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    Wyświetlanie 1-5 z 5
    Tytuł:
    Distortion of 16MnCr5 steel parts during low-pressure carburizing
    Autorzy:
    Dybowski, K.
    Niewiedzielski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/102321.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    thermo-chemical treatment
    low pressure carburizing
    distortion
    gas quenching
    Opis:
    One of the many advantages of low pressure carburizing (LPC) is that it can be combined with high-pressure gas quenching. This makes it possible to achieve workpieces with pure metallic surfaces, less distortion hardening, and, above all, it allows a more reliable and repeatable treatment than conventional oil quenching. This article presents a study of the distortion rate of workpieces carburized at low pressure then quenched in nitrogen at 1.4 MPa. By comparing the distortion which takes place during the carburizing stage only and the carburizing combined with post-carburizing heat treatment it will be possible to assess the distortion rate and its causes at the different stages of the heat treatment process.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 1; 201-207
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of the Quenching Method on the Deformations Size of Gear Wheels after Vacuum Carburizing
    Autorzy:
    Dybowski, K.
    Sawicki, J.
    Kula, P.
    Atraszkiewicz, R.
    Lipa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/352890.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermo-chemical treatment
    vacuum carburizing
    carburized layer
    quenching
    quenching deformations
    low-pressure carburizing
    Opis:
    This paper presents a comparison of the deformations and residual stresses in gear wheels after vacuum carburizing process with quenching in high-pressure nitrogen and oil. The comparison was made on a medium-sized gear wheels, made of AMS6265 (AISI 9310) steel. This steel is applied in the aerospace industry for gears. The study has provided grounds for an assessment of the effect of the method of quenching on the size of deformations. Compared to oil quenching, high-pressure gas quenching following vacuum carburizing resulted in more uniform and smaller deformations.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1057-1062
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of quenching temperature on distortions during the individual quenching method
    Autorzy:
    Wołowiec-Korecka, E.
    Stachurski, W.
    Zgórniak, P.
    Korecki, M.
    Brewka, A.
    Byczkowska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818490.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    thermal treatment
    distortion
    quenching
    low-pressure carburizing
    obróbka termiczna
    zniekształcenie
    hartowanie
    nawęglanie niskociśnieniowe
    Opis:
    Purpose: In this paper, the impact of hardening temperature on the quenching distortions which occur during low-pressure carburizing with gas quenching - using the individual quenching method - was analysed. Design/methodology/approach: The reference elements were subjected to carburizing at 980°C, followed by gas quenching at temperatures of 860°C, 920°C and 980°C. The geometrical measurements of the elements were made before and after the chemical treatment and the size of the quenching distortions of their geometrical parameters was determined. Findings: It was demonstrated that a high temperature of quenching has an unfavourable effect on changes in cylindricity and roundness parameters but, at the same time, reduces the size of distortion of outer parameters. Low temperature quenching reduces quenching distortions of cylindricity and roundness parameters while increasing the distortion of outer dimensions. Research limitations/implications: Based on the research and analysis carried out in this work, it was found that the use of lower quenching temperature is justified in economic and quality terms. Practical implications: In the case of the aviation or automotive industry, very high quality of manufactured elements along with a simultaneous reduction of their production costs is extremely important. Maintaining the dimensions of the elements during heat treatment is extremely difficult. The tests allowed to determine the optimal hardening temperature, which brings with it acceptable deformations. Since it is easier to “repair” the outer geometrical dimensions (diameter, thickness), it seems that quenching from lower temperatures is a more favourable process. Originality/value: The conducted tests allowed to determine the most favourable conditions for hardening elements from the automotive industry, taking into account the occurring deformations and their subsequent processing
    Źródło:
    Archives of Materials Science and Engineering; 2020, 105, 2; 80--85
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and hardness of Pyrowear 53 steel after low-pressure vacuum carburizing at 921°C
    Autorzy:
    Wojtyczka, Artur
    Iżowski, Bartosz
    Powiązania:
    https://bibliotekanauki.pl/articles/1831343.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    low-pressure carburizing
    diffusion
    Pyrowear 53 steel
    nawęglanie niskociśnieniowe
    dyfuzja
    stal Pyrowear 53
    Opis:
    The present paper studies and analyzes the low-pressure vacuum carburizing of Pyrowear 53 steel. The carburizing was performed at 921°C. The results after the completion of the treatment process are presented, i.e. microstructure of the surface layer and hardness. The results confirm that carburizing can be effectively used in hardening of the steel.
    Źródło:
    Advances in Manufacturing Science and Technology; 2020, 44, 4; 109-112
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Devices for modern vacuum heat treatment
    Autorzy:
    Korecki, M.
    Brewka, A.
    Wołowiec-Korecka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/379303.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    heat treatment
    vacuum heat treatment
    furnace
    carburizing
    quenching
    low pressure carburizing
    nitriding
    advanced vacuum applications
    obróbka cieplna
    próżniowa obróbka cieplna
    piec
    nawęglanie
    hartowanie
    nawęglanie niskociśnieniowe
    azotowanie
    zaawansowane zastosowania próżniowe
    Opis:
    Purpose: A review regarding the devices for vacuum heat treatment is presented. Design/methodology/approach: Devices for modern heat treatment has been reviewed. The devices has been classified regarding the heat treatment (quenching, carburizing, nitriding, tempering and annealing). The possible application, materials and parts for heat treatment as well as parameters of the devices has been analysed. Findings: There is a wide range of modern vacuum heat treatment devices. All currently used heat and thermo-chemical treatments may be proceed in vacuum equipment. It is also in many cases preferable to use vacuum- because of economic reasons, better metallurgical results or environmental friendliness. Also software simulators which facilitates the planning of heat treatment are available with the equipment. Practical implications: Because of the industry expectations regarding efficiency, quality, economy and safety, vacuum equipment becoming the subject of wider and wider attention. In particular, aerospace and automotive industries pay a lot of attention to these aspects. The basic task of vacuum devices is fast, effective, environmentally friendly production of high quality machine parts. Originality/value: The synthetic presentation of modern devices for vacuum heat treatment was presented, in particular furnaces for quenching, carburizing, nitriding, tempering and annealing. The products characteristic and applications has been presented. Also equipment for some advanced vacuum applications has been presented. Modern software which complements the devices in terms of designing heat treatment processes has been described.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 95, 2; 77-85
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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