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Tytuł:
Evaluation of Foundry Properties of Brahmaputra River Sand and its Prospects
Autorzy:
Rana, Md. Shohel
Shahriar, Md. Shams
Alam, Md. Sha
Hossain, Md. Imam Sohel
Biswas, Pradip Kumar
Zaman, Mohammad Nazin
Powiązania:
https://bibliotekanauki.pl/articles/27314157.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
foundry properties
grain fineness number
green strength
metal casting
river sand
właściwości odlewnicze
rozdrobnienie ziarna
odlew metalowy
piasek rzeczny
Opis:
The river system of the Bengal delta encompasses a huge amount of fluvial sand; however, no comprehensive studies were available on using this river sand in foundry industries. Hence, the present research evaluates the foundry properties of trans-boundary Brahmaputra River sand and its prospects for use in foundries. Several laboratory analyses have been performed to elicit the foundry properties using standard methods of foundry analysis, including XRD, XRF, TG-DSC, and FESEM. From the study, the sand contains mainly quartz with small amounts of feldspar, amphibole, chlorite, and mica, and exhibits a subangular to subrounded shape. The sand is dominated by SiO2 (67.81-69.97%) and lesser amounts of other oxides, and it is thermally stable within 1000 °C temperature. The grain fineness number (64-79), mineralogical, chemical, thermal, and foundry properties are suitable for non-ferrous metal casting without distortion. Further, the aluminum and zinc alloy casting with trials demonstrate their potential for use in the foundry industries. The outcomes of this study thus offer valuable information about utilizing Brahmaputra River sand for foundry applications.
Źródło:
Archives of Foundry Engineering; 2023, 23, 2; 80--90
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innowacyjna technologia produkcji bentonitu odlewniczego z wykorzystaniem wyselekcjonowanych frakcji powstających przy wytwarzaniu sorbentów
Innovative technology of casting bentonite manufacture on the basis of selected fractions obtained in the production of sorbents
Autorzy:
Pezarski, F.
Palma, A.
Izdebska-Szanda, I.
Powiązania:
https://bibliotekanauki.pl/articles/77090.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
bentonit
innowacje technologiczne
masy formierskie
sorbenty
spoiwa odlewnicze
technologia produkcji
wlasciwosci fizykochemiczne
Opis:
W artykule przedstawiono wyniki badań laboratoryjnych i przemysłowych podjętych wspólnie z firmą zajmującą się przetwórstwem bentonitów, w celu opracowania, przebadania i wdrożenia innowacyjnej technologii produkcji wysokojakościowego bentonitu dla odlewnictwa na bazie surowca, bentonitu suszonego i wyselekcjonowanych frakcji uzyskiwanych przy wytwarzaniu sorbentów higienicznych. Podczas produkcji tych sorbentów powstają wyselekcjonowane drobne frakcje materiału, które nie opłaca się ponownie wykorzystał przy produkcji zasypek higienicznych, ale jak wykazały wstępne badania charakteryzują się znaczną zawartością montmorylonitu i zbliżoną ziarnistością do bentonitu odlewniczego i mogą być cennym surowcem do produkcji wysokojakościowego bentonitu odlewniczego. W artykule przedstawiono wyniki prób i badań przerobu i uszlachetniania materiałów wyjściowych w procesach suszenia, mielenia, aktywacji, separacji i klasyfikacji oraz wykonywania partii doświadczalnych bentonitów odlewniczych. Przedstawiono również wyniki badań zastosowania tych bentonitów do wykonywania mas formierskich, form i odlewów próbnych.
The article presents the results of laboratory and industrial investigations undertaken in cooperation with a bentonite processing company. The aim of the study was the investigation and implementing of an innovative technology of the production of high-quality bentonite on the basis of the raw material: dried bentonite and selected fractions obtained in the production of hygienic sorbents. During the production of these sorbents, fine fractions of material were selected, useless for further use in the production of hygienic powders. But, as preliminary investigations showed, these fractions contained a considerable amount of montmorillonite with approximate granulation to casting bentonite and could turn out a valuable material for the production of high - quality casting bentonite. The article presents the results of trials and investigations on the processing and refinement of the material in the processes of drying, milling, activation, separation and classifi cation, as well as producing test samples of bentonites. Also, the results of experimental use of these bentonites in the preparation of moulding sands, moulds and experimental castings are presented.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2011, 13
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Microstructure and Properties of the Bimetallic AZ91/AlSi17 Joint Produced by Compound Casting
Autorzy:
Mola, R.
Bucki, T.
Powiązania:
https://bibliotekanauki.pl/articles/381472.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
casting process
microstructure
mechanical properties
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
proces odlewania
mikrostruktura
właściwości mechaniczne
Opis:
Bimetallic AZ91/AlSi17 samples were produced by compound casting. The casting process involved pouring the AZ91 magnesium alloy heated to 650ºC onto a solid AlSi17 aluminum alloy insert placed in a steel mould. Prior to casting, the mould with the insert inside was heated to about 370ºC. The bonding zone formed between AZ91 and AlSi17 had a thickness of about 200 μm; it was characterized by a non-homogeneous microstructure. Two different areas were distinguished in this zone: the area adjacent to the AZ91 and the area close to the AlSi17. In the area closest to the AZ91 alloy, a eutectic composed of an Mg17Al12 intermetallic phase and a solid solution of Al in Mg was observed. In bonding zone at a certain distance from the AZ91 alloy an Mg2Si phase co-occurred with the eutectic. In the area adjacent to the AlSi17 alloy, the structure consisted of Al3Mg2, Mg17Al12 and Mg2Si. The fine Mg2Si phase particles were distributed over the entire Mg-Al intermetallic phase matrix. The microhardness of the bonding zone was much higher than those of the materials joined; the microhardness values were in the range 203-298 HV. The shear strength of the AZ91/AlSi17 joint varied from 32.5 to 36 MPa.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 71-76
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reclamation of self-setting mixtures with olivine bound with alkaline resols
Autorzy:
Jelínek, P.
Duda, J.
Mikšovský, F.
Beňo, J.
Powiązania:
https://bibliotekanauki.pl/articles/382404.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
właściwości mechaniczne
regeneracja
innovative foundry technologies
innovative foundry material
mechanical properties
self setting mixtures
alkaline resols
reclamation
Opis:
For the reasons of environmental problems connected with the use of furan binders the attention is increasingly paid to self-setting mixtures with alkali resols. A resol binder stabilized with KOH, NaOH is hardened by liquid esters with the formation of alkaline salts. The increase of their concentration affects the shortening of the mixture bench life, it decreases strength, abrasive wear of moulds and cores is growing, and it results in uneconomical dilution of the reclaim with expensive new base sand. Length of life (bench life) of mixtures plays an important role just in manufacture of huge and voluminous moulds and cores in self-setting mixtures. This contribution aims at analyzing the function of reactive alkaline salts in the reclaim, it monitors consequences of its thermal exposure on properties of self-setting mixtures, and it deals with development of methods evaluating its qualities.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 47-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad wykorzystaniem krajowej biomasy w produkcji zasypek odlewniczych
Studies on the use of domestic biomass in production of casting powders
Autorzy:
Pogorzałek, J.
Borecki, M.
Różański, P.
Powiązania:
https://bibliotekanauki.pl/articles/181713.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica
Tematy:
biomasa
zasypki odlewnicze
właściwości fizykochemiczne
rozkład termiczny
biomass
casting powders
physical and chemical characteristics
thermal distribution
Opis:
Przedstawiono przebieg i wyniki prac badawczych mających na celu opracowanie technologii wytwarzania zasypek odlewniczych dla stalownictwa z wykorzystaniem krajowej biomasy. Przeprowadzono badania właściwości fizyko-chemicznych wybranych odpadów z przemysłu rolno-spożywczego celem porównania z właściwościami szeroko stosowanej obecnie łuski ryżowej. Wykonano analizy chemiczne, analizy termiczne TG-DSC w atmosferze obojętnej i utleniającej oraz laboratoryjne badania procesu termicznego rozkładu otrąb, plew i innych odpadów z przetwórstwa krajowych zbóż. Skuteczność opracowanych składów zasypek izolacyjnych i izolacyjno-egzotermicznych z wykorzystaniem w/w biomas oraz odpadów mineralnych w postaci żużli stalowniczych określono w warunkach laboratoryjnych. Stwierdzono możliwość zastąpienia importowanej łuski ryżowej krajowymi odpadami przemysłu zbożowego w zasypkach odlewniczych.
The paper presents the course and results of the research works aimed at developing technology for manufacturing casting powders for steelmaking using the domestic biomass. The tests of physical and chemical characteristics of selected waste from the food processing industry were carried out to compare them to those of the rice husk which is widely used at present. Chemical analyses, TG-DSC thermal analyses in inert gas atmosphere and in oxidizing atmosphere conditions and laboratory tests of thermal decomposition of bran, chaffs and other wastes from domestic cereals treatment processes were done. Insulation efficiency of developed casting powders (insulating and exothermicinsulating types) based on the above-mentioned biomasses and mineral wastes (steelmaking slags) was determined in laboratory scale. It was concluded that domestic biomasses (wastes from the food processing industry) could replace the imported rice husk in casting powders.
Źródło:
Prace Instytutu Metalurgii Żelaza; 2013, T. 65, nr 4, 4; 8-17
0137-9941
Pojawia się w:
Prace Instytutu Metalurgii Żelaza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Modification in Centrifugal Casting on Microstructure and Mechanical Properties of Silicon Bronzes
Autorzy:
Garbacz-Klempka, A.
Kozana, J.
Piękoś, M.
Papaj, P.
Perek-Nowak, M.
Powiązania:
https://bibliotekanauki.pl/articles/379593.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
CuSi alloys
centrifugal casting
microstructure
mechanical properties
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
stop Cu-Si
odlewanie odśrodkowe
mikrostruktura
właściwości mechaniczne
Opis:
Silicon bronzes are characterised by good mechanical properties and by high corrosion and mechanical wear resistance. The process of sleeve casting by means of the centrifugal casting with the horizontal axis of the mould rotation was analysed. The assessment of the influence of modification and centrifugal casting parameters on the microstructure and mechanical properties of alloys was carried out in the hereby work. Zirconium was applied as a modifier. Speed of rotation of the mould was the variable parameter of the centrifugal casting. The investigation results were summarised on the basis of the microstructure analysis and mechanical properties determination: UTS, proof stress, A10 and BHN. The experiment aimed at finding the information in which way the modification together with changing the pouring parameters influence the mechanical properties of the CuSi3Zn3FeMn alloy.
Źródło:
Archives of Foundry Engineering; 2018, 18, 3; 11-18
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation of Structure and Properties in Casting Processes on the Example of AZ91 Magnesium Alloy
Autorzy:
Augustyn, B.
Szymanek, M.
Kapinos, D.
Boczkal, S.
Korczak, P.
Powiązania:
https://bibliotekanauki.pl/articles/383152.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
magnesium alloy
AZ91 alloy
RS process
mechanical properties
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
stop magnezu
stop AZ91
właściwości mechaniczne
Opis:
Contemporary materials engineering requires the use of materials characterised by high mechanical properties, as these precisely properties determine the choice of material for parts of machinery and equipment. Owing to these properties it is possible to reduce the weight and, consequently, the consumption of both material and energy. Trying to meet these expectations, the designers are increasingly looking for solutions in the application of magnesium alloys as materials offering a very beneficial strength-to-weight ratio. However, besides alloying elements, the properties are to a great extent shaped by the solidification conditions and related structure. The process of structure formation depends on the choice of casting method forced by the specific properties of casting or by the specific intended use of final product. The article presents a comparison of AZ91 magnesium alloys processed by different casting technologies. A short characteristic was offered for materials processed by the traditional semi-continuous casting process, which uses the solidification rates comprised in a range of 5 - 20⁰C/s, and for materials made in the process of Rapid Solidification, where the solidification rate can reach 106⁰C/s. As a result of the casting process, a feedstock in the form of billets and thin strips was obtained and was subjected next to the process of plastic forming. The article presents the results of structural analysis of the final product. The mechanical properties of the ø7 mm extruded rods were also evaluated and compared.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2; 43-48
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of Bentonites and Bentonite Mixtures used in Casting Processes
Autorzy:
Paź, S.
Drożyński, D.
Górny, M.
Cukrowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/379839.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting processes
bentonite
properties of bentonites
bentonite mixture
green sands
procesy odlewnicze
bentonit
właściwości bentonitów
mieszanki bentonitowe
Opis:
In this work, an assessment and comparison of the quality of selected bentonites and bentonite mixtures was made. The samples consisted of available foundry materials used for bonding green sands. Determining the homogeneity degree and specific surface area of the grains allowed us to compare the examined materials and determine their influence on other parameters. On the basis of a thermal analysis of the bentonites or bentonite mixtures, the changes occurring in the sample during its heating were determined. Determining the potential for ion exchange and montmorillonite content enabled us to assess the binding properties of the materials. The preparation of six green sands with different bentonites or bentonite mixtures gave us the opportunity to assess the changes in apparent density, permeability, compressive strength and friability as a function of humidity, and the impact of different materials on the mentioned parameters. Their charts were analyzed, and the molding sand with the addition of bentonite or a bentonite mixture was selected for which these parameters are favorable. On this basis, the best-presented binding material was assessed and selected.
Źródło:
Archives of Foundry Engineering; 2019, 2; 35-40
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lead-Free Casting Brasses. Investigations of the Corrosion Resistance and Shaping of Microstructure and Properties
Autorzy:
Kozana, J.
Garbacz-Klempka, A.
Piękoś, M.
Powiązania:
https://bibliotekanauki.pl/articles/379921.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
lead-free casting brasses
mechanical properties
microstructure
environmental protection
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
odlewy mosiężne bezołowiowe
właściwości mechaniczne
mikrostruktura
ochrona środowiska
Opis:
The ecological factor is very important in shaping properties of alloys. It leads to a limitation or elimination, from the surroundings, of harmful elements from the heavy metals group. The so-called eco-brasses group comprises common lead-free brasses containing 10 to 40% of zinc and arsenic brasses of a high dezincification resistance. Among standardized alloys, CW511L alloy ( acc. to EN standard) or MS-60 alloy (acc. to DIN) can be mentioned. Investigations were performed on two different kinds of metal charges: ingots cast by gravity and the ones obtained in the semi-continuous casting technology with using crystallizers. The casting quality was analysed on the basis of the microstructure images and mechanical properties. The investigations also concerned increasing the corrosion resistance of lead-free alloys. This resistance was determined by the dezincification tendency of alloys after the introduction of alloying additions, i.e. aluminium, arsenic and tin. The investigations focused on the fact that not only alloying additions but also the production methods of charge materials are essential for the quality of produced castings. The introduced additions of aluminium and tin in amounts: 0÷1.2 wt% decreased the dezincification tendency, while arsenic, already in the amount of 0.033 wt%, significantly stopped corrosion, limiting the dezincification process of lead-free CuZn37 brass. At higher arsenic contents, corrosion occurs only within the thin surface layer of the casting (20 μ).
Źródło:
Archives of Foundry Engineering; 2019, 2; 113-118
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of multipoint sequential water mist cooling of casting die on microstructure and mechanical properties of AlSi11 alloy
Autorzy:
Władysiak, R.
Powiązania:
https://bibliotekanauki.pl/articles/380430.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
odlewanie kokilowe
mgła wodna
AlSi11
mikrostruktura
właściwości mechaniczne
innovative foundry technologies
innovative foundry materials
casting die cooling
water mist
microstructure
mechanical properties
Opis:
The work is a continuation of research on the use of water mist cooling in order to increase efficiency of the die-casting process for aluminum alloys. The paper describes the multipoint sequential cooling system of the casting die and its computer control and monitoring. It also includes results of the tests and analysis of cooling methods during making of the casting. These methods differ from each other in the sequence of casting die cooling and cause effective changes in microstructure and mechanical properties of castings made of AlSi11 alloy. The study demonstrated that the use of multipoint sequential cooling with water mist affects the microstructure refinement and reduces the segregation in the cast as well as more than by 20% increases the mechanical properties of castings in the rough state. The study also demonstrates that the sequential cooling of casting die accelerates the cooling of the casting and shortens die-casting cycle.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 145-150
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Electrical Properties of Materials on Effectiveness of Heating Their Systems in Microwave Field
Autorzy:
Stachowicz, M.
Opyd, B
Granat, K.
Markuszewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/381305.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting technologies
microwaves
moulding sands
foundry instrumentation
electrical properties
innowacyjne technologie odlewnicze
mikrofale
masa formierskia
właściwości elektryczne
Opis:
In the paper presented are results of a research on influence of electrical and physico-chemical properties of materials being parts of multicomponent and multimaterial systems used in foundry practice on efficiency and effectiveness of microwave heating. Effectiveness of the process was evaluated on the grounds of analysis of interaction between selected parameters of permittivity and loss factor, as well as collective index of energy absorbed, reflected and transmitted by these materials. In the examinations used was a stand of wave guide resonance cavity for determining electrical properties and a stand of microwave slot line for determining balance of microwave power emitted into selected materials. The examinations have brought closer the possibility of forecasting the behaviour of multimaterial systems like e.g. model, moulding sand or moulding box in microwave field on the grounds of various electrical and physico-chemical properties. On the grounds of analysis of the results, possible was selecting a group of materials designed for building foundry instrumentation to be effectively used in electromagnetic field.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2; 111-114
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Hardening Methods on the Moulding Sand’s Properties with Gypsum Binder
Autorzy:
Granat, K.
Paduchowicz, P.
Dziedzic, A.
Jamka, M.
Biały, P.
Powiązania:
https://bibliotekanauki.pl/articles/1840922.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
gypsum binder
foundry masses
core mass
masses properties
odlewnia
spoiwo gipsowe
masy odlewnicze
masa rdzeniowa
właściwości masy
Opis:
The research paper presents the results of testing the strength and technological properties of molding sand with gypsum binder, the bonding process proceeded: naturally or conventionally. The tests included mass containing (parts by weight): 78 pbw. Grudzeń-Las quartz sand, 22 pbw. plaster gypsum "Dolina Nidy” and 9 pbw. water. Measurements of compressive strength, shear, tensile and bending as well as permeability and looseness were carried out on standard cylindrical samples kept in the air for 1-96 hours or dried at 110oC for 1-8 hours. The results of the analysis were analyzed in connection with the mass structure and construction binding bridges warp grains observed with a scanning microscope (SEM). The influence of drying intensity on the bonding process and related mass properties has been demonstrated, especially from the point of view of the possibility of selection and / or intensification of a specific curing method for use in the production of gypsum binger molds and cores.
Źródło:
Archives of Foundry Engineering; 2020, 20, 4; 13-17
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural and Tribological Characterization of Aluminium Bronzes with Additions of Si and Cr
Autorzy:
Pisarek, B. P.
Kowalski, B.
Atapek, H.
Polat, Ş.
Tüfekçi, T.
Powiązania:
https://bibliotekanauki.pl/articles/382034.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative foundry materials
aluminium bronze
wear resistant
TDA method
microstructure
tribological properties
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
brąz aluminiowy
odporność na zużycie
metoda TDA
mikrostruktura
właściwości tribologiczne
Opis:
The article presents the investigation results of the crystallization (performed by means of the TDA method) and the microstructure of complex aluminium bronzes with the content of 6% Al, 4% Fe and 4% Ni, as well as Si additions in the scope of 1–2% and Cr additions in the scope of 0.1–0.3%, which have not been simultaneously applied before. For the examined bronze, the following tests were performed: hardness HB, impact strength (KU2). For bronze CuAl6Fe4Ni4Si2Cr0.3, characterizing in the highest hardness, wear tests were conducted with dry friction and the dry friction coefficient. The investigations carried out by means of the X-ray phase analysis demonstrated the following phases in the microstructure of this bronze: αCu, γ2 and complex intermetallic phases based on iron silicide type Fe3Si (M3Si M={Fe,Cr,…}). Compared to the normalized aluminium bronzes (μ=0.18–0.23), the examined bronze characterizes in relatively low wear and lower friction coefficient during dry friction (μ=0.147±0.016).
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 93-98
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wybranych właściwości utwardzanych mikrofalowo mas formierskich wiązanych spoiwami na bazie skrobi
Analysis of the Selected Properties of Microwave-Cured Moulding Sands with Starch-Based Binders
Autorzy:
Kaczmarska, K.
Grabowska, B.
Drożyński, D.
Powiązania:
https://bibliotekanauki.pl/articles/380756.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nowoczesne materiały odlewnicze
spoiwo skrobiowe
skrobia natywna
właściwości mas formierskich
modern casting materials
adhesive starch
native starch
mouldings properties
Opis:
Celem przeprowadzonych badań było określenie wybranych właściwości utwardzonych mikrofalowo mas formierskich ze spoiwami na bazie skrobi. Efektywność wiązania ziaren osnowy określono w oparciu o wyniki oznaczenia płynności, przepuszczalności, ścieralności oraz wytrzymałości na zginanie i rozciąganie masy utwardzonej. Dokonano wstępnej oceny zasadności mikrofalowego utwardzania mas formierskich zawierających samodzielne spoiwa skrobiowe w postaci natywnej skrobi ziemniaczanej Superior Standard oraz komercyjnego produktu Albertine F/1.
The aim of the study was to determine the properties of the moulding sands with binders consist of starch. The efficiency of binding of the sand grains was determined based on the results of the determination of liquidity, permeability, abrasion resistance and flexural strength and tensile strength of the microwave-cured moulding sands. There was made a preliminary assessment of the merits of microwave curing prepared moulding with a binder in the form of a native potato starch as Superior Standard and commercial product as Albertine F/1.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4 spec.; 51-54
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of Fracture Stress with Regard to Porosity in Cast A356 Alloy
Autorzy:
Sahin, H.
Atik, M.
Tezer, F.
Temel, S.
Aydin, O.
Kesen, O.
Gursoy, O.
Dispinar, Derya
Powiązania:
https://bibliotekanauki.pl/articles/2079787.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
A356
casting defects
mechanical properties
porosity
fracture stress
Bifilm
stop A356
wady odlewnicze
właściwości mechaniczne
porowatość
naprężenia
Opis:
Production of the defect-free casting of aluminium alloys is the biggest challenge. Porosity is known to be the most important defect. Therefore, many cast parts are subjected to several non-destructive tests in order to check their acceptability. There are several standards, yet, the acceptance limit of porosity size and distribution may change according to the customer design and requirements. In this work, the aim was targeted to evaluate the effect of size, location, and distribution of pores on the tensile properties of cast A356 alloy. ANSYS software was used to perform stress analysis where the pore sizes were changed between 0.05 mm to 3 mm by 0.05 mm increments. Additionally, pore number was changed from 1 to 5 where they were placed at different locations in the test bar. Finally, bifilms were placed inside the pore at different sizes and orientations. The stress generated along the pores was recorded and compared with the fracture stress of the A356 alloy. It was found that as the bifilm size was getting smaller, their effect on tensile properties was lowered. On the other hand, as bifilms were larger, their orientation became the dominant factor in determining the fracture.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 21-28
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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