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Tytuł:
Badania efektów borowania laserowego elementów z żeliwa szarego
Results of the test of laser boronizing of machine elements made of gray cast iron
Autorzy:
Kinal, G.
Waligóra, W.
Powiązania:
https://bibliotekanauki.pl/articles/335610.pdf
Data publikacji:
2005
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
szare żeliwo
laserowe borowanie
technologia
mikrotwardość
zużycie tribologiczne
microhardness
gray cast iron
laser boronizing
machine element
tribological wearing
Opis:
W pracy przedstawiono badania zmierzające do opanowania technologii borowania laserowego elementów wykonanych z żeliwa szarego. Warstwy powierzchniowe wykonane tą technologią cechują się znaczną mikrotwardością i tym samym dużą odpornością na zużycie tribologiczne.
This paper presents the research on establishing a laser boronizing technology of machine elements made of gray cast iron. Significant microhardness and following high tribological resistance are characteristic for surface layers created with the use of this technology.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2005, 50, 2; 54-58
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Brake Disc Castings Day by Day
Autorzy:
Dudzik, B.
Powiązania:
https://bibliotekanauki.pl/articles/380245.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gray iron
rotor
natural frequency
żeliwo szare
wirnik
częstości własne
Opis:
In the paper are presented results of the project of Foundry R&D department made in Brembo. Present paper focuses on the changes of some characteristics of casted rotors with time and temperature. Possible correlation with other well-known parameters which are commonly used for daily castings quality measurement, like mechanical properties are also considered.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Structure on Thermal Power of Cast-iron Heat Exchangers
Autorzy:
Mróz, M.
Orłowicz, A. W.
Tupaj, M.
Jacek-Burek, M.
Radoń, M.
Kawiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/382256.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat exchanger
gray cast iron
thermal power
wymiennik ciepła
żeliwo szare
ciepło
Opis:
The objective of the study reported in this paper was to determine the effect of structure on thermal power of cast-iron heat exchangers which in this case were furnace chambers constituting the main component of household fireplace-based heating systems and known commonly as fireplace inserts. For the purpose of relevant tests, plate-shaped castings were prepared of gray iron with flake graphite in pearlitic matrix (the material used to date typically for fireplace inserts) as well as similar castings of gray cast iron with vermicular graphite in pearlitic, ferritic-pearlitic, and ferritic matrix. For all the cast iron variants of different structures (graphite precipitate shapes and matrix type), calorimetric measurements were carried out consisting in determining the heat power which is quantity representing the rate of heat transfer to the ambient environment. It has been found that the value of the observed heat power was affected by both the shape of graphite precipitates and the type of alloy matrix. Higher thermal power values characterize plate castings of gray iron with vermicular graphite compared to plates cast of the flake graphite gray iron. In case of plates made of gray cast iron with vermicular graphite, the highest values of thermal power were observed for castings made of iron with ferritic matrix.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 27-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality evaluation of iron casting EN-GJL-200 produced on the disamatic line
Autorzy:
Boroń, K.
Powiązania:
https://bibliotekanauki.pl/articles/105726.pdf
Data publikacji:
2018
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
grey cast iron
casting defects
sand mould
żeliwo szare
wady odlewów
forma piaskowa
Opis:
This article discusses the issues concerning the quality of casting surface with a small unit weight manufactured on the Disamatic automatic casting lines in a flaskless mould with a vertical parting line. The research was conducted in manufacturing conditions in one of the casting facilities in the country. The identification of casting defects for a monthly manufacturing cycle was made and agreed that the main causes of scrap casting are defects on the raw surface: lumps of moulding sand which after removal form cavities and draws as well as defects of gas origin such as blowholes. There are also defects of form namely short runs. In the later part of the work, the research results of the properties of moulding sand were presented and casting defects were selected the occurrence of which is connected with the quality of moulding sands.
Źródło:
Acta Innovations; 2018, 29; 36-40
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inoculation of grey cast iron with master alloys containing strontium and zirconium
Autorzy:
Soiński, M. S.
Jędrecki, P.
Grzesiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/383343.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solidification process
cast iron
inoculation
mechanical properties
proces krzepnięcia
żeliwo szare
właściwości mechaniczne
Opis:
The effectiveness of cast iron inoculation performed by means of three various inoculants: FeSiSr–SYSTR 75 AV, FeSiZr–SYZR 25 AV and Zircinoc was determined. The inoculants were introduced to the cast iron during the pouring of production moulds. Examination of cast iron structure and mechanical properties were carried out for specimens cut out of the collars of the cast valve bodies. It was found that the quantity of eutectic cells increased to the greatest degree if FeSiZr–SYZR 25 AV inoculant was applied in quantities of 0.20% or 0.25%. This inoculant in the mentioned quantities also increases the tensile strength to the greatest degree, rising it to the level of 250-265 MPa.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 195-198
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Selected Geometry Parameter of Titanium Spatial Insert on the Surface Layer Formation on Grey Cast Iron
Autorzy:
Dziwoki, G.
Dulska, A.
Szajnar, J.
Król, M.
Powiązania:
https://bibliotekanauki.pl/articles/379470.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grey cast iron
Titanium
Carbides
layered casting
insert
żeliwo szare
tytan
węgliki
odlewanie warstwowe
Opis:
The paper presents a method of producing a grey cast iron casting locally reinforced with a titanium insert printed using SLM method (Selective Laser Melting). This article attempts to examine the impact of the selected geometry of titanium spatial insert on the surface layer formation on grey cast iron. The scope of the research focuses on metallographic examination - observation and analysis of the structure of the reinforced surface layer on a light and scanning microscope and a hardness measurement of the titanium layer area. Based on the obtained results, it was concluded that the reaction between titanium insert and metal (grey cast iron) locally develops numerous carbides precipitation (mainly TiC particles), which increases the hardness of the reinforced surface layer and local strengthening of the material. The ratio between the thickness of the support part (grey cast iron) and the working part (titanium insert) affects the resulting layers connection structure. The properties of the obtained reinforced surface layer depend mainly on the geometry of the insert (primarily on the internal dimensions of the connector) and the volume of the casting affecting the re-melting of the insert. A more concentrated structure of carbides precipitation occurs in castings with a full connector insert.
Źródło:
Archives of Foundry Engineering; 2019, 1; 58-62
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preconditiong and Inoculation of Low Sulphur Grey Iron
Autorzy:
Hossain, Md Sojib S.
Bazlur B. Rashid, A. K. M.
Powiązania:
https://bibliotekanauki.pl/articles/380548.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grey iron
metallography
mechanical properties
cementite
preconditioner
inoculant
żeliwo szare
metalografia
właściwości mechaniczne
cementyt
Opis:
For quality grey cast iron production, the challenging issues are to avoid cementite structure and obtain the desired graphite morphology with proper matrix as well as hardness. The objective of the present research is to find out the right combination of preconditioner and inoculant that may help to overcome the challenges. In this work, sulphur content is kept low (0.01%). Two preconditioners namely metallurgical SiC and zirconium bearing FeSi with two types of inoculant are individually used to make four combinations of sample and for each case metal is poured into the green sand mould. Finally Brinell hardness and graphite morphology is observed in the thickest and thinnest portions of the castings. Metallurgical SiC with barium bearing inoculant gives better graphite morphology and hardness than strontium bearing inoculant, on the other hand zirconium bearing FeSi gives more satisfying result than SiC with every type of inoculant. Among all of the combinations Zr bearing preconditioner with Ba bearing inoculant gives good graphite morphology with best mechanical properties in both thickest and thinnest portions of the casting.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 61-66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of Coatings on Grey Cast Iron Fabricated by Hot-dipping in Pure Al, AlSi11 and AlTi5 Alloys
Autorzy:
Mola, R.
Bucki, T.
Wcisło, K.
Powiązania:
https://bibliotekanauki.pl/articles/381108.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hot-dip aluminizing
coatings
grey cast iron
intermetallic phases
microstructure
powłoki
żeliwo szare
mikrostruktura
Opis:
Flake graphite cast iron was hot-dip coated with pure aluminium or aluminium alloys (AlSi11 and AlTi5). The study aimed at determining the influence of bath composition on the thickness, microstructure and phase composition of the coatings. The analysis was conducted by means of an optical microscope and a scanning electron microscope with an EDS spectrometer. It was found that the overall thickness of a coating was greatly dependent on the chemical composition of a bath. The coatings consisted of an outer layer and an inner intermetallic layer, the latter with two zones and dispersed graphite. In all the cases considered, the zone in the inner intermetallic layer adjacent to the cast iron substrate contained the Al5Fe2 phase with small amount of silicon; the interface between this phase and the cast iron substrate differed substantially, depending on the bath composition. In the coatings produced by hot-dipping in pure aluminium the zone adjacent to the outer layer had a composition similar to that produced from an AlTi5 bath, the Al3Fe phase was identified in this zone. The Al3Fe also contained silicon but its amount was lower than that in the Al5Fe2. In the coatings produced by hot-dipping in AlSi11, the zone adjacent to the outer layer contained the Al3FeSi phase. The analysis results showed that when AlSi11 alloy was applied, the growth mode of the inner layer changed from inwards to outwards. The interface between the Al5Fe2 phase and the cast iron substrate was flat and the zone of this phase was very thin. Locally, there were deep penetrations of the Al5FeSi phase into the outer layer, and the interface between this phase and the outer layer was irregular. Immersion in an AlTi5 bath caused that the inner intermetallic layer was thicker than when pure aluminium or AlSi11 alloy baths were used; also, some porosity was observed in this layer; and finally, the interface between the inner layer and the cast iron substrate was the most irregular.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1; 85-90
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of iron powder and disintegrated steel scrap additives on the solidification of cast iron
Wpływ dodatku proszku żelaza oraz rozdrobnionego złomu stalowego na krystalizację żeliwa
Autorzy:
Kopyciński, D.
Dorula, J.
Powiązania:
https://bibliotekanauki.pl/articles/264035.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
modyfikacja
żeliwo szare
dendryty
struktura
własności mechaniczne
inoculation
cast iron
dendrites
structure
mechanical properties
Opis:
The study proves that by introducing the iron powder and disintegrated steel scrap to low-sulphur cast iron still before the inoculation carried out with a conventional graphitising inoculant, the mechanical properties similar to those obtained during the inoculation treatment carried out on cast iron with the recommended high sulphur content are achieved. The said operation increases the number of crystallisation nuclei for dendrites of the primary austenite. In this case, the iron particles act as substrates for the nucleation of primary austenite gp due to a similar crystallographic behaviour of the regular face centered cubic lattice The more numerous are the dendrites of primary austenite, the less free space is available in the interdendritic spaces for the formation of graphite eutectic grains, which makes the structure more refined (more eutectic grains) and the mechanical properties higher.
W pracy wykazano, że wprowadzenie do żeliwa o niskiej zawartości siarki, jeszcze przed zabiegiem modyfikowania tradycyjnym modyfikatorem grafityzującym, proszku żelaza i/lub złomu stalowego w postaci rozdrobnionej, prowadzi do otrzymania podobnych właściwości wytrzymałościowych jak przy zabiegu modyfikowania dla żeliwa o zalecanej wyższej zawartości siarki. Zabieg ten zwiększa liczbę zarodków krystalizacji dendrytów austenitu pierwotnego. W tym przypadku cząstki żelaza spełniają rolę podkładek do zarodkowania austenitu pierwotnego ϒp wskutek podobieństwa krystalograficznego sieci regularnej (ściennie centrowanej). Im większa liczba dendrytów austenitu pierwotnego, tym mniej miejsca w przestrzeniach międzydendrytycznych na kształtowanie się ziaren eutektyki grafitowej, a w efekcie nieco drobniejsza struktura (większa liczba ziaren eutektycznych) oraz większe wartości właściwości wytrzymałościowych.
Źródło:
Metallurgy and Foundry Engineering; 2010, 36, 2; 97-104
1230-2325
2300-8377
Pojawia się w:
Metallurgy and 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:
Designing of X46Cr13 Steel Heat Treatment in Condition of Casting Mould
Autorzy:
Przyszlak, Natalia
Piwowarski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/27314161.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
layered casting
bimetal
high chromium steel
grey cast iron
odlew warstwowy
stal wysokochromowa
żeliwo szare
Opis:
The paper presents issues related to the technology of layered castings manufactured in the system: working part made of high-chromium steel X46Cr13 - base part made of gray cast iron with flake graphite, using the mould cavity preparation technology. Considering the high hardenability of the above-mentioned steel grade, the aim of the research was to optimize the casting parameters of gray cast iron in such a way that it would be possible to perform heat treatment of X46Cr13 steel directly in the casting mould. As part of the research, the geometry of the working and base parts of layered castings was selected, and guidelines for mould technology from the point of view of the moulding sand were developed. In order to control the cooling rate, three matrix of the moulding sand were used - quartz sand, chromite sand and silicon carbide, with the same granularity. The thermal conductivity coefficient of sands made on selected matrix, bound with synthetic resin in the ratio of 30:1, was experimentally determined. Then, the bimetal casting process in a given mass was simulated in the MagmaSoft® (ver. 5.4.1). The purpose of the simulation was to determine the maximum virtual temperature Tm in the thermal center of the outer surface of the X46Cr13 steel insert. From the point of view of the research purpose, the insert was expected to heat up to the austenitization temperature, i.e. at least 950°C.
Źródło:
Archives of Foundry Engineering; 2023, 23, 2; 119--126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grey cast iron as construction material of bridges from the 18th and 19th century
Autorzy:
Pękalski, G.
Rabiega, J.
Powiązania:
https://bibliotekanauki.pl/articles/379865.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metallography
bridge construction
grey cast iron
mechanical properties
metalografia
konstrukcja mostu
żeliwo szare
właściwości mechaniczne
Opis:
Many bridges and railroad viaducts, which have been operated at the western and southern regions of Poland, were erected at the end of the 18th or beginning of the 19th century. In recent years they undergo overhauls and renovations requiring familiarity with the construction materials they have been made of. It is necessary for estimation of their load capacity (possible reinforcements) and determining their suitability for further utilisation. Among the materials in the old bridges the puddled steels and cast irons predominate. Aim of the work is identification and documentation of microstructure and selected properties of the cast irons used for production of parts for the bridge in Łażany, the Old Mieszczański Bridge in Wrocław, the hanging bridge in Ozimek, as well as the columnar piers of the railroad viaduct in Wrocław. Using the methods of light microscopy and scanning electron microscopy, as well as the results of hardness measurements and chemical analysis, it has been shown that the objects have been built of grey cast iron with flake graphite having the ferritic-pearlitic or pearlitic matrix. The diversification of their chemical analysis resulting from the type, size and geometry of the cast parts was indicated. The tested materials fulfil requirements of the contemporary standards related to grey cast irons of the EN-GJL-100 and EN-GJL-150 grades.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 175-179
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increasing of Utility Properties of Grey Cast Iron Castings with Heat Treatment
Autorzy:
Eperješi, Š.
Malik, J.
Vasková, I.
Fecko, D.
Powiązania:
https://bibliotekanauki.pl/articles/380865.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grey cast iron
heat treatment
hardening capacity
austenite
martensite
żeliwo szare
obróbka cieplna
austenit
martenzyt
Opis:
Grey cast iron belongs to materials for casting production, which have wide application for different industry branches. Wide spectrum of properties of these materials is given by the structure of base metal matrix, which can be influenced with heat treatment. Processes of annealing can be applied for grey cast iron without problems. During heat treatment processes, where higher cooling rates are used, the thermal and structural strains become important. Usage and conditions of such heat treatment for grey cast iron castings of common production are the subject of evaluation of this article.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2; 13-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Shape of Graphite Precipitates on the Cast Iron Abrasion Resistance
Autorzy:
Jakubus, A.
Soiński, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/381926.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nodular cast iron
vermicular cast iron
grey cast iron
abrasion resistance
żeliwo sferoidalne
żeliwo wermikularne
żeliwo szare
odporność na ścieranie
Opis:
The paper presents the initial results of investigation concerning the abrasion resistance of cast iron with nodular, vermicular, or flake graphite. The nodular and vermicular cast iron specimens were cut out of test coupons of the IIb type with the wall thickness equal to 25 mm, while the specimens made of grey cast iron containing flake graphite were cut out either of special casts with 20 mm thick walls or of the original brake disk. The abrasion tests were carried out by means of the T-01M tribological unit working in the pin-on-disk configuration. The counterface specimens (i.e. the disks) were made of the JT6500 brand name friction material. Each specimen was abraded over a distance of 4000 m. The mass losses, both of the specimens and of the counterface disks, were determined by weighting. It was found that the least wear among the examined materials was exhibited by the nodular cast iron. In turn, the smallest abrasion resistance was found in vermicular cast iron and in cast iron containing flake graphite coming from the brake disk. However, while the three types of specimens (those taken from the nodular cast iron and from grey cast iron coming either from the special casts or from the brake disk) have almost purely pearlitic matrix (P95/Fe05), the vermicular cast iron matrix was composed of pearlite and ferrite occurring in the amounts of about 50% each (P50/Fe50). Additionally, it was found that the highest temperature at the cast iron/counterface disk contact point was reached during the tests held for the nodular cast iron, while the lowest one occurred for the case of specially cast grey iron.
Źródło:
Archives of Foundry Engineering; 2019, 4; 87-90
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Successive Stages of the Melting Process on the Nucleation of Ductile Cast Iron
Autorzy:
Kołakowski, Jakub
Brzeżański, Mateusz
Burdzy, Daniel
Sobieraj, J.
Urbanowicz, M.
Paruch, T.
Janerka, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/27314118.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
grey cast iron
ductile cast iron
inoculation
DTA
eutectic temperature
nucleation
żeliwo szare
żeliwo sferoidalne
inokulacja
temperatura eutektyczna
ziarna
Opis:
The article discusses issues related to the melting of grey and ductile cast iron in terms of metallurgical quality. The derivative and thermal analysis (DTA) was used to assess this quality. The article presents the results of research carried out in industrial conditions and analysed by the Itaca system. In the paper, the effect of the furnace type, the charge materials and the inoculation process on the parameters characterising the cast iron being melted was analysed. The most important of these are the minimum eutectic temperature (Temin), the liquidus temperature (Tliquidus) and the nucleation rate. The results of the research and calculations are shown in graphs and as dependencies. Some of DTA results were compared to the microstructure analysis results. The article shows that the derivative and thermal analysis is a very effective tool in the assessment of the metallurgical quality of cast iron. It is a very good addition to chemical analysis. Based on the results of the research, it was concluded that a very high correlation exists between the rate of nucleation (DTA) and the number of graphite nuclei (microstructure analysis). Furthermore, it was also found that an improvement in nucleation could be achieved by ensuring a high value of carbon equivalent (CE) and, above all, by conducting the primary and secondary inoculation processes, respectively.
Źródło:
Archives of Foundry Engineering; 2023, 23, 1; 61--67
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 43

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