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Wyszukujesz frazę "iron foundry" wg kryterium: Temat


Tytuł:
An innovative and environmentally safe method to manufacture high-quality iron castings for possible use as elements of agricultural machines
Innowacyjna i ekologiczna metoda wykonywania odlewow z zeliwa wysokojakosciowego z mozliwoscia wykorzystania w elementach maszyn rolniczych
Autorzy:
Pytel, A.
Stefanski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/792844.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
ductile iron
vermicular graphite cast iron
foundry model
filter
inoculant
spheroidization
agricultural casting
agricultural machine
Opis:
The article presents the experience related with the manufacture of utility castings poured in bentonitebonded sands on a pilot stand. The technological guidelines were presented for the ductile iron castings weighing 40 kg and 10 kg. For individual castings, the mould technology has been developed, cross-sections of the gating and feeding systems were calculated, and pilot pattern equipment was designed. The results of mechanical tests and structure examinations were discussed. The work will continue within the framework of the project No. POIG.01.03.01-12-061/08-00. The technology currently developed relates to high-quality cast iron with spheroidal and vermicular graphite without and with the addition of alloying elements, including also the grade resistant to thermal fatigue. The idea is to simplify the methods used so far for the manufacture of cast iron subjected to spheroidisation or vermicularisation in a ladle and replace them with an inmould treatment. These steps are expected to improve the ecological conditions, reduce the fume and glare effects related with magnesium treatment, and improve the process economics. The innovative method, discussed in this work and developed further under the above mentioned project, can be successfully used for casting various elements of the agricultural machinery, resulting in increased mechanical properties of the cast elements, longer life on performance and improved magnesium recovery.
W artykule przedstawiono doświadczenia wykonania odlewów użytkowych w formach w masach bentonitowych na stanowisku doświadczalnym. Zaprezentowano założenia technologiczne dla odlewów z żeliwa sferoidalnego o masie 40 kg i 10 kg. Dla poszczególnych odlewów opracowano technologię formy, obliczono przekroje układu wlewowego i zasilającego wykonano omodelowanie próbne. Omówiono rezultaty przeprowadzonych prób, wytrzymałości materiału odlewów i jego struktury. Prace są w dalszym ciągu kontynuowane w ramach prowadzonego projektu: POIG.01.03.01-12-061/08-00. Rozwijana obecnie technologia dotyczy żeliwa wysokojakościowego sferoidalnego i wermikularnego bez dodatków pierwiastków stopowych, jak również z dodatkiem pierwiastków stopowych, także odpornego na zmęczenie cieplne. Ideą zagadnienia jest uproszczenie dotychczasowych metod wytwarzania odlewów z żeliwa poddawanego procesowi sferoidyzacji lub wermikularyzacji w kadzi i zastąpienie procesem sferoidyzacji w formie odlewniczej. Dzięki temu poprawiają się warunki ekologiczne, ograniczone są efekty zadymienia i efekty pirotechniczne związane z reakcją magnezu a także ekonomiką procesu. Omówiona w pracy i rozwijana innowacyjna metoda również w projekcie może był z powodzeniem wykorzystana do odlewania różnych elementów maszyn rolniczych powodując zwiększenie właściwości wytrzymałościowych odlewnych elementów, trwałości a także zwiększenia uzysku magnezu w prowadzonym procesie.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11C
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza bezpieczeństwa pracy w odlewni żeliwa na przykładzie wybranej odlewni żeliwa
Safety analysis of the job in iron foundry on the example of a selected iron foundry
Autorzy:
Wieliczka, B.
Powiązania:
https://bibliotekanauki.pl/articles/109043.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
bezpieczeństwo i higiena pracy
odlewania żeliwa
zalewacz piecowy
ocena ryzyka zawodowego
środki zapobiegawcze
Occupational Health and Safety
iron foundry
pourer
risk assessment
preventive measures
Opis:
Zdrowie i życie ludzkie jest najcenniejszą rzeczą jaką człowiek posiada, priorytet o który należy dbać nieustannie. W procesie produkcyjnym człowiek jest najistotniejszym elementem, jego bezpieczeństwo powinno być najważniejsze dla pracodawcy. Poprawa warunków środowiska pracy, które stwarzają zagrożenie dla pracownika powinny być cały czas minimalizowane tak aby nie stanowiły żadnego zagrożenia. W przypadku niemożności niwelizacji czynników szkodliwych, uciążliwych i niebezpiecznych do granicy minimalnej, z pomocą przychodzą środki ochrony indywidualnej. Środki te mają za zadanie chronić pracownika w sposób komfortowy co wynika z ich kompatybilności. Aby móc wykonać powyżej opisane działania, pierwszym krokiem jest identyfikacja zagrożeń występujących w przedsiębiorstwie wraz z przeprowadzeniem oceny ryzyka zawodowego. Podstawowym celem tego artykułu jest przedstawienie analizy bezpieczeństwa pracy w odlewni żeliwa na stanowisku zalewacza piecowego w oparciu o ocenę ryzyka zawodowego.
Health and human life is the most valuable thing a person has, a priority to be constantly looked after. In the production process, man is the most important element, its safety should be the most important for the employer. Improvement of working environment conditions that pose a threat to the employee should be minimized so as not to pose any threat. If it is not possible to eliminate harmful, arduous and dangerous factors up to the minimum limit, personal protection measures help. These measures are designed to protect the employee in a comfortable manner, which results from their compatibility. In order to be able to perform the above described activities, the first step is to identify hazards occurring in the enterprise along with carrying out a risk assessment. The main purpose of this article is to present an analysis of work safety in a cast iron foundry on a furnace pouring stand based on a risk assessment.
Źródło:
Archiwum Wiedzy Inżynierskiej; 2018, 3, 2; 26-29
2544-2449
Pojawia się w:
Archiwum Wiedzy Inżynierskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza stanu naprężeń w konstrukcjach odlewu korpusu, pokrywy i klina zasuw klinowych do gazu
Analysis of the state of stress in cast bodies, covers and wedges of the wedge gate valves used in gas networks
Autorzy:
Gwiżdż, A.
Żuczek, R.
Nowak, M.
Powiązania:
https://bibliotekanauki.pl/articles/391680.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
komputerowe wspomaganie produkcji odlewniczej
symulacja rozkładu naprężeń
armatura żeliwna
computer-aided foundry production
simulation of stress distribution
cast iron fittings
Opis:
Przeprowadzono analizę numeryczną rozkładu naprężeń eksploatacyjnych w zasuwach miękko uszczelnionych do sieci gazowych z rur PE odlewanych z żeliwa sferoidalnego EN-GJS-400-15. Analiza przeprowadzona została z wykorzystaniem systemu ANSYS, na podstawie danych i dokumentacji dotyczącej rzeczywistych warunków próby, przeprowadzanych w Fabryce Armatur JAFAR SA. Zastosowanie oprogramowania ANSYS pozwoliło na zintegrowanie analiz numerycznych opracowanej konstrukcji wirtualnej, obciążanej ciśnieniem próby, z reakcją rzeczywistej konstrukcji w trakcie prób laboratoryjnych prowadzonych na stanowisku do analizy szczelności, wraz z możliwością weryfikacji wyników wirtualnych i rzeczywistych. W niniejszej publikacji przedstawiono wyniki analizy dla zaworów DN50 i DN150. Wyniki tej analizy wykorzystane będą do weryfikacji konstrukcji odlewów wchodzących w skład modeli zasuw klinowych, poprzez poprawki wymiarowe konstrukcji.
Numerical analysis was carried out to establish the operating stress distribution in soft-sealed gate valves cast from ductile iron EN-GJS-400-15 for the gas network of PE pipes. The analysis was carried out with ANSYS software, based on data and documentation of actual test conditions used at the JAFAR SA Fittings Factory. The use of ANSYS software allowed integration between the results of numerical analysis of the developed virtual structure loaded with test pressure and the response of real structure obtained during laboratory tests carried out on a stand for pressure leak testing, with further possibility of a verification of the results, both virtual and real. This publication presents the results of the analysis carried out on DN50 and DN150 gate valves. Through dimensional corrections introduced to the design, the results of this analysis will be used in verification of castings operating as components in models of the wedge gate valves.
Źródło:
Prace Instytutu Odlewnictwa; 2012, 52, 4; 127-153
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of time-series analysis in control of chemical composition of grey cast iron
Autorzy:
Perzyk, M.
Rodziewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/380404.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technologia informatyczna
przemysł odlewniczy
zarządzanie jakością
analiza szeregów czasowych
proces topienia
żeliwo szare
information technology
foundry industry
quality management
time series analysis
melting process
grey cast iron
Opis:
The aim of the paper was an attempt at applying the time-series analysis to the control of the melting process of grey cast iron in production conditions. The production data were collected in one of Polish foundries in the form of spectrometer printouts. The quality of the alloy was controlled by its chemical composition in about 0.5 hour time intervals. The procedure of preparation of the industrial data is presented, including OCR-based method of transformation to the electronic numerical format as well as generation of records related to particular weekdays. The computations for time-series analysis were made using the author's own software having a wide range of capabilities, including detection of important periodicity in data as well as regression modeling of the residual data, i.e. the values obtained after subtraction of general trend, trend of variability amplitude and the periodical component. The most interesting results of the analysis include: significant 2-measurements periodicity of percentages of all components, significance 7-day periodicity of silicon content measured at the end of a day and the relatively good prediction accuracy obtained without modeling of residual data for various types of expected values. Some practical conclusions have been formulated, related to possible improvements in the melting process control procedures as well as more general tips concerning applications of time-series analysis in foundry production.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 171-175
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Casting ductile iron in layer moulds made from ecological sands
Autorzy:
Rączka, M.
Gandurski, K.
Isendorf, B.
Powiązania:
https://bibliotekanauki.pl/articles/380228.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne materiały odlewnicze
innowacyjne technologie odlewnicze
ochrona środowiska
żeliwo sferoidalne
forma dwuwarstwowa
innovative foundry materials
innovative foundry technologies
environmental protection
ductile iron
two layer moulds
casting examinations
Opis:
The article contains the results of tests performed under the target project in Hardtop Foundry Charsznica. The objective of the tests and studies was to develop a technology of making high-quality ductile iron castings, combined with effective means of environmental protection. The studies presented in this article related to castings weighing from 1 to 300 kg made from ductile iron of grades 400-15 and 500-7, using two-layer moulds, where the facing and core sand was the sand with an alkaline organic binder, while backing sand was the sand with an inorganic geopolymer binder. A simplified method of sand reclamation was applied with possible reuse of the reclaim as an addition to the backing sand. The cast iron spheroidising treatment and inoculation were selected taking into account the specific conditions of Hardtop Foundry. A pilot batch of castings was made, testing the gating and feeding systems and using exothermic sleeves on risers. The study confirmed the validity of the adopted concept of making ductile iron castings in layer moulds, while maintaining the content of sand with an organic binder at a level of maximum 15%.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 99-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Catalog and Semantic Search of Data in the Domain of Cast Iron Processing
Autorzy:
Rojek, G.
Regulski, K.
Wilk-Kołodziejczyk, D.
Kluska-Nawarecka, S.
Wawrzaszek, T.
Powiązania:
https://bibliotekanauki.pl/articles/381770.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application of information technologies
foundry
semantic search
ontology
cast iron processing
zastosowanie technologii informacyjnych
odlewnictwo
obróbka żeliwa
Opis:
The aim of this study is to design and implement a computer system, which will allow the semantic cataloging and data retrieval in the field of cast iron processing. The intention is to let the system architecture allow for consideration of data on various processing techniques based on the information available or searched by a potential user. This is achieved by separating the system code from the knowledge of the processing operations or from the chemical composition of the material being processed. This is made possible by the creation and subsequent use of formal knowledge representation in the form of ontology. So, any use of the system is associated with the use of ontologies, either as an aid for the cataloging of new data, or as an indication of restrictions imposed on the data which draw user attention. The use of formal knowledge representation also allows consideration of semantic meaning, a consequence of which may be, for example, returning all elements in subclasses of the searched process class or material grade.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 79-84
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Simulation of Cast Iron Flow in Castability Trials
Autorzy:
Popielarski, P.
Hajkowski, J.
Sika, R.
Ignaszak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/355454.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application of information technology to the foundry industry
castings defects
cast iron
castability trial
Opis:
The paper includes validation studies of the flow module of the NovaFlow&Solid simulation code. Experiments of ductile iron and gray iron casting in a spiral test of castability were carried out. Casting experiments were then carried out in industrial conditions in the Ferrex Foundry in Poznań and the results are the castability spiral length and local cast iron rate during mould cavity pouring. Simulation tests using NovaFlow&Solid Control Volume code were made. The technological castability test was used to determine thermal-physical data through simplified inversion problem. Influence of physical parameters in the database of simulation code on the spiral length obtained as the result of simulation was analyzed. It was found that critical fraction of capillary flow CLF down has the biggest impact on cast iron castability in the simulation code. The simulations resulted in defining parameters of gray iron GJL 250 and ductile iron GJS-400-15. For the parameters set, the length of castability spiral in simulations was in accordance with casting experiments.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1433-1439
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:
Diagnosis of Missed Ductile Iron Melts with Process Modelling
Autorzy:
Perzyk, M.
Werlaty, M.
Powiązania:
https://bibliotekanauki.pl/articles/382916.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quality management
information technology
foundry industry
process fault diagnosis
ductile iron melting
data driven model
zarządzanie jakością
technologia informacyjna
przemysł odlewniczy
diagnostyka uszkodzeń
topienie żeliwa
Opis:
The paper presents an application of advanced data-driven (soft) models in finding the most probable particular causes of missed ductile iron melts. The proposed methodology was tested using real foundry data set containing 1020 records with contents of 9 chemical elements in the iron as the process input variables and the ductile iron grade as the output. This dependent variable was of discrete (nominal) type with four possible values: ‘400/18’, ‘500/07’, ‘500/07 special’ and ‘non-classified’, i.e. the missed melt. Several types of classification models were built and tested: MLP-type Artificial Neural Network, Support Vector Machine and two versions of Classification Trees. The best accuracy of predictions was achieved by one of the Classification Tree model, which was then used in the simulations leading to conversion of the missed melts to the expected grades. Two strategies of changing the input values (chemical composition) were tried: content of a single element at a time and simultaneous changes of a selected pair of elements. It was found that in the vast majority of the missed melts the changes of single elements concentrations have led to the change from the non-classified iron to its expected grade. In the case of the three remaining melts the simultaneous changes of pairs of the elements’ concentrations appeared to be successful and that those cases were in agreement with foundry staff expertise. It is concluded that utilizing an advanced data-driven process model can significantly facilitate diagnosis of defective products and out-of-control foundry processes.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 123-126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cooling Rate on Microstructure of Thin-Walled Vermicular Graphite Iron Castings
Autorzy:
Górny, M.
Kawalec, M.
Sikora, G.
Powiązania:
https://bibliotekanauki.pl/articles/380738.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative materials
vermicular graphite cast iron
cooling rate
thermal analysis
microstructure
innowacyjne technologie odlewnicze
materiały innowacyjne
żeliwo grafitowe wermikularne
chłodzenie
analiza termiczna
mikrostruktura
Opis:
This article addresses the effect of cooling rate and of titanium additions on the microstructure of thin-walled vermicular graphite iron (TWCI) castings as determined by changing molding media, section size and Ferro Titanium. The research work was carried out on TWCI castings and reference castings of 2-5 mm and 13-mm wall thickness, respectively. Various molding materials were employed (silica sand and insulating sand ‘‘LDASC’’) to achieve different cooling rates. Thermal analysis was implemented for determinations of the actual cooling rates at the onset of solidification. This study shows that the cooling rates exhibited in the TWCI castings varies widely (70- 14oC/s) when the wall thickness is changed from 2 to 5 mm. In turn, this is accompanied by a significant variation in the vermicular graphite fraction. The resultant cooling rates were effectively reduced by applying an insulating sand in order to obtain the desired vermicular graphite shape. In addition, good agreement was found between the theoretical predictions of the solidification process and the experimental outcome. Ti additions in combination with LDASC sand molds were highly effective in promoting the development of over 80 % vermicular graphite in castings with wall thicknesses of 2 and 3 mm as evidenced by quantitative metallographic analyses.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 139-142
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of Electrical Resistance of Carburizers Used for Cast Iron Production
Autorzy:
Książek, D.
Koza, M.
Bieroński, M.
Krasa, O.
Kuś, R.
Powiązania:
https://bibliotekanauki.pl/articles/381730.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast iron
foundry material
carburizer
electrical resistance
żeliwo
materiał odlewniczy
nawęglacz
opór elektryczny
Opis:
The publication presents the results of examination of selected carburizers used for cast iron production with respect to their electric resistance. Both the synthetic graphite carburizers and petroleum coke (petcoke) carburizers of various chemical composition were compared. The relationships between electrical resistance of tested carburizers and their quality were found. The graphite carburizers exhibited much better conductivity than the petcoke ones. Resistance characteristics were different for the different types of carburizers. The measurements were performed according to the authors’ own method based on recording the electric current flow through the compressed samples. The samples of the specified diameter were put under pressure of the gradually increased value (10, 20, 50, 60, and finally 70 bar), each time the corresponding value of electric resistance being measured with a gauge of high accuracy, equal to 0.1μΩ. The higher pressure values resulted in the lower values of resistance. The relation between both the thermal conductance and the electrical conductance (or the resistance) is well known and mentioned in the professional literature. The results were analysed and presented both in tabular and, additionally, in graphic form.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 65-68
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of Cast Iron Smelting in Induction Crucible Furnaces
Autorzy:
Grachev, V.
Powiązania:
https://bibliotekanauki.pl/articles/381609.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
heat treatment
cast iron smelting
electric induction furnace
crucible
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
obróbka cieplna
hutnictwo żeliwa
piec indukcyjny
tygiel
Opis:
The article describes the trend towards increased use of induction crucible furnaces for cast iron smelting. The use of gas cupola’s duplex process – induction crucible furnace – has been proved the effective direction of scientific and technical advance in the foundry industry. Gas cupolas and induction furnaces are used for cast iron smelting at the Penza Compressor Plant where in the 1960s the author developed and introduced gas cupolas for the first time in the world. In the article, the author represents the findings of the investigation on thermodynamics of crucible reduction of silicon, which is pivotal when choosing the technological mode for cast iron smelting in induction furnaces. The author proposes a new reaction crucible diagram with due account of both partial pressure and activity of the components involved into the process. For the first time ever, the electrochemical mechanism of a crucible reaction has been studied and the correctness of the proposed diagram has been confirmed.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 45-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of Ferritic Nodular Cast Iron Containing About 5-6% Aluminium
Autorzy:
Soiński, M. S.
Kordas, P.
Skurka, K.
Jakubus, A.
Powiązania:
https://bibliotekanauki.pl/articles/379726.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
metallography
Al-alloyed cast iron
spheroidization
graphite precipitates
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
metalografia
żeliwo stopowe
sferoidyzacja
wydzielenia grafitu
Opis:
The work presents results of investigations concerning the production of cast iron containing about 5-6% aluminium, with the ferritic matrix in the as-cast state and nodular or vermicular graphite precipitates. The examined cast iron came from six melts produced under the laboratory conditions. It contained aluminium in the amount of 5.15% to 6.02% (carbon in the amount of 2.41% to 2.87%, silicon in the amount of 4.50% to 5.30%, and manganese in the amount of 0.12% to 0.14%). After its treatment with cerium mixture and graphitization with ferrosilicon (75% Si), only nodular and vermicular graphite precipitates were achieved in the examined cast iron. Moreover, it is possible to achieve the alloy of pure ferritic matrix, even after the spheroidizing treatment, when both the aluminium and the silicon occur in cast iron in amounts of about 5.2÷5.3%.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 141-146
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of Fault Diagnosis in Ductile Iron Melting Process
Autorzy:
Perzyk, M.
Kozlowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/382169.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quality management
information technology
foundry industry
process fault diagnosis
ductile iron
data driven model
zarządzanie jakością
technologia informatyczna
przemysł odlewniczy
diagnostyka uszkodzeń
żeliwo ADI
model danych
Opis:
Statistical Process Control (SPC) based on the Shewhart’s type control charts, is widely used in contemporary manufacturing industry, including many foundries. The main steps include process monitoring, detection the out-of-control signals, identification and removal of their causes. Finding the root causes of the process faults is often a difficult task and can be supported by various tools, including data-driven mathematical models. In the present paper a novel approach to statistical control of ductile iron melting process is proposed. It is aimed at development of methodologies suitable for effective finding the causes of the out-of-control signals in the process outputs, defined as ultimate tensile strength (Rm) and elongation (A5), based mainly on chemical composition of the alloy. The methodologies are tested and presented using several real foundry data sets. First, correlations between standard abnormal output patterns (i.e. out-of-control signals) and corresponding inputs patterns are found, basing on the detection of similar patterns and similar shapes of the run charts of the chemical elements contents. It was found that in a significant number of cases there was no clear indication of the correlation, which can be attributed either to the complex, simultaneous action of several chemical elements or to the causes related to other process variables, including melting, inoculation, spheroidization and pouring parameters as well as the human errors. A conception of the methodology based on simulation of the process using advanced input - output regression modelling is presented. The preliminary tests have showed that it can be a useful tool in the process control and is worth further development. The results obtained in the present study may not only be applied to the ductile iron process but they can be also utilized in statistical quality control of a wide range of different discrete processes.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 101-108
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microadditions of boron and vanadium in ADI. Pt 2. Own investigations
Mikrododatki boru i wanadu w żeliwie ADI. Cz. 2. Badania własne
Autorzy:
Pirowski, Z.
Wodnicki, J.
Olszyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/391672.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
innowacyjne materiały i technologie odlewnicze
obróbka cieplna
hartowanie z przemianą izotermiczną
żeliwo ADI
mikrododatki stopowe
innovative foundry materials and technologies
heat treatment
austempering
austempered ductile iron (ADI)
alloying microadditions
Opis:
In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigations were presented. Within this study two series of melts of the ductile iron were made, introducing microadditions of the above mentioned elements to both unalloyed ductile iron and the ductile iron containing high levels of nickel and copper (the composition typical of ADI). Melts were conducted with ironnickel-magnesium master alloy. Thermal analysis of the solidification process of the cast keel blocks was conducted, the heat treatment of the alloys was carried out, and then the effect of the introduced additions of boron and vanadium on the hardenability of the investigated cast iron was examined and evaluated.
W drugiej części pracy, opisującej rolę mikrododatków wanadu i boru w procesie kształtowania się struktury grubościennych odlewów z żeliwa ADI, omówiono wyniki przeprowadzonych badań własnych. W ramach pracy wykonano dwie serie wytopów żeliwa sferoidalnego wprowadzając mikrododatki tych pierwiastków zarówno do niestopowego żeliwa sferoidalnego, jak też do żeliwa zawierającego zwiększoną zawartości niklu i miedzi (skład typowego żeliwa ADI). Wytopy prowadzono stosując zaprawy żelazowo-niklowo-magnezowe. Przeprowadzono analizę termiczną procesu krzepnięcia odlewanych wlewków, wykonano obróbkę cieplną otrzymanych stopów, a następnie oceniono wpływ wprowadzanych dodatków boru i wanadu na hartowność badanego żeliwa.
Źródło:
Prace Instytutu Odlewnictwa; 2008, 48, 3; 49-56
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł

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