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    Wyświetlanie 1-12 z 12
    Tytuł:
    Effect of Heat Treatment Parameters on the Toughness of Unalloyed Ausferritic Ductile Iron
    Autorzy:
    Guzik, E.
    Sokolnicki, M.
    Nowak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382323.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile cast iron
    heat treatment
    ADI
    toughness
    mechanical properties
    ausferrite
    żeliwo sferoidalne
    obróbka cieplna
    wytrzymałość
    właściwości mechaniczne
    Opis:
    Studies were carried out to determine the effect of heat treatment parameters on the plastic properties of unalloyed ausferritic ductile iron, such as the elongation and toughness at ambient temperature and at – 60°C. The effect of austenitizing temperature (850, 900 and 950°C) and ausferritizing time (5 - 180 min.) at a temperature of 360°C was also discussed. The next step covered investigations of a relationship that is believed to exist between the temperature (270, 300, 330, 360 and 390°C) and time (5, 10, 30, 60, 90, 120, 150, 180, 240 min.) of the austempering treatment and the mechanical properties of unalloyed ausferritic ductile iron, when the austenitizing temperature is 950°C. The “process window” was calculated for the ADI characterized by high toughness corresponding to the EN-GJS-800-10-RT and EN-GJS-900-8 grades according to EN-PN 1564 and to other high-strength grades included in this standard. Low-alloyed cast iron with the nodular graphite is an excellent starting material for the technological design of all the ausferritic ductile iron grades included in the PN-EN-1624 standard. The examined cast iron is characterized by high mechanical properties stable within the entire range of heat treatment parameters.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 79-84
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highsilicone Austempered Ductile Iron
    Autorzy:
    Kochański, A.
    Krzyńska, A.
    Radziszewski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382613.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    silicone content
    matrix structure
    ultimate tensile strength
    żeliwo sferoidalne
    właściwości mechaniczne
    wytrzymałość na rozciąganie
    Opis:
    Ductile iron casts with a higher silicone content were produced. The austempering process of high silicone ductile iron involving different austempering times was studied and the results presented. The results of metallographical observations and tensile strength tests were offered. The obtained results point to the fact that the silicone content which is considered as acceptable in the literature may in fact be exceeded. The issue is viewed as requiring further research.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Inoculants on the Structure and Properties of Thin-Walled Ductile Iron Castings
    Autorzy:
    Roučka, Jaromir
    Kaňa, Václav
    Kryštůfek, T.
    Chýlková, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11236769.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    thin-wall castings
    ductile iron
    inoculation
    structure
    mechanical properties
    odlewy cienkościenne
    żeliwo sferoidalne
    wszczepienia
    struktura
    właściwości mechaniczne
    Opis:
    In many application fields, thin-walled ductile iron castings can compete with castings made from aluminium alloys thanks as their show superior mechanical properties higher stiffness, vibrations damping as well as properties at higher temperatures. As problematic criterion in thin-walled cast-iron castings can be seen the graphitization ability and high sensitivity of the structure and the mechanical properties to the solidification rate. The tests were curried on plate castings with wall thicknesses of 3, 5, and 8 mm, using inoculants based on FeSi70 with different contents of nucleation-active elements as aluminium, calcium, zirconium and magnesium. The inoculation was made by the in-mould method. In the experiments structures were achieved, differing by the graphite dispersity, structure and mechanical properties. The experiments have proved particularly a high sensitivity of the structure and the mechanical properties to the cooling rate of the sample castings. The influence of the inoculant type is less important than the influence of solidification rate.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 90--95
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corrosion resistance of SiMo- and SiCu-types of nodular cast iron in NaCl solution
    Autorzy:
    Vaško, Alan
    Zatkalíková, Viera
    Kaňa, Václav
    Powiązania:
    https://bibliotekanauki.pl/articles/88510.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    nodular cast iron
    corrosion
    exposure immersion test
    NaCl solution
    żeliwo sferoidalne
    korozja
    roztwór NaCl
    właściwości mechaniczne
    właściwości zmęczeniowe
    Opis:
    Nodular cast irons are used in a wide range of industrial applications, especially in the automotive industry. SiMo-type of nodular cast iron is suitable for high-temperature applications, for example the exhaust manifolds of the combustion engines; SiCu-type of nodular cast iron is used in various components of tribotechnical units. These automotive components often work in a corrosive environment. Therefore, the aim of this paper is to compare the corrosion resistance of two types of the nodular cast irons (SiMo-type and SiCu-type). Corrosion resistance was determined by the exposure immersion test at ambient temperature. Specimens of both types of nodular cast iron were immersed in 3.5 % NaCl solution (to simulate sea water) and gradually removed from the solution after 1, 2, 4 and 8 weeks. Subsequently, the weight loss (g) and the average corrosion rate (g m-2 day-1) were calculated. Experimental results show that nodular cast iron alloyed by Si and Mo has higher corrosion resistance than the nodular cast iron alloyed with Si and Cu. Moreover, the mechanical properties (evaluated by tensile test, impact bending test and hardness test) and fatigue properties of both types of nodular cast iron has been compared in the paper.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2020, 2, 1; 191-198
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ADI after austenitising from intercritical temperature
    Autorzy:
    Kowalski, A.
    Kluska-Nawarecka, S.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/379994.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile cast iron
    austempering
    microstructure
    mechanical properties
    fuzzy logic
    żeliwo sferoidalne
    hartowanie izotermiczne
    mikrostruktura
    właściwości mechaniczne
    logika rozmyta
    Opis:
    ADI subjected to austenitising at intercritical temperatures contains in its matrix the precipitates of pre-eutectoid ferrite. Studies were carried out on the ductile iron of the following chemical composition: C = 3,80%, Si = 2,30%, Mn = 0,28%, P = 0,060%, S = 0,010%, Mg = 0,065%, Ni = 0,60%, Cu = 0,70%, Mo = 0,21%. This cast iron was austenitised at three different temperatures, i.e. 800, 815 and 830ºC and austempered at 360 and 380ºC. For each variant of the cast iron heat treatment, the mechanical properties, i.e. YS, TS, EL and Hardness, were measured, and structure of the matrix was examined. Higher plastic properties were obtained owing to the presence of certain amount of pre-eutectoid ferrite. The properties were visualised using fuzzy logic model in a MATLAB. software.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1; 81-88
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of Selected Mechanical Properties in Austempered Ductile Iron with Different Wall Thickness by the Decision Support Systems
    Autorzy:
    Jaśkowiec, Krzysztof
    Opaliński, Andrzej
    Kustra, Piotr
    Jach, D.
    Wilk-Kołodziejczyk, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/27314159.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    ADI
    austempered ductile iron
    mechanical properties
    prediction
    decision support systems
    decision tree
    żeliwo sferoidalne
    właściwości mechaniczne
    prognozowanie
    systemy wspomagania decyzji
    Opis:
    The structure of Austempered Ductile Iron (ADI) is depend of many factors at individual stages of casting production. There is a rich literature documenting research on the relationship between heat treatment and the resulting microstructure of cast alloy. A significant amount of research is conducted towards the use of IT tools for indications production parameters for thin-walled castings, allowing for the selection of selected process parameters in order to obtain the expected properties. At the same time, the selection of these parameters should make it possible to obtain as few defects as possible. The input parameters of the solver is chemical composition Determined by the previous system module. Target wall thickness and HB of the product determined by the user. The method used to implement the solver is the method of Particle Swarm Optimization (PSO). The developed IT tool was used to determine the parameters of heat treatment, which will ensure obtaining the expected value for hardness. In the first stage, the ADI cast iron heat treatment parameters proposed by the expert were used, in the next part of the experiment, the settings proposed by the system were used. Used of the proposed IT tool, it was possible to reduce the number of deficiencies by 3%. The use of the solver in the case of castings with a wall thickness of 25 mm and 41 mm allowed to indication of process parameters allowing to obtain minimum mechanical properties in accordance with the PN-EN 1564:2012 standard. The results obtained by the solver for the selected parameters were verified. The indicated parameters were used to conduct experimental research. The tests obtained as a result of the physical experiment are convergent with the data from the solver.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 137--144
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Hardening of Nodular Cast Iron by GTAW Remelting
    Autorzy:
    Orłowicz, A. W.
    Trytek, A.
    Korzeniowski, M.
    Kupiec, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/379624.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solidification process
    mechanical properties
    nodular cast iron
    GTAW process
    surface layer
    proces krzepnięcia
    właściwości mechaniczne
    żeliwo sferoidalne
    proces GTAW
    warstwa powierzchniowa
    Opis:
    The study reported in this paper was aimed at establishing the effect of values of parameters characterizing the process of superficial remelting of a nodular iron casting on the quantity of introduced heat, geometry of remeltings as well as parameter λ and hardness of cementite eutectic. The remelting process was carried out using GTAW method, at electric arc length of 3 mm in argon atmosphere, welding current intensities I = 50, 130, 210, and 300 A, and electric arc scanning speeds vs = 200, 400, and 800 mm/min. The measurements included estimation of the quantity of heat introduced to the casting in the electric arc-induced remelting process with the use of flow calorimeter. Widths and depths of remetlings were assessed with the use of metallographic method. As a result of fast solidification, cementite eutectic was obtained in remelted material in which, in the course of cooling down to ambient temperature, austenite was subject to partial transformation into martensite. To characterize the cementite eutectic, value of the structural parameter λ was assessed. Values of the parameter were similar for areas of occurrence of both fibrous and laminated eutectic. Remeltings were examined at half of their depths. Micro-hardness measurements were taken in the same areas. The established quantitative relationships may prove to be useful in practice for the purpose of predicting values of parameter λ and hardness of remeltings in studies aimed at improving resistance of cast-iron castings to abrasive wear.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 53-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties and Structure of High-Silicone Austempered Ductile Iron
    Autorzy:
    Krzyńska, A.
    Kochański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382175.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    silicone content
    matrix structure
    mechanical properties
    ultimate tensile strength
    żeliwo sferoidalne
    zawartość krzemu
    właściwości mechaniczne
    wytrzymałość na rozciąganie
    Opis:
    The results presented in this paper are a continuation of the previously published studies. The results of hest treatment of ductile iron with content 3,66% Si and 3,80% Si were produced. The experimental castings were subjected to austempering process for time 30, 60 and 90 minutes at temperature 300oC. The mechanical properties of heat treated specimens were studied using tensile testing and hardness measurement, while microstructures were evaluated with conventional metallographic observations. It was again stated that austempering of high silicone ferritic matrix ductile iron allowed producing ADI-type cast iron with mechanical properties comparable with standard ADI.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Wall Thickness and Mould Temperature on Structure and Properties of Thin Wall Ductile Iron Castings
    Autorzy:
    Górny, M.
    Kawalec, M.
    Witek, G.
    Rejek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382589.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    mechanical properties
    ductile iron
    austenitic ductile iron
    high Ni alloying
    mould temperature
    thin wall casting
    metalografia
    właściwości mechaniczne
    metal ciągliwy
    żeliwo sferoidalne
    Opis:
    The excellent property combination of thin wall ductile iron castings (TWDI), including thin wall alloyed cast iron (e.g. austenitic TWDI) has opened new horizons for cast iron to replace steel castings and forgings in many engineering applications with considerable cost benefits. TWDI is considered as a potential material for the preparation of light castings with good mechanical and utility properties, the cost of which is relatively low. In this study, unalloyed and high Ni-alloyed (25% Ni) spheroidal graphite cast iron, with an austenitic metallic matrix were investigated. The research was conducted for thin-walled iron castings with 2, 3 and 5mm wall thickness, using different mould temperature (20°C, and 160°C) to achieve various cooling rates. The metallographic examinations i.e. characteristic of graphite nodules, metallic matrix, and primary grains of austenite dendrites (in high-nickel NTWDI) and mechanical properties were investigated. The study shows that homogeneity of the casting structure of thin-walled castings varies when changing the wall thickness and mould temperature. Finally, mechanical properties of thin-walled ductile iron castings with ferritic-pearlitic and austenitic metallic matrix have been shown.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 55-59
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości zastosowania nowej generacji żeliwa sferoidalnego (ADI) w budowie maszyn rolniczych
    Capability of adaptation the new generation ADI cast iron on the building of agricultural machines
    Autorzy:
    Kapcińska, D.
    Gościański, M.
    Łabęcki, M.
    Pirowski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/336020.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    maszyna rolnicza
    żeliwo sferoidalne
    ADI
    właściwości fizyczne
    właściwości mechaniczne
    właściwości tribologiczne
    struktura
    agricultural machine
    cast iron
    mechanical properties
    physical properties
    structure
    tribological properties
    Opis:
    W artykule poruszono możliwości zastosowania żeliwa sferoidalnego hartowanego z przemianą izotermiczną (ADI) na elementy pracujące w glebie. Omówiono historię opracowania tego tworzywa odlewniczego, jego właściwości fizykomechaniczne, strukturalne i tribologiczne w aspekcie wykonanych wstępnych badań laboratoryjnych.
    The paper presents the capability of adaptation the ADI cast iron of the working elements in soil. Report the history that material, physical - mechanical properties, structure and trybology in dimension to carry out the laboratory testing.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2006, 51, 3; 40-46
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern cored wire injection 2PE-9 method in the production of ductile iron
    Autorzy:
    Guzik, E.
    Wierzchowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382516.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    drut proszkowy
    żeliwo sferoidalne
    właściwości mechaniczne
    odzysk magnezu
    drum ladle
    cored wire injection method
    ductile iron
    Fesi + Mg nodulariser mixture
    inoculant master alloy
    mechanical properties
    magnesium recovery
    vertical ladle
    Opis:
    The results of studies on the use of modern two cored wires injection method for production of nodular graphite cast iron with use of unique implementation of drum ladle as a treatment/transport and casting ladle instead vertical treatment ladle was described. The injection of length of [...] 9mm wires, cored: in FeSi + Mg nodulariser mixture and inoculant master alloy is a treatment method which can be used to produce iron melted in coreless induction furnace. This paper describes the results of using this method for possibility production of ductile iron under specific industrial conditions. In this case was taken ductile iron with material designation: EN-GJS-450-10 Grade according PN-EN 1563:2000. Microstructure of 28 trials was controlled on internally used sample which has been correlated with standard sample before. The paper presents typical metallic matrix and graphite characteristic. Additionally, mechanical properties were checked in one experiment. Because of further possibility treatment temperature reduction only the rough magnesium recovery and cost of this new method are given.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using cored wires injection 2PE-9 method in the production of ferritic Si-Mo ductile iron castings
    Autorzy:
    Guzik, E.
    Wierzchowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380316.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    drut proszkowy
    żeliwo sferoidalne
    zaprawa modyfikująca
    właściwości mechaniczne
    odzysk magnezu
    drum ladle
    cored wires injection 2PE-9 method
    Si-Mo ductile iron
    Fesi + Mg nodulariser mixture
    inoculant master alloy
    ferritic matrix
    mechanical properties
    magnesium recovery
    vertical ladle
    Opis:
    The results of studies on the use of modern two cored wires injection method for production of ferritic nodular cast iron (ductile iron) with use of unique implementation of drum ladle as a treatment / transport and casting ladle instead vertical treatment ladle was described. The injection of length of [...] 9mm wires, cored: in FeSi + Mg nodulariser mixture and inoculant master alloy is a treatment method which can be used to produce iron melted in coreless induction furnace. This paper describes the results and analysis of using this method for optimal production of ductile iron under specific industrial conditions. It means, that length of nodulariser wire plus treatment and pouring temperatures were optimized. In this case, was taken ductile iron with material designation: EN-GJS-SiMo40-6 Grade according EN 16124:2010 E. Microstructure of great number of trials was controlled on internally used sample which has been correlated with standard sample before. The paper presents typical ferritic metallic matrix and nodular graphite. Additionally, mechanical properties were checked in some experiments. Mean values of magnesium recovery and cost of this new method from optimized process parameters were calculated as well.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 53-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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