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Wyszukujesz frazę "Winczek, M." wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    Tytuł:
    Stwierdzenie Corbicula fluminea (O. F. Müller, 1774) (Veneroida: Corbiculidae) w Wiśle w Warszawie
    Records of the Asian clam Corbicula fluminea (O. F. Müller, 1774) (Veneroida: Corbiculidae) in the Vistula River in Warsaw
    Autorzy:
    Romanowski, J.
    Winczek, M.
    Ceryngier, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/32879.pdf
    Data publikacji:
    2016
    Wydawca:
    Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
    Opis:
    Two empty shells of the Asian clam Corbicula fluminea were recorded on left bank of Vistula river in Warsaw (52°17’07”N, 20°59’42”E) on 29 June, 2016 (photo 4). Altogether, 19 paired and 76 single empty valves were collected during following surveys of left and right banks of the river and two oxbows within city limits in July and August 2016. A total of 8 live bivalves were collected from the river bed and the oxbow at the depth of about 40 cm. The largest empty shell was 31.6 mm wide and 29.1 mm long. The live specimens measured 9.4-22.5 mm in width and 8.3-25.2 mm in length. The records of the Asian clam Corbicula fluminea in Warsaw document spreading of this invasive species down the Vistula River from the upper part of the river.
    Źródło:
    Kulon; 2016, 21
    1427-3098
    Pojawia się w:
    Kulon
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Properties of High Chromium Hardfacings Made with Using Pulsed Arc
    Autorzy:
    Gucwa, M.
    Winczek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381430.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    heat input
    self-shielded cored wire
    dilution
    napawanie
    dopływ ciepła
    rdzeń
    Opis:
    The paper discusses the possibility of using pulsed arc hardfacing for depositing high chromium and carbon surfaces. In these studies self-shielded cored wire was used as a material for hardfacing. Pulsed arc is used in welding technologies to better control of transport molten metal in the welding arc and heat input. The correct heat input results in limited dilution surfaces that is very important in wear prevention technologies. The paper presents the results of research on the geometric parameters and hardness of deposited surfaces. The investigation was carried out with various welding parameters that were designed in heat source. The survey was conducted on the specimens that were subjected to metallographic examination hardness test.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 37-40
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The modelling of temperature-dependent stress-strain curves for weldable steels
    Autorzy:
    Winczek, J.
    Mičian, M.
    Ivanov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/122437.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    modelling
    thermomechanics
    stress-strain curve
    spawanie stali
    modelowanie
    termomechanika
    krzywa naprężenie-odkształcenie
    stal spawalna
    właściwości mechaniczne
    Opis:
    The calculation of stresses in the steel elements subjected to the thermomechanical loads requires taking into account the influence of temperature on mechanical properties of a material, including the stress-strain curve. The simplified and extended computational models of temperature-dependent tensile curves have been discussed. The methodology of the stress-strain curve construction in the entire temperature range of the solid state of the material has been proposed. The considerations are illustrated by the examples of calculated stress-strain curves in different temperatures for S235 and S355 welding steels.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 3; 111-117
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of thermal cycles and phase transformations during multi-pass ARC weld surfacing of steel casts taking into account heat of the weld
    Autorzy:
    Winczek, J.
    Gucwa, M.
    Makles, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/122834.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    surface treatment
    temperature field
    phase transformations
    welding
    surfacing
    obróbka powierzchniowa
    przemiany fazowe
    pole temperatury
    spawanie
    napawanie
    Opis:
    In this work, a model of phase transformations during multipass weld surfaced steel casts is presented. In the temperature field calculation algorithm, the influence of the heat of overlaying beads and a self-cooling of previously overlayed beads have been taken into account. The fusion area, full and part transformation zones, by solidus, A1 and A3 and A A1 temperatures has been determined, respectively. The temperatures of the beginning and the end of the phase changes during cooling were determined on the basis of the time-temperature-transformation welding diagram. In the phase change kinetic description, the JMAK law and KM formula were used. Theoretical considerations are illustrated by example of volume share calculations of particular structural components during the weld surfaced 230-450 W steel cast. The results of computation in the graphical forms are presented: welding thermal cycle diagrams and structural share change histories at selected points, as well as temperature and the phase share distributions in cross section.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 1; 89-100
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Coatings Made with Self Shielded Cored Wire
    Autorzy:
    Gucwa, M.
    Winczek, J.
    Bęczkowski, R.
    Dośpiał, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381066.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    metallography
    hardfacing
    carbides
    hardness
    cored wire
    stopy odporne na zużycie
    metalografia
    napawanie
    węgliki
    twardość
    drut rdzeniowy
    Opis:
    The welding technologies are widely used for design of protection layer against wear and corrosion. Hardfacing, which is destined for obtaining coatings with high hardness, takes special place in these technologies. One of the most effective way of hardfacing is using self shielded flux cored arc welding (FCAW-S). Chemical composition obtained in flux cored wire is much more rich in comparison to this obtained in solid wire. The filling in flux cored wires can be enriched for example with the mixture of hard particles or phases with specified ratio, which is not possible for solid wires. This is the reason why flux cored wires give various possibilities of application of this kind of filler material for improving surface in mining industry, processing of minerals, energetic etc. In the present paper the high chromium and niobium flux cored wire was used for hardfacing process with similar heat input. The work presents studies of microstructures of obtained coatings and hardness and geometric properties of them. The structural studies were made with using optical microscopy and X- ray diffraction that allowed for identification of carbides and other phases obtained in the structures of deposited materials. Investigated samples exhibit differences in coating structures made with the same heat input 4,08 kJ/mm. There are differences in size, shape and distribution of primary and eutectic carbides in structure. These differences cause significant changes in hardness of investigated coatings.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 39-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration
    Autorzy:
    Gucwa, M.
    Winczek, J.
    Wieczorek, P.
    Mičian, M.
    Koňár, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049557.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    carbides
    hardness
    wear
    covered electrode
    Opis:
    The application of hardfacing is one of the ways to restore the functional properties of worn elements. The possibility of using filler materials rich in chrome allows for better wear resistance than base materials used so far. The paper presents the results of research on the use of 3 different grades of covered electrodes for the regeneration of worn track staves. The content of the carbon in the covered electrodes was from 0,5% to 7% and the chromium from 5% to 33%. The microscopic and hardness tests revealed large differences in the structure and properties of the welds. The differences in the hardness of the welds between the materials used were up to 150 HV units. The difference in wear resistance, in the ASTM G65 test, between the best and worst materials was almost 12 times big.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 31-36
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Type of Welding Sequence During Hardfacing Chromium Cast Iron for Erosion Resistance
    Autorzy:
    Gucwa, M.
    Bęczkowski, R.
    Winczek, J.
    Wyleciał, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382472.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    hardfacing
    erosion
    welding
    hardness
    stopy odporne na zużycie
    napawanie
    erozja
    spawanie
    twardość
    Opis:
    The paper presents the capabilities of welding techniques to creating properties of wear resistant high chromium cast iron alloy. The use of the right kind of welding sequence allows you to change the structure and properties of the obtained welds. Tests were conducted for one type of additive material in the form of self shielded core wire. In order to determine the effect of the type of welding sequence on the properties of welds performed welding using string bead and weave bead. The resulting weld was tested on hardness and research structure in an optical microscope. In the following studies have been made erosive tests wear of made hardfacing. String beads gave structure rich in carbides and harder about 270 HV of the weld with weave bead. Also, wear resistance was nearly twice as better for welds made with string beads. In the experiment a decisive role in the resistance to wear plays a high hardness of the deposit and the presence of carbides in its structure. Changes in the basic parameters of the deposition process allows for the formation of structure and properties of hardfacing welds in a wide range.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrasonic Control of Ductile Cast Iron Castings by Phased Array Technique
    Autorzy:
    Boháčik, M.
    Mičian, M.
    Koňár, R.
    Trško, L.
    Winczek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380009.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile cast iron
    technological casting parameters
    ultrasonic testing
    phased array
    żeliwo sferoidalne
    parametry technologiczne
    badania ultradźwiękowe
    Opis:
    The goal of this article is non-destructive ultrasonic testing of internal castings defects. Our task was to cast several samples with defects like porosity and cavities (where belongs mostly shrinkages) and then pass these samples under ultrasonic testing. The characteristics of ultrasonic control of castings are presented in the theoretical part of this article. Ultrasonic control is a volume non-destructive method that can detect internal defects in controlled materials without damaging the construction. It is one of the most widely used methods of volume non-destructive testing. For experimental control were made several cylindrical samples from ferritic grey and ductile cast iron. Because of the form and dispersion of graphite of grey cast iron it was not possible to make ultrasonic records on this casting with probe we used, so we worked only with ductile cast iron. Ultrasonic records of casting control are shown and described in the experimental part. The evaluation of the measurement results and the reliability of the ultrasonic method in castings control is listed at the end of this article.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 9-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Repair of Foundry Defects in Steel Castings Using Welding Technology
    Autorzy:
    Mičian, M.
    Koňár, R.
    Hlavatý, I.
    Winczek, J.
    Gucwa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380199.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steel casting
    repair by welding
    mechanical testing
    approval of welding procedure
    odlew staliwny
    spawanie naprawcze
    badania mechaniczne
    Opis:
    Use of welding technology for the repair of steel castings is particularly common in two areas. These include weld surfacing of protrusions that remained incomplete after casting, or filling the surface defects (cavities). These defects are more common for steel casting than for graphite cast iron, due to the lower fluidity of steel. This article describes a suitable technological process of repairing the defects on the casting using the welding technology. A specimen produced for this purpose was prepared by carving a groove into a cast steel plate 20 GL, which was then filled with a weld metal using MAG (135) technology. The following evaluation of the basic characteristics of the repaired site point to the suitability of the selected technological parameters of the repair procedure. Metallographic evaluation was carried out, further evaluation of mechanical properties by tensile test, bend test and Vickers hardness test. The proposed methodology for the evaluation repair of foundry defects in steel castings also meets the requirements for the approval of welding procedures in accordance with the relevant valid legislation.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 177-180
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Evaluation of the Wear Mechanism of High-Carbon Hardfacing Layers
    Autorzy:
    Winczek, J.
    Gucwa, M.
    Mičian, M.
    Koňár, R.
    Parzych, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/354160.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    self shielded flux cored arc welding
    cast iron
    erosion
    wear
    structure
    Opis:
    Materials based on cast irons are often used for protection against wear. One of the methods of creating protective surface with cast iron structures is hardfacing. The application of hardfacing with self shielded flux cored wire with high carbon content is one of the economical ways often used to protect machinery parts exposed to both abrasion and erosion. The wear resistance of hardfacings depends on their chemical composition, structure obtained after hardfacing, parameters of depositing process andspecific conditions of wear. As the base material in the investigation the steel grade S235JR was used. The wear behavior mechanism of hardfacings made with one type of self shielded flux cored wire and different process parameters were evaluated in thispaper. Structures obtained in deposition process were different in hardness, amount of carbides and resistance to wear with two investigated impingement angles. The erosion tests showed that impingement angle 30° gives lower erosion rate than angle 60°.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1111-1115
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Simulation of Individual Heat-Affected Zones in S960MC Steel
    Autorzy:
    Mičian, M.
    Winczek, J.
    Harmaniak, R.
    Koňár, R.
    Gucwa, M.
    Moravec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049636.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties of heat affected zone
    steel S960MC
    physical simulation
    Gleeble 3500
    Opis:
    This research is focused on the analysis of heat-affected sub-zones in 2 mm thick steel S960MC samples, with the aim of observing and evaluating the mechanical properties after exposure to temperatures corresponding to individual heat-affected sub-zones. Test samples were prepared using a Gleeble 3500 thermo-mechanical simulator. The samples were heated in the range from 550°C to 1350°C and were subsequently quickly cooled. The specimens, together with the base material, were then subjected to tensile testing, impact testing, and micro-hardness measurements in the sample cross-section, as well as evaluation of their microstructure. Fracture surfaces are investigated in samples after impact testing. The heat-affected sub-zones studied indicate high sensitivity to the thermal input of welding. There is a significant decrease in tensile strength and yield strength at temperatures around 550°C.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 81-89
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of thermal cycle ci engine with multi-stage fuel injection
    Autorzy:
    Jamrozik, A.
    Tutak, W.
    Gnatowski, A.
    Gnatowska, R.
    Winczek, J.
    Sosnowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/102895.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    thermal cycle
    diesel engine
    multi-stage fuel injection
    CFD
    Opis:
    This work presents a complete thermal cycle modeling of a four-stroke diesel engine with a three-dimensional simulation program CFD - AVL Fire. The object of the simulation was the S320 Andoria engine. The purpose of the study was to determine the effect of fuel dose distribution on selected parameters of the combustion process. As a result of the modeling, time spatial pressure distributions, rate of pressure increase, heat release rate and NO and soot emission were obtained for 3 injection strategies: no division, one pilot dose and one main dose and two pilot doses and one main dose. It has been found that the use of pilot doses on the one hand reduces engine hardness and lowers NO emissions and on the other hand, increases soot emissions.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 179-186
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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