluminium bronze, as well as pure or melted with raw silumin. The effect of the tested additions on the microstructure and tensile strength of the Al-9%SiMg alloy was presented in figures. All analysed parameters (mechanical and tribological) of the hypo-eutectic Al-9%SiMg alloy with tested bronze additions are improved. Based on the analysis of the study results, it was found that the microstructure and tensile strength of the tested alloy are determined through the contents introduced of CuAl10Fe3Mn2 to the alloy.
    Jednym z najczęściej stosowanych w produkcji przemysłowej stopów odlewniczych jest stop aluminium--krzem (ok. 9% Si z dodatkiem Mg). Stopy Al-SiMg charakteryzują się wysoką odpornością na korozję, w stanie zmodyfikowanym wysokim stosunkiem wytrzymałości do wagi odlewu, bardzo dobrą lejnością, niskim współczynnikiem rozszerzalności cieplnej, względnie dobrą odpornością na zużycie. Te właściwości umożliwiają szerokie zastosowanie odlewniczego stopu Al-9% SiMg do wielu materiałów lotniczych, motoryzacyjnych i innych pracujących również w zastosowaniach tribologicznych. Podobnie jak w przypadku siluminu brąz aluminiowy CuAl10Fe3Mn2 charakteryzuje się dobrymi właściwościami mechanicznymi, zużyciem i odpornością na korozję. W artykule przedstawiono badania dotyczące obróbki stopu Al-9% SiMg składnikiem CuAl10Fe3Mn2 w różnych zakresach masowych. Eksperymenty przeprowadzono za pomocą planu czynnikowego 23 dla trzech niezależnych zmiennych. Głównym dodatkiem były: stront Al-9%SiMg, brąz aluminiowy, zarówno czysty, jak i stopiony z surowym siluminem. Wpływ badanych dodatków na mikrostrukturę i wytrzymałość na rozciąganie stopu Al-9% SiMg przedstawiono na rysunkach. Wszystkie analizowane parametry (mechaniczne i tribologiczne) stopu podeutektycznego Al-9% SiMg z badanym dodatkiem brązu zostały poprawione. Na podstawie analizy wyników badań stwierdzono, że mikrostruktura i właściwości mechaniczne badanego stopu są określone przez zawartość CuAl10Fe3Mn2 wprowadzoną do stopu.
    Źródło:
    Tribologia; 2018, 279, 3; 83-89
    0208-7774
    Pojawia się w:
    Tribologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mediaeval Casts of the Eastern Reliquary Crosses
    Autorzy:
    Garbacz-Klempka, A.
    Nosek, E. M.
    Rzadkosz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381176.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nondestructive testing method
    artistic casting
    metal artefacts conservation
    copper alloy
    bronze
    badanie nieniszczące
    odlewnictwo artystyczne
    konserwacja metalu
    stop miedzi
    brąz
    Opis:
    Non-destructive testing methods are widely applied for metal artefacts research. The analyses presented here are part of research and conservation program encompassing metal artefacts discovered during archaeological excavations in the years 2010–2011 in the area of Czermno. Among metal artefacts of archaeological origin there is an important group of objects connected with cult. Reliquary crosses called encolpions can be distinguished here; worn both by priests and by lay people in Central and Eastern Europe. They present an interesting group for historical and iconographic research, as well as for the analyses of the materials and the techniques applied. The type of cast encolpions were examined, found in the area of the old dwelling complex connected with fortified settlement of Czermno (the old Grody Czerwieńskie). These objects are initially dated to the 12th century. These metal artefacts are researched, by application of the non-destructive testing methods, at the Faculty of Foundry Engineering of the AGH University of Science and Technology in Kraków in cooperation with Maria Curie-Skłodowska University in Lublin, the Polish Academy of Sciences and the Rzeszów University. The research helped to enlarge the scientific scope of knowledge on Mediaeval materials and manufacturing techniques, while the conservation efforts gave back the proper artistic value to the artefacts from Czermno and allowed for the appropriate exhibition.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 147-152
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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