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    Wyświetlanie 1-5 z 5
    Tytuł:
    Influence of welding time on quality of the friction welded joint of two dissimilar steels
    Autorzy:
    Ratković, N.
    Lazić, V.
    Arsić, D.
    Nikolić, R.
    Hadzima, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/114836.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    friction welding
    joint quality
    welding time
    friction time
    compacting time
    spawanie tarciowe
    jakość połączenia
    czas spawania
    czas tarcia
    Opis:
    There are several factors that influence the friction welding (FW) process, i.e. the quality of the welded joint, like the welding time, the contact pressure, the compacting pressure, the friction speed etc. The joining process is additionally complicated if the two different materials are to be welded to each other. The subject of research, presented in this paper, is the welding time of the FW process, since the level of axial and radial plastic deformation of the welded pieces and shortening of the welded part depend mainly on the welding time. The paper first presents some theoretical basics of the FW process and then, in the experimental part, the influence of the process duration is investigated. The two materials that the experimental samples were made of are the high-speed steel and the steel for tempering.
    Źródło:
    Zeszyty Naukowe. Quality. Production. Improvement; 2017, 1 (6); 1-11
    2544-2813
    Pojawia się w:
    Zeszyty Naukowe. Quality. Production. Improvement
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza czasu i wydajności spawania stali superdupleks
    Time and efficiency analysis of superduplex steel welding
    Autorzy:
    Chudziński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/95404.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    stal dupleks
    stal superdupleks
    SAF 2507
    X2CrNiMoN25-7-4 (14410)
    czas spawania
    wydajność spawania
    duplex steel
    superduplex steel
    X2CrNiMoN25-7-4(14410)
    welding time
    welding efficiency
    Opis:
    Praca zawiera charakterystykę stali dupleks oraz ilościowe statystyki i prognozy jej zastosowania. Przedstawiono także teorię w zakresie obliczania czasu głównego i czasu całkowitego spawania na podstawie objętości wykonywanej spoiny oraz współczynnika czasu jarzenia się łuku i wydajności stapiania. W części badawczej wykonano analizę porównawczą czasu i wydajności spawania w pozycji PF złącza blach o grubości 8 mm ze stali superdupleks X2CrNiMoN25-7-4 (1.4410), spawanego różnymi metodami. Analiza czasów oraz wydajności spawania pozwoliła ustalić różnice w tym zakresie między możliwymi do zastosowania metodami spawania i potwierdzić kilkukrotnie wyższą wydajność metody 136 (FCAW) niż pozostałych badanych: 111 (SMAW) i 141 (GTAW).
    This paper contains the characteristics of duplex steel and the quantitative statistics and forecasts for its use. There is presented theory of calculating main welding time and total welding time based on the volume of the weld, time factor of the arc's glow and melt efficiency. The comparative analysis of the welding time and efficiency in the PF position of the 8mm sheet metal joint of X2CrNiMoN25-7-4 (1.4410) superduplex stainless steel welded by various processes was performed. Analysis of welding times and weld efficiency has allowed us to determine the differences between the applicable welding processes and to confirm several times higher efficiency of the 136 process (FCAW) from the other examined: 111 (SMAW) and 141 (GTAW).
    Źródło:
    Postępy w Inżynierii Mechanicznej; 2017, 10(5); 5-14
    2300-3383
    Pojawia się w:
    Postępy w Inżynierii Mechanicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction to the examination of thin-walled structures using the vibrodiagnostic method
    Autorzy:
    Szeleziński, Adam
    Muc, Adam
    Murawski, Lech
    Doan, Do Van
    Powiązania:
    https://bibliotekanauki.pl/articles/242147.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    welding
    welded joints
    non-destructive testing
    vibrations
    time–frequency characteristics
    Opis:
    The article presents a methodology of non-destructive diagnostic vibratory tests of welded plates with geometrical parameters that classify them into a group of thin-walled panels. On the basis of such plates, most ship constructions are created. In previous works, the authors dealt with the study of welded joints in plates with significant thicknesses and developed for them a number of methods for assessing the quality of welded joints. Vibrodiagnostics is a NDT method that allows the use of a variety of techniques and tools. It enables measurements to be made in both a contact and non-contact way depending on the requirements of the structure and the environment. Vibrodiagnostic method is one of the most modern NDT methods, which uses modern measurement tools and computer analysis of data. On the basis of the developed methods, the authors intend to verify their application to plates from real welded constructions, which will be performed in typical shipyard conditions by welders. Such tests are important due to their use for the construction of a real SHM ship construction monitoring system. These methods allow for the examination of the condition of ships’ structural plates and can detect defects in welded joints that prevent ships from operating under severe sea conditions. The article presents the laboratory stand, the sensor layout, results, and their initial analysis.
    Źródło:
    Journal of KONES; 2019, 26, 4; 241-248
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time – frequency dynamic characteristics 2D in the quality assessment of welded joints
    Autorzy:
    Szeleziński, A.
    Muc, A.
    Murawski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/244249.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    welding
    welded joints
    non-destructive testing
    NDT
    SHM
    vibrations
    time–frequency characteristics
    Opis:
    The authors of the article have been looking for a new parameters and dynamic characteristics, which can be applied to non-destructive testing of welded joints. All characteristics have been based on recorded data generated during the vibration tests of welded joints with and without failures. The article deals with the methods of assessing welding joints using 2D: time – frequency dynamic characteristics. A calculation procedure used for analysing simultaneous changes of the response modules, registered by acceleration sensors was presented. Vibrations amplitudes were transformed to a function of time and frequency (simultaneously) and presented over 2D time – frequency characteristics. The analyses of the characteristics were performed for a plate without any welded joint, for a plate with non-defected welded joint and for a plate with a welded joint defected by an edge bonding. Having analysed registered 2D time – frequency dynamic characteristics it can be noticed that presenting the responses analysed simultaneously over the time and frequency allows evaluating if examined system maintains non-linearity and, at the same time, it allows to indirectly assess the quality of the welded joint. The proposed measure parameters of the quality of a welded joint can be defined as a dispersion of colours on the obtained characteristics. The faults (and the vibration nonlinearity) of the welded joints is bigger if the dispersion is greater.
    Źródło:
    Journal of KONES; 2018, 25, 2; 357-361
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    2D and 3D time-frequency dynamic characteristics in the quality assessment of welded joints
    Autorzy:
    Szeleziński, A.
    Muc, A.
    Murawski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/135313.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    welding
    welded joints
    non-destructive testing
    NDT
    SHM
    vibrations
    time-frequency characteristics
    Opis:
    The authors of this article have been looking for new parameters and dynamic characteristics which can be applied to the non-destructive testing of welded joints. All the characteristics have been based on the recorded data generated during the vibration tests of welded joints both with and without failures. This article has dealt with the methods of assessing welded joints using either 2D or 3D time-frequency dynamic characteristics. The calculation procedure that was used for analyzing the simultaneous changes of the response modules, registered by acceleration sensors, has been presented. The vibration amplitudes were transformed into a function of time and frequency (simultaneously) and presented over 2D or 3D time-frequency characteristics. The analyses of the characteristics were performed for a plate without a welded joint, for a plate with a non-defective welded joint and for a plate with a defective welded joint caused by edge bonding. Having analyzed and registered the 2D or 3D time-frequency dynamic characteristics it could be noticed that by presenting the responses, analyzed simultaneously against time and frequency, allowed for the evaluation of whether the examined system maintained non-linearity and, at the same time, allowed for the quality of the welded joint to be indirectly assessed. The proposed measurement parameters of the quality of a welded joint can be defined as a dispersion of the colors from the obtained characteristics. The faults (and the vibration nonlinearity) of the welded joints will be bigger if the dispersion is greater.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 56 (128); 41-46
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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