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Wyszukujesz frazę "Zych, M" wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Investigations of the Influence of the Zone of Chills on the Casting Made of AlSi7Mg Alloy with Various Wall Thicknesses
Autorzy:
Piękoś, M.
Zych, J.
Powiązania:
https://bibliotekanauki.pl/articles/379681.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
thermal characteristics
cooling rate
AlSi7Mg alloy
chill
właściwości mechaniczne
charakterystyka termiczna
tempo schładzania
stop AlSi7Mg
Opis:
The influence of the chill on the AlSi7Mg alloy properties after the heat treatment T6, was realised in the system of the horizontally cast plate of dimensions 160x240 mm and thickness of 10 and 15 m. The cooling course in individual casting zones was recorded, which allowed to determine the solidification rate. Castings were subjected to the heat treatment T6 process. Several properties of the alloy such as: hardness BHN, density, tensile strength UTS, elongation %E were determined. The microstructure images were presented and the structural SDAS parameter determined. The performed investigations as well as the analysis of the results allowed to determine the influence zone of the chill. The research shows that there is a certain dependence between the thickness of the casting wall and the influence zone of the chill, being not less than 2g, where g is the casting wall thickness. The next aim of successive investigations will be finding the confirmation that there is the dependence between the casting wall thickness and the influence zone of the chill for other thicknesses of walls. We would like to prove that this principle is of a universal character.
Źródło:
Archives of Foundry Engineering; 2019, 1; 127-132
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany stanu powierzchni modeli drewnianych w procesie technologicznym wykonywania z zastosowaniem maszyn CNC
Changes of the Wooden Patterns Surface in Technological Execution Process with Using CNC Machines
Autorzy:
Waksmundzki, M.
Zych, J.
Powiązania:
https://bibliotekanauki.pl/articles/381397.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
model drewniany
chropowatość powierzchni
maszyna CNC
wooden pattern
roughness of surface
CNC machine
Opis:
W pracy przedstawiono wyniki badania stanu powierzchni modeli drewnianych wykonywanych przy użyciu frezarek CNC. Badaniami objęto drewno sosnowe i olchowe, które stanowią podstawowe gatunki wykorzystywane w modelarstwie odlewniczym. Powierzchnia uzyskiwana po obróbce charakteryzuje się stosunkowo dużą chropowatością, którą związana jest z szybkością posuwu, średnicą freza, kierunkiem ruchu narzędzia w stosunku do kierunku ułożenia słojów. Cechą powierzchni po obróbce jest jej falisty i powtarzalny profil przekroju. W badaniach wykazano, iż kolejne zabiegi technologiczne w obróbce modeli, szpachlowanie, szlifowanie i malowanie podwyższają gładkość powierzchni. Wykazano również, iż relacja: kierunek ruchu freza/kierunek ułożenia słojów odgrywa istotną rolę w kształtowaniu końcowej jakości powierzchni modeli. Ta tendencja jest wyraźniejsza w przypadku stosowania drewna sosnowego o silniej anizotropowej budowie.
The work shows the results of a study of patterns surface roughness made of wood using CNC. The studies covered pine wood and alder wood, which constitute the principal species used in Foundry. The surface obtained after treatment is characterized by relatively large, some roughness which is linked to the rate of feed which is linked to the rate of feed. A feature of the surface after treatment is its sinuous and repeatable profile section. In studies it has been shown that the next technological treatments adapted in treatment patterns as filling, sanding and painting enhance the smoothness of the surface. It has been shown that the direction of movement relationship milling grain direction plays an important role in shaping the final surface quality patterns. This trend is more pronounced in the case of pine wood with stronger anisotropic grades.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4 spec.; 139-142
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Problem of Assessing the Graphitizing Abilities of Near-eutectic Cast Iron - Basic Cast Iron for Modification
Autorzy:
Zych, J.
Myszka, M.
Snopkiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/2079792.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eutectic cast iron
graphitizing
ultrasonic method
żeliwo eutektyczne
grafityzacja
metoda ultradźwiękowa
Opis:
Cast iron destined for spheroidization is usually characterized by a near-eutectic chemical composition, which is a result of the necessity of maintaining its high graphitizing ability. This graphitizing ability depends mainly on the chemical composition but also on the so-called physical-chemical state. This, in turn, depends on the melting process history and the charge structure. It happens quite often, that at very similar chemical compositions cast irons are characterized by different graphitizing abilities. The hereby work concerns searching for the best method of assessing the graphitizing abilities of near-eutectic cast iron. The assessment of the graphitizing ability was performed for cast iron obtained from the metal charge consisting of 100% of special pig iron and for synthetic cast iron obtained from the charge containing 50% of pig iron + 50% of steel. This assessment was carried out by a few methods: wedge tests, thermal analysis, microstructure tests as well as by the new ultrasonic method. The last method is the most sensitive and accurate. On the basis of the distribution of the wave velocity, determined in the rod which one end was cast on the metal plate, it is possible to determine the graphitizing ability of cast iron. The more uniform structure in the rod, in which directional solidification was forced and which had graphite precipitates on the whole length, the higher graphitizing ability of cast iron. The homogeneity of the structure is determined by the indirect ultrasonic method, by measurements of the wave velocity. This new ultrasonic method of assessing the graphitizing ability of cast iron of a high Sc (degree of eutectiveness) and CE (carbon equivalent) content, can be counted among fast technological methods, allowing to assess the cast iron quality during the melting process.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 29-34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of Selected Properties of „Vari-Morph” (VM) Cast Iron by Means of the Graphite form Influence, Described by the Mean Shape Indicator
Autorzy:
Zych, J.
Myszka, M.
Kaźnica, N.
Powiązania:
https://bibliotekanauki.pl/articles/382206.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
VARI-MORPH cast iron
graphite shape indicator
heat fatigue
control of selected properties
żeliwo VARI-MORPH
wskaźnik kształtu
zmęczenie cieplne
kontrola wybranych właściwości
Opis:
The graphite form in cast iron is the structure parameter deciding on its all physical and mechanical properties. Three basic forms of graphite: flake, vermicular (compact) and nodular (spheroidal) are singled out in standard cast iron grades, without a heat treatment. Standards of individual grades of cast iron the most often allow only the homogeneous graphite form, sometimes with addition of 5÷10% of the other form. The interesting and - in the authors opinion - future-oriented material can constitute cast iron in which various forms of graphite are present, e.g. in comparative amounts: spherical and vermicular cast irons. Cast iron within which graphite occurs in two or three forms was named „Vari-Morph” (VM) cast iron, i.e. the one in which spherical and vermicular or vermicular and flake graphite occur in a wide range of proportions. The results of investigations of these new cast iron grades and their properties are presented in the hereby paper.
Źródło:
Archives of Foundry Engineering; 2019, 3; 43-48
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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