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Wyszukujesz frazę "graphite shape" wg kryterium: Temat


Wyświetlanie 1-6 z 6
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
Tytuł:
Correlation between shape factor and mechanical properties of graphitic cast irons
Autorzy:
Vasko, A.
Vasko, M.
Powiązania:
https://bibliotekanauki.pl/articles/973009.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
shape factor
cast iron
graphite
microstructure
mechanical properties
współczynnik kształtu
żeliwo
grafit
mikrostruktury materiałów
właściwości mechaniczne
Opis:
The evaluation of shape factor (circularity) is a subject of interest in many fields of applications such as medicine and industrial processes. The shape factor plays an important role in materials science as a way to understand the relationship between microstructure and mechanical properties of technical materials. The paper deals with measurement of shape factor of graphitic particles with the aim to understand the influence of microstructure (especially shape of graphite) on mechanical properties of graphitic cast irons.
Źródło:
Production Engineering Archives; 2016, 11, 2; 11-14
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of Microstructure of Grey Cast Irons by Electrical Resistivity Measurements
Autorzy:
Petrič, M.
Mrvar, P.
Kastelic, S.
Powiązania:
https://bibliotekanauki.pl/articles/354044.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solidification
grey cast iron
electrical resistivity
graphite shape
microstructure
Opis:
The paper describes the influence of graphite shape, size and amount to electrical properties of different cast irons. Experiments of electrical resistivity measurements were conducted during solidification of four different melts in different time intervals from melt treatment by inoculation and nodularization. Metallographic analyses were made in order to determine the shape, size, distribution and amount of graphite and correlate results with electrical resistivity measurements. It was found out that nodular graphite is giving the lowest electrical resistivity and is decreased during solidification. Electrical resistivity of lamellar cast iron is increased during solidification since lamellas interrupt metal matrix severely. There is no significant difference in resistivity of vermicular cast iron from nodular cast iron. Smaller size of graphite and lower amount of graphite and higher amount of metal matrix also decrease resistivity.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 365-369
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous modification of cast iron by the FLOTRET method
Autorzy:
Hanus, A.
Hanusová, P.
Powiązania:
https://bibliotekanauki.pl/articles/380281.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
rozwój produktu
żeliwo sferoidalne
metoda FLOTRET
innovative foundry technologies
innovative foundry materials
product development
cast iron
spheroidal graphite
modification of graphite shape
FLOTRET method
Opis:
Increasing demands on the utility properties of materials used for castings have led to the production of cast iron with a modified shape of graphite, where the required properties are achieved by a change in graphite shape, its size and layout, and a change in the basic structure of the metal. This paper is focused on the continuous method of producing spheroidal graphite FLOTRET. In the introductory section is summarized the theoretical foundations of the secondary treatment of cast irons, especially the FLOTRET flow method, describes the advantages and disadvantages of the method. The practical part is divided into laboratory and operational tests. Laboratory experiments were conducted on a laboratory-type modifier FLOTRET chamber, which was designed and hydraulically optimized. Experiments were focused on the effects of pressure altitude and amount of modifier on the residual values of magnesium, as conditions for a successful modification. The method was tested in two foundries under operating conditions and in one of them was observed a long-term modification process.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 43-48
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Graphite Shape in Cast Iron Obtaining by Inmold Process
Autorzy:
Gumienny, G.
Kurowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/381705.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
inmold process
graphite shape
teoria krystalizacji
technologia inmold
żeliwo sferoidalne
Opis:
The paper presents results of research on the effect of magnesium on the graphite shape in cast iron obtained by Inmold process. For testing Lamet® 5504 master alloy was used. The crystallization process of cast iron with various Mg concentrations was evaluated with use of the thermal and derivative analysis (TDA) method. The conditions were demonstrated for which a flake, vermicular and nodular graphite were obtained. Values of graphite “c” coefficient were analyzed. Results from it the significant differences between the assessment of the graphite on metallographic specimen and by the "c" coefficient. An effect of wall thickness of the casting on the graphite coefficient was indicated.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 15-20
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Structural Parameters - the Shape of Graphite and Matrix on Change of Ultrasonic Wave Propagation Rate and Value of Attenuation in Graphitic Cast Irons
Autorzy:
Belan, Juraj
Tillová, Eva
Uhríčik, Milan
Pastierovičová, Lucia
Powiązania:
https://bibliotekanauki.pl/articles/26081550.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
badanie ultradźwiękowe
zapewnienie jakości żeliwa
grafitowy kształt
współczynnik perlitu i ferrytu
ultrasonic investigation
quality assurance of cast iron
graphite shape
pearlite and ferrite ratio
quantitative evaluation of graphite and matrix
Opis:
Despite the tendency of the current industry, especially the automotive industry, it is to use modern, light and super-strong materials based on Al or HSLA steels, the application of classic materials such as cast iron still makes sense, especially concerning price and excellent castability. The article presents one of the possible ways of using the ultrasonic non-destructive method in quality control and simpli-fication of the identification of the type of cast iron concerning the change of parameters of ultrasound propagation in materials. The main criteria for assessing the quality and determining the type of graphite cast iron were considered to be the rate of propagation of ultrasound - cL and the value of attenuation , which vary depending on the shape of the graphite and matrix. Graphitic cast irons with different graphite shapes (lamellar, vermicular, and globular shapes) and a matrix with different ferrite/perlite ratios were used as experimental material. Along with the ultrasonic tests, a metallographic analysis was also performed to quantify the microstructure of cast irons.
Źródło:
Production Engineering Archives; 2023, 29, 1; 23--27
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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