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    Wyświetlanie 1-5 z 5
    Tytuł:
    Manufacturing Methods of Alloy Layers on Casting Surfaces
    Autorzy:
    Szajnar, J.
    Wróbel, T.
    Dulska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/107005.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    cast steel
    cast iron
    monolithic and granular inserts
    alloy layer
    stainless steel
    Opis:
    In this paper, we presented the technology of layered castings based on the founding method of layer coating directly in the cast process known as the method of mold cavity preparation by monolithic or granular material of insert. Prepared castings consist of two fundamental parts: the base part and working part (layer). The base part of a layered casting is usually typical foundry material (i.e., pearlitic grey cast iron with flake graphite or ferritic-pearlitic carbon cast steel), whereas the dependence of an insert type (i.e., monolithic or granular) working part (layer) is suitably plated with ferrit‑ ic and austenitic alloy steels or a layer from a Cr-base alloy. The ratio of thickness between the base and working part is between 8:1 and 10:1. The quality of the layered castings was evaluated on the basis of ultrasonic non-destructive test‑ ing, structure, and selected usable property research. According to work out technology, the prepared layered castings can work in conditions that require high heat resistance and/or corrosion resistance from the working surface layer of an element in a medium of industrial water, for example. Moreover, in the case of applying an insert based on Cr-base alloy powder on the working surface layer, it is possible to obtain high hardness and abrasive wear resistance.
    Źródło:
    Journal of Casting & Materials Engineering; 2017, 1, 1; 2-6
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Heat Treatment on the Microstructures 20%Cr-21%Ni-5%Si Cast Steel
    Autorzy:
    Kalandyk, B.
    Kasińska, J.
    Olejnik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/381678.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austenitic cast steel
    stainless steel
    cast steel microstructure
    heat treatment
    staliwo austenityczne
    stal nierdzewna
    mikrostruktura staliwa
    obróbka termiczna
    Opis:
    The study describes the effect of heat treatment on the microstructure of cast high-alloyed 20%Cr-21%Ni-5%Si steel. It has been found that the microstructure of the tested material in the initial state consists of an austenitic matrix and precipitates rich in Si, Cr, Ni and Mn, characterized by different morphology and distributed mainly along the grain boundaries. The conducted heat treatment (after solutioning at: 1060, 1100 and 1200ºC) has changed both morphology and chemical composition of the precipitates. Significant reduction in the Si and Ni content and slight increase in the Cr content, especially after solutioning at 1200°C, combined with a simultaneous decrease in the hardness of the precipitates was evidenced.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2 spec.; 39-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bimetallic Casting: Ferritic Stainless Steel – Grey Cast Iron
    Odlew bimetalowy: ferrytyczna stal nierdzewna – żeliwo szare
    Autorzy:
    Wróbel, T.
    Szajnar, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/354925.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bimetallic casting
    grey cast iron
    stainless steel
    odlew bimetalowy
    ferrytyczna stal nierdzewna
    żeliwo szare
    Opis:
    The paper presents the problem of obtaining a permanent diffusional joint between the working surface layer and the base part in a bimetallic casting. The studied bimetallic casting was obtained as a result of using the founding method of layer coating directly in the cast process. The casting prepared using this method consists of two fundamental parts, i.e., the grey cast iron base and the working surface layer which constitutes of X6Cr 13 high-chromium stainless steels plate. Based on the obtained results it was confirmed that the decisive phenomena that are needed to create a permanent joint between the two components of the bimetallic casting are carbon and heat transport from the high-carbon and hot base material which was poured into the mould in the form of liquid metal to the low-carbon and cold material of the working layer which was placed in the mould cavity in the form of a monolithic insert.
    W pracy przedstawiono problematykę uzyskiwania trwałego połączenia pomiędzy warstwą roboczą a częścią nośną w odlewie bimetalowym, który został wykonany przy użyciu metody nakładania warstw bezpośrednio w procesie odlewania. Wykonane tą metodą odlewy złożone są z dwóch zasadniczych elementów tj. części nośnej z żeliwa szarego oraz warstwy roboczej, którą stanowi blacha ze stali ferrytycznej odpornej na korozję gatunku X6Cr 13. Stwierdzono, że zjawiskami decydującymi o utworzeniu trwałego połączenia pomiędzy łączonymi tworzywami składowymi bimetalicznego odlewu warstwowego jest transport węgla i ciepła w kierunku od wysokowęglowego i gorącego materiału części nośnej wlewanego do formy w postaci ciekłego metalu do niskowęglowego i zimnego materiału warstwy roboczej umieszczanego w postaci wkładki monolitycznej we wnęce formy.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3; 2361-2365
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Self-hardening of X46Cr13 Steel Integrated with Base from Grey Cast Iron in Bimetallic System
    Autorzy:
    Przyszlak, N.
    Wróbel, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380104.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bimetallic casting
    stainless steel
    grey cast iron
    hardness
    microstructure
    odlew bimetaliczny
    stal nierdzewna
    żeliwo szare
    twardość
    mikrostruktura
    Opis:
    The paper presents the technology of manufacturing layered castings, consisting of grey cast iron (base part) and high-chromium stainless steel (working part/layer). The aim of researches was an attempt of integration of heat treatment of steel X46Cr13 grade with founding of grey cast iron in bimetallic system and determination of the influence of cooling rate of bimetallic system in classical sand mould with bentonite on microstructure and hardness of the working layer. The castings were manufactured using mould cavity preparation method, where steel plate was poured by grey cast iron using different pouring temperature and thickness of base part. Then, the quality of joint between cast iron and steel plate was estimated by using ultrasonic non-destructive testing. The efficiency of heat treatment process was analysed by measurement of hardness and in metallographic examination. Conducted studies showed, that self-hardening’s ability of steel X46Cr13 let obtain technologically usable layered casting characterized by hardness of working surface up to 35 HRC.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 29-34
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors Influencing Cavitation Erosion of NiCrSiB Hardfacings Deposited by Oxy-Acetylene Powder Welding on Grey Cast Iron
    Autorzy:
    Szala, Mirosław
    Walczak, Mariusz
    Hejwowski, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2023792.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hardness
    stainless steel
    cavitation erosion
    cast iron
    surface engineering
    powder welding
    surface roughness
    hardfacing
    twardość
    stal nierdzewna
    erozja kawitacyjna
    żeliwo
    inżynieria powierzchni
    spawanie proszkowe
    chropowatość powierzchni
    utwardzanie
    Opis:
    The work presents the results of a study on cavitation erosion (CE) resistance of two NiCrSiB self-fluxing powders deposited by oxy-acetylene powder welding on cast iron substrate grade EN-GJL-200. The mean hardness of deposits A-NiCrSiB, C-NiCrSiB is equal to 908 HV, 399 HV and exceeds those of EN-GJL-200 and X5CrNi18-10 reference specimens 197 HV and 209 HV, respectively. To study CE, the vibratory apparatus has been used and tests were conducted according to the ASTM G32 standard. Cavitation eroded surfaces were examined using a profilometer, optical and scanning electron microscopy. The research indicated that the CE resistance, expressed by the cumulative mass loss decreased in the following order C-NiCrSiB > A-NiCrSiB > X5CrNi18-10 > EN-GJL-200. Therefore, hardfacings were characterised by lower cumulative mass loss, in turn, higher CE resistance than the reference sample and therefore they may be applied as layers to increase resistance to cavitation of cast iron machine components. Results indicate that in the case of multiphase materials, hardness cannot be the main indicator for CE damage prediction while it strongly depends on the initial material microstructure. To qualitatively estimate the cavitation erosion damage (CEd) of NiCrSiB self-fluxing alloys at a specific test time, the following factors should be considered: material microstructure, physical and mechanical properties as well as surface morphology and material loss both estimated at specific exposure time. A general formula for the CEd prediction of NiCrSiB deposits was proposed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 4; 376-386
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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