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Wyszukujesz frazę "heating of steel charge" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Influence of Initial Charge Temperature and Furnace Exploitation on Steel Loss
    Autorzy:
    Boryca, Jarosław
    Wyleciał, Tomasz
    Urbaniak, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2048863.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heating of steel charge
    loss of steel
    initial charge temperature
    furnace exploitation
    Opis:
    Steel loss related to the formation of scale is a parameter that is of great importance in the charge heating process. The value of steel loss determined by the thickness of the scale layer affects the intensity of the heat transfer process in the heating furnace, but also constitutes a significant element in the heat-material balance. Reducing the loss of steel during charge heating has a positive effect on heat consumption and material losses, which is extremely important in the context of energy and resource savings, the main elements of sustainable development processes. The methodology of determining the loss of steel to scale in an industrial heating furnace is presented in the paper. The results of calculations for various charge temperatures at the entrance to the furnace are presented. The influence of furnace operating conditions on steel loss is discussed.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 289-291
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The verification of the influence of heating steel charge parameters on the thickness of scale layer
    Autorzy:
    Benduch, A
    Boryca, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/102609.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    heating of steel
    oxidation
    scale
    Opis:
    Parameters of heating are understood as the conditions in which heating process is conducted to obtain the required steel properties. During the heating process, on the surface of heated elements, layer of scale is formed as a by-product,. The selection of appropriate heating parameters allows for achieving the required layer of scale, and thus the predictability of the process effects . The article presents sample calculations of heating parameters for the charge of steel and the analysis of the results of conducted experiments.
    Źródło:
    Advances in Science and Technology. Research Journal; 2013, 7, 18; 1-5
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research of the Impact of the Heating Rate on Adhesion of Scale Arising in the Process of Heating of the Steel Charge Before the Plastic Reworking
    Autorzy:
    Boryca, Jarosław
    Kolmasiak, Cezary
    Wyleciał, Tomasz
    Urbaniak, Dariusz
    Kizek, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/27315812.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    heating of charge
    preheating rate
    heating technology
    loss of steel
    adhesion of scale
    nagrzewanie wsadu
    szybkość podgrzewania
    technologia grzewcza
    strata stali
    Opis:
    Before steel materials are subjected to an appropriate heat treatment, they must be preheated. During this process scale is formed, which can be a problem in the proper heat treatment of the steel charge. The preheating process of the steel charge is carried out under specific conditions – parameters. These conditions determine certain properties of scale. One of the most important issues in this context, important from the point of view of the potential removal of scale from the charge surface, is the correlation of the heating process temperature and the adherence of the scale to the steel substrate. The paper presents the results of such research and their discussion. In addition, the methodology for measuring the scale adhesion to steel substrate is presented. Mathematical relations endearing impact of heating rate on the scale adhesion have been developed.
    Źródło:
    New Trends in Production Engineering; 2019, 2, 2; 301-311
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The possibilities of co2 emission reduction in the process of steel charge heating through the selection of heating rate
    Autorzy:
    Halusiak, B.
    Kieloch, M.
    Boryca, J.
    Benduch, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/102109.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    CO2 emission
    heating of charge
    heating technology
    heating up rate
    numerical modelling
    Opis:
    The reduction of carbon dioxide emission is an important aspect of the economic policy of each country. Institutions promoting environmental protection seek to reduce the level of greenhouse gas emissions. One of the main emitters of harmful gases to the atmosphere is the steelmaking sector. The heating technology used in metallurgical works contributes to the amount of emitted carbon dioxide that forms as a result of the loss of steel and the combustion of fuel, whose thermal energy is used during the course of the charge heating process in the heating furnace. Achieving the imposed ecological targets by not exceeding the specified emission level is possible by implementing appropriate pollutant emission reducing technologies in the metallurgical industry. Based on numerical computation results, the effect of heating rate on the emission of carbon dioxide has been determined in the paper. This study demonstrates that by selecting the appropriate steel charge heating technology the emissions of greenhouse gases can be substantially reduced.
    Źródło:
    Advances in Science and Technology. Research Journal; 2015, 9, 27; 17-22
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Heating Temperature of a Nickel-Chromium Steel Charge Material on the Stability of the Forging Process and the Durability of the Die
    Autorzy:
    Hawryluk, Marek R.
    Lachowicz, Marzena
    Janik, Marta
    Gronostajski, Zbigniew
    Stachowicz, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/28099626.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    forging
    engine
    chromium-nickel steel with austenitic microstructure
    valve
    forging tools
    Opis:
    The study discusses the issues of low durability of dies used in the first operation of producing a valve type forging from high nickel steel assigned for the application in motor truck engines. The analyzed process of manufacturing the exhaust valve forgings is realized in the coextrusion technology, followed by forging in closed dies. This process is difficult to master, mainly due to elevated adhesion of the charge material (high nickel steel - NCF3015) to the tool substrate as well as very high abrasive wear of the tool, most probably caused by the dissolution of hard carbide precipitates during the charge heating. A big temperature scatter of the charge during the heating and its short presence in the inductor prevents microstructure homogenization of the bearing roller and dissolution of hard precipitates. In effect, this causes an increase of the forging force and the pressures in the contact, which, in extreme cases, is the cause of the blocking of the forging already at the beginning of the process. In order to analyze this issue, complex investigations were conducted, which included: numerical modelling, dilatometric tests and hardness measurements. The microstructure examinations after the heating process pointed to lack of structure repeatability; the dilatometric tests determined the phase transformations, and the FEM results enabled an analysis of the process for different charge hardness values. On the basis of the conducted analyzes, it was found that the batch material heating process was not repeatable, because the collected samples showed a different amount of dissolved carbides in the microstructure, which translated into different hardnesses (from over 300 HV to 192 HV). Also, the results of numerical modeling showed that lower charge temperature translates into greater forces (by about 100 kN) and normal stresses (1000 MPa for the nominal process and 1500 MPa for a harder charge) and equivalent stresses in the tools (respectively: 1300 MPa and over 1800 MPa), as well as abrasive wear (3000 MPa mm; 4500 MPa mm). The obtained results determined the directions of further studies aiming at improvement of the production process and thus increase of tool durability.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 2; 711--722
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of the process of heating of a bed of steel bars
    Numeryczna analiza procesu nagrzewania złoża prętów stalowych
    Autorzy:
    Musiał, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/350896.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    proces nagrzewania
    złoża prętów stalowych
    heating of porous charge
    bed of bars
    Opis:
    The article describes the computation of the time of heating of a bed of bars in the heat treatment process. The charge was subjected to under-annealing, which is used in industry, e.g., to facilitate sawing of bars or billets into a sections intended for hot forging. The beds under examination were regarded as solid elements, which was possible thanks to the knowledge of the effective thermal conductivity, ?. The value of this quantity for the temperature range under consideration was determined based on the author’s original investigation. During heating of a bundle of bars at a constant heating medium temperature, a temperature difference occurs on the charge cross-section, which is significantly greater than that provided for by the technology. It is therefore essential to carry out a second soaking stage in order to achieve the cross-sectional temperature difference at a level of 20°C. The computation of soaking was conducted for the assumed conditions of a constant temperature on the charge surface and the parabolic distribution of temperature on the cross-section.
    W artykule przedstawiono obliczenia czasu nagrzewania złoża prętów w procesie obróbki cieplnej. Wsad poddano wyżarzaniu niezupełnemu, które stosuje się w przemyśle np. w celu ułatwienia ciecia prętów lub kesów na piłach, na odcinki przeznaczone do kucia na gorąco. Analizowane złoża rozpatrywano jako element lity, co było możliwe dzięki znajomości efektywnego współczynnika przewodzenia ciepła. Wartość tego współczynnika dla rozpatrywanego zakresu temperatury określono na podstawie badań własnych autora. Podczas nagrzewania wiązki prętów w stałej temperaturze ośrodka nagrzewającego na przekroju wsadu pojawia sie znaczna różnica temperatur niż zakłada to technologia. W związku z tym niezbędne jest przeprowadzenie drugiego etapu wygrzewania celem uzyskania na przekroju wsadu różnicy temperatur na poziomie 20_C. Obliczenia wygrzewania przeprowadzono dla założonych warunków stałej temperatury na powierzchni wsadu i parabolicznego rozkładu temperatury na przekroju.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 1; 63-66
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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