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Wyświetlanie 1-10 z 33
Tytuł:
Influence of Modification on the Structure and Morphology of Fracture of AlSi13Mg1CuNi
Autorzy:
Romankiewicz, R.
Romankiewicz, F.
Powiązania:
https://bibliotekanauki.pl/articles/382101.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silumin alloy
alloy modification
fracture
silumin
modyfikacja stopu
pękanie
Opis:
The investigation revealed that the modification of the AlSi13Mg1CuNi silumin with the additives 0,25% AlSr10 and AlCu19P1,4 simultaneously provided the change of the morphology of eutectic silicon from the lamellar into the fibrous one. The change resulted in a double increase in the impact resistance of the alloy and the widening of the plastic area of the fracture of the silumin samples.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 85-88
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Effect of Cr, Mo, V and W on the Selected Properties of Silumins
Autorzy:
Szymczak, T.
Szymszal, J.
Gumienny, G.
Powiązania:
https://bibliotekanauki.pl/articles/379895.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
statistical method
multicomponent silumin
pressure casting
właściwości mechaniczne
metoda statystyczna
silumin wieloskładnikowy
odlewanie ciśnieniowe
Opis:
The results of statistical analysis applied in order to evaluate the effect of the high melting point elements to pressure die cast silumin on its tensile strength Rm, unit elongation A and HB were discussed. The base alloy was silumin with the chemical composition similar to EN-AC 46000. To this silumin, high melting point elements such as Cr, Mo, V and W were added. All possible combinations of the additives were used. The content of individual high melting point additives ranged from 0.05 to 0.50%. The tests were carried out on silumin with and without above mentioned elements. The values of Rm, A and HB were determined for all the examined chemical compositions of the silumin. The conducted statistical analysis showed that each of the examined high melting point additives added to the silumin in an appropriate amount could raise the values of Rm, A and HB. To obtain the high tensile strength of Rm = 291 MPa in the tested silumin, the best content of each of the additives should be in the range of 0.05-0.10%. To obtain the highest possible elongation A of about 6.0%, the best content of the additives should be as follows: chromium in the range of 0.05-0.15%, molybdenum 0.05% or 0.15%, vanadium 0.05% and tungsten 0.15%. To obtain the silumin with hardness of 117 HB, chromium, molybdenum and vanadium content should be equal to about 0.05%, and tungsten to about 0.5%.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 77-82
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving Quality of the EN AC-43300 (AlSi9Mg) Alloy Destined for Castings of a Pump Casings
Autorzy:
Jarco, A.
Dudyk, M.
Płonka, S.
Powiązania:
https://bibliotekanauki.pl/articles/381768.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
hypoeutectic silumin
refining
ATD-AED method
właściwości mechaniczne
silumin podeutektyczny
rafinacja krzemu
metoda ATD AED
Opis:
Among non-ferrous alloys, the aluminum alloys have found the most widespread applications within foundry industry. Hypoeutectic silumin of the AlSi9Mg grade is commonly used for large, heavy duty machinery castings with complicated shape and high strength. From technical point of view, tendency to creation of coarse structure can be considered as a drawback of such alloy, what can have adverse effect on properties of the alloy. To obtain optimal structure of the castings and to assure improvement of their mechanical properties, the most effective treatment to perform is modification. Quality of performed modification treatment depends on proper dosing of inoculant and maintaining suitable temperature and time of keeping the alloy before pouring. In the paper are presented test results of crystallization course of refined and modified silumin of the EN AC–43300 (AlSi9Mg) grade, used in castings of pump casings. It has been determined an effect of performed processes of refining and modification on the mechanical properties (Rm, A5, HB and KCV), additionally, metallurgical tests of the alloy have been performed. Basing on analysis of obtained results, the most advantageous modification variant, which is suitable for castings of pump casings and complying with requirements of customers, has been selected.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 31-34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Vanadium and Molybdenum on the Crystallization, Microstructure and Properties of Hypoeutectic Silumin
Autorzy:
Szymczak, T.
Gumienny, G.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/382228.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
pressure die casting
multicomponent silumin
TDA method
teoria krystalizacji
odlewanie ciśnieniowe
silumin wieloskładnikowy
metoda ATD
Opis:
The paper presents the results of hypoeutectic silumin 226 grade and silumin produced on its basis through the addition of V and Mo. Vanadium and molybdenum were added as the preliminary alloy AlV10 and AlMo8 in an amount providing the concentration of 0.1; 0.2; 0.3 and 0.4% V and Mo. TDA curves of tested silumins were presented; regardless of the chemical composition there were similar thermal effects. Pressure castings microstructure research revealed the presence in silumins with the addition of V and Mo phases do not occur in silumin without these additives. These phases have a morphology similar to the walled, and their size increases with increasing concentration of V and Mo. The size of the precipitates of these phases silumin containing 0.1% V and Mo does not exceed 10 microns, while 0.4% of the content of these elements increases to about 80 microns. Tests of basic mechanical properties of silumins were carried out. It has been shown that the highest values of tensile strength Rm = 295 MPa and elongation A = 4.2% have silumin containing approximately 0.1% V and Mo. Increasing concentrations of these elements causes a gradual lowering of the Rm and A values.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 81-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Tungsten and Molybdenum on the Crystallization, Microstructure and Properties of Silumin 226
Autorzy:
Szymczak, T.
Gumienny, G.
Pacyniak, T.
Walas, K.
Powiązania:
https://bibliotekanauki.pl/articles/381984.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theoretical basis
casting process
pressure casting
multicomponent silumin
TDA method
podstawy teoretyczne
proces odlewania
odlewanie ciśnieniowe
silumin wieloskładnikowy
metoda ATD
Opis:
The work presents the results of the examinations of silumin 226 as well as a silumin produced on its basis containing a W and Mo addition introduced in the amount of 0.1; 0.2; 0.3 and 0.4% of both elements simultaneously. Investigations of the crystallization process of the silumins by the TDA method were conducted. Also, a microscopic analysis of their microstructure was performed and their basic mechanical properties were determined. Microstructure tests were made on casts produced in an TDA sampler as well as by the pressure method. The investigations exhibited a change in the course of crystallization of the silumin containing 0.3 and 0.4% W and Mo with respect to silumin 226 and the silumin with the addition of 0.1 and 0.2%. The presence of additional phases which did not occur in the case of lower addition contents was established in the silumin containing 0.3-0.4% W and Mo, regardless of the applied casting technology. The tests showed the possibility of increasing the tensile strength Rm, the proof stress Rp0,2 and the unit elongation A of the silumin as a result of a simultaneous introduction of the W and Mo addition. The highest values of Rm, Rp0,2 and A were obtained in the silumins with the additions of these elements within the range of 0.1-0.2% each.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 61-66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of parameters of high-pressure die casting on occurrence of casting nonconformities in sleeves of silumin alloy EN AB 47100
Autorzy:
Pałyga, Ł.
Stachowicz, M.
Granat, K.
Powiązania:
https://bibliotekanauki.pl/articles/352331.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high-pressure die casting
casting nonconformities
structure
silumin
microhardness
Opis:
The paper presents a research on the effect of extreme - for the technology of the considered silumin EN AB 47100 - parameters of high-pressure die casting on occurrence of casting nonconformities. Considered was influence of the way of assembling the mould cooled-down to 140-160°C, non-standard for the selected casting, and pouring temperature in the range of 705 to 720°C (higher than the recommended) of non-refined alloy. The castings were prepared with use of a high-pressure casting machine made by Kirov with mould closing force of 2500 kN. Occurrence of nonconformities was evaluated on properly prepared specimens taken from the castings manufactured with various parameters of the injection piston and various multiplication pressures. The results were subjected to quantitative and qualitative analyses of casting nonconformities and distribution of major alloying elements. It was found that proper selection of working parameters of the casting machine, in spite of disadvantageous pouring conditions, makes it possible to reduce occurrence of some casting defects, like shrinkage cavities and porosity, to improve tightness of castings even when the alloy refining process is omitted.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 1; 373-378
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research into morphology and phase structure in the surface of Al-Si alloy modified by yttrium oxide
Autorzy:
Zagulyaev, D.
Konovalov, S.
Gromov, V.
Melnikov, A.
Shlyarov, V.
Powiązania:
https://bibliotekanauki.pl/articles/201477.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silumin
microstructure
electroexplosive alloying
yttrium oxide
mikrostruktura
tlenek itru
Opis:
Using methods of physical material studies (scanning electron microscopy and micro X-ray spectral analysis), a study was carried out with focus on alteration of structure and phase composition in surface layers of Al-Si alloy (silumin АК10М2N) treated in electroexplosive alloying with a multiphase plasma jet formed in the process of aluminum foil explosion and carrying particles of Y2O3 weighted powder portion. It was revealed that a porous surface layer with non-homogeneously distributed alloying elements (silicon, yttrium) in it is formed in any conditions of electroexplosive alloying of silumin. Thickness of the modified layer is different, varying 50 to 160 μm, depending on the zone to be examined. The modified surface consists basically of Al, Si and Y. Yttrium in the modified layer is thought to be an indirect evidence of better physical and mechanical properties of the surface layer in comparison with the base material.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 173-177
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Water Mist Cooling on Microstructure of Hypereutectic Al-Si Alloy
Autorzy:
Władysiak, R.
Kozuń, A.
Powiązania:
https://bibliotekanauki.pl/articles/382973.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
casting die cooling
water mist
hypereutectic silumin
microstructure
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
chłodzenie
silumin nadeutektyczny
mikrostruktura
Opis:
The work is a continuation of research on the use water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation of crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled with water mist stream. The study was conducted for unmodified AlSi20 alloy and modified with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream allows the formation of the microstructure of hypereutectic silumins. A wide range of solidification temperature of hypereutectic silumins increases the potential impact of changes in the cooling rate on a size, a number and a morphology of preeutectic silicon and eutectic α+β (Al+Si).
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 117-122
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Casting Die Cooling on Solidification Process and Microstructure of Hypereutectic Al-Si Alloy
Autorzy:
Władysiak, R.
Kozuń, A.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/380676.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
casting die cooling
water mist
hypereutectic silumin
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
odlewanie kokilowe
mgła wodna
silumin nadeutektyczny
Opis:
The work is a continuation of research concerning the influence of intensive cooling of permanent mold in order to increase the casting efficiency of aluminium alloys using the multipoint water mist cooling system. The paper presents results of investigation of crystallization process and microstructure of synthetic hypereutectic alloys: AlSi15 and AlSi19. Casts were made in permanent mold cooled with water mist stream. The study was conducted for unmodified silumins on the research station allowing the cooling of the special permanent probe using a program of computer control. Furthermore the study used a thermal imaging camera to analyze the solidification process of hypereutectic silumins. The study demonstrated that the use of mold cooled with water mist stream allows in wide range the formation of the microstructure of hypereutectic silumins. It leads to higher homogeneity of microstructure and refinement of crystallizing phases and also it increases subsequently the mechanical properties of casting.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 175-180
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of the hypo-eutectic Al-Si alloys with an exothermic modifier
Modyfikacja podeutektycznych stopów Al-Si modyfikatorem egzotermicznym
Autorzy:
Lipiński, T.
Szabracki, P.
Powiązania:
https://bibliotekanauki.pl/articles/351945.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al alloys
modification
silumin
exothermic modifier
stopy Al
modyfikacja
modyfikator egzotermiczny
Opis:
Results of studies on the modification of AlSi7Mg alloy with an exotherimc modifier are presented in the paper. MgO, Cr2 O3, Na2O2, NaNO3, Na2MoO4 were used as modifiers in the amount of 0.05, 0.10, 0.15, 0.20 and 0.25%, and Cr2O3+Al, NaNO3+Al, Na2 MoO4 +Al were applied as exothermic modifiers with Al as the reducing agent in the amount of 0.04-0.3%. The analyzed modifiers were incorporated in line with factorial design 23. The Inmold modification method was applied. The microstructure of selected modified alloys was presented, and their tensile strength, percentage elongation and Brinell hardness number were given in graphic form. The results of the study indicate that the use of modifiers delivering an exothermic effect influences the effectiveness of silumin modification.
W pracy przedstawiono wyniki badań nad modyfikacja stopu AlSi7Mg modyfikatorem egzotermicznym. Do badań użyto, jako modyfikatorów związków MgO, Cr2 O3, Na2O2, NaNO3, Na2MoO4 wprowadzanych w ilości 0.05, 0.10, 0.15, 0.20 and 0.25% oraz w postaci modyfikatora egzotermicznego z Al jako reduktorem Cr2 O3+Al, NaNO3+Al i Na2 MoO4 +Al w ilości 0.04-0.3% wprowadzanych zgodnie z planem czynnikowym 23. Modyfikacje prowadzono metodą Inmold. Przedstawiono wybrane mikrostruktury stopu po modyfikacji oraz w postaci graficznej wytrzymałość na rozciąganie, wydłużenie procentowe i twardość Brinella. Wykazano, że zastosowanie modyfikatora w postaci mieszanki dającej efekt egzotermiczny wpływa na efektywność modyfikacji siluminu.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 2; 453-458
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 33

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