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    Wyświetlanie 1-5 z 5
    Tytuł:
    Effect of two-stage isothermal annealing on microstructure CuAl10Fe5Ni5 bronze with additions of Si, Cr, Mo, W and C
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380284.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    technological properties
    bronze alloy
    TTT curve
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości technologiczne
    stop brązu
    Opis:
    The aim of this study was to investigate the effect of a two-step isothermal annealing respectively at 1000 ˚C for 30 min, then at the range of 900÷450 ˚C increments 50 ˚C on the microstructure CuAl10 Ni5Fe5 bronze with additions of Si, Cr, Mo, W and C, cast into sand moulds. The study concerned the newly developed species, bronze, aluminium-iron-nickel with additions of Si, Cr, Mo, W and C. In order to determine the time and temperature for the characteristic of phase transitions that occur during heat treatment of the test method was used thermal and derivation analysis (TDA). The study was conducted on cylindrical test castings cast in the mould of moulding sand. It was affirmed that one the method TDA can appoint characteristic for phase transformations points about co-ordinates: τ (s), t (˚C), and to plot out curves TTT for the studied bronze with their use. It was also found that there is a five isothermal annealing temperature ranges significantly altering the microstructure of examined bronze.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 187-194
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Temperature on the Result of Complex Modification of IN-713C Superalloy Castings
    Autorzy:
    Binczyk, F.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/383137.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    glinek kobaltu
    makrostruktura
    Opis:
    The paper presents the results of research on the determination of the effect of pouring temperature on the macrostructure of the castings subjected to complex (surface and volume) modification and double filtration. Tested castings were made of post-production scrap (gating system parts) of IN-713C superalloy. Tests included the evaluation of the number of grains per 1 mm2, mean grain surface area, shape factor and tensile strength. Casting temperature below 1470 °C positively influenced the modification effect. The grains were finer and the mechanical properties increased, especially for castings with thicker walls. On the other hand, manufacture of thin walled castings of high quality require pouring temperature above 1480 °C.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 13-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the Influence of Additions on the Formation of Microstructure of Al-Zn-Mg-Cu Alloys
    Autorzy:
    Pisarek, B. P.
    Czekaj, E.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381528.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    Al-Zn-Mg-Cu alloy
    TDA method
    hardness HB
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop Al-Zn-Mg-Cu
    metoda ATD
    Opis:
    The article presents the investigations of 7xxx aluminium alloys performed by the method of thermal and derivational analysis. The studies made it possible to identify the effect of the changes in the Cu concentration, the total Zn and Mg weight concentrations and the Zn/Mg weight concentration ratio on their crystallization process: the cooling as well as the kinetics and dynamics of the thermal process of cooling and crystallization. Metallographic studies were performed on the microstructure of the examined alloys and their HB hardness was measured. The evaluation of the changes was presented in reference to the model alloys EN AW-7003 and EN AW-7010, whose microstructure under the conditions of thermodynamic equilibrium are described by the phase diagrams: Al-Zn-Mg and Al-Zn-Mg-Cu. The performed investigations confirmed that the hardness HB of the examined alloys is mainly determined by the reinforcement of the matrix αAl by the introduced alloy additions and the presence of phases Θ(Al2Cu) and S(Al2CuMg) rich in copper, as well as η(MgZn2), in the examined alloys' microstructure. The increase of the amount of intermetallic phases precipitated in the microstructure of the examined alloys is caused, beside Cu, by the characteristic change of Zn wt. concentration and Mg. It was proposed that the process of one-stage thermal treatment of the examined alloys be introduced at a temperature of up to tJ-20 °C, which will prevent the exceedance of the solidus temperature.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 39-44
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Modification of Cored, Thin Walled Castings of Nickel Superalloy IN-713C
    Autorzy:
    Binczyk, F.
    Cwajna, J.
    Gradoń, P.
    Mańka, M.
    Findziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/381063.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Innovative casting material
    innovative casting technology
    nickel alloy IN-713C
    surface modification
    cobalt aluminate
    macrostructure
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    stop niklu IN-713C
    modyfikacja powierzchni
    glinek kobaltu
    makrostruktura
    Opis:
    In current casting technology of cored, thin walled castings, the modifying coating is applied on the surface of wax pattern and, after the removal of the wax, is transferred to inner mould surface. This way the modification leading to grain refinement occur on the surface of the casting. In thin walled castings the modification effect can also be seen on the other (external) side of the casting. Proper reproduction of details in thin walled castings require high pouring temperature which intensify the chemical reactions on the mould – molten metal interface. This may lead to degradation of the surface of the castings. The core modification process is thought to circumvent this problem. The modifying coating is applied to the surface of the core. The degradation of internal surface of the casting is less relevant. The most important factor in this technology is “trough” modification – obtaining fine grained structure on the surface opposite to the surface reproduced by the core.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 17-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Home Scrap Content on the Service Life of Equipment Used in High Pressure Die Casting of AZ91 Alloy
    Autorzy:
    Konopka, Z.
    Łągiewka, M.
    Zyska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383091.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting material
    innovative casting technology
    automation of casting process
    mechanization of casting process
    guard of environment
    casthouse rigging
    magnesium alloy
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    automatyzacja procesu odlewniczego
    mechanizacja procesu odlewniczego
    ochrona środowiska
    stop magnezu
    Opis:
    The results of estimation of home scrap addition in charge influence on durability and wear of casting instrumentation life in the high-pressure casting technology using the hot chamber machine of alloy of AZ91 are presented. The wear of the following elements of the casting instrumentation so-called "casting set" as: syphon, plunger, sliding-rings, nozzle and injection moulding nozzle was estimated. A wear was estimated quantitative by registering the number of mould injections for different charges to the moment of element damage supervision. A damage had to be at such level that liquidated an element from further exploitation and necessary was an exchange on new or regeneration. In a final result allowed it the detailed determination of durability of the applied rigging elements in dependence on the type of the applied type of melt. It is noticed, that together with the increase of home-scrap participation in the charge wear of pressure machine instrumentation elements increases.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 173-176
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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