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PL
W artykule przedstawiono przykład zastosowania metody ATND do badań krystalizacji stopów metali nieżelaznych, jak również próby określania powstających składników stopowych. Badania prowadzone były na syntetycznym stopie na bazie aluminium AlCu7Ni5Fe3.
EN
New ATND technique used to evaluate the phase composition in AlCu7Ni5Fe3 alloy was presented. The characteristic points were obtained from solidification curves and from milivoltage curves as well as from their derivatives of solidification and crystallization curves with ATND method.
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Content available remote Rejestracja procesu krystalizacji syntetycznego stopu AlNi5,0 metodą „ATND”
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PL
W artykule przedstawiono przykład zastosowania nowej metody ATND do badań krystalizacji stopów metali nieżelaznych. Badania prowadzone były na syntetycznym stopie aluminium z niklem AlNi5,0.
EN
New ATND technique used to evaluate the phase composition in AlNi5,0 alloy was presented. The characteristic points were obtained from solidification curves and from milivoltage curves as well as from their derivatives of solidification and crystallisation curves with ATND method.
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Content available remote Zastosowanie metody ATD do kontroli żeliwa wermikularnego
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tom R. 2, nr 44
355--364
PL
W pracy przedstawiono wyniki badań procesu krystalizacji metodą ATD żeliwa wermikularnego. Stwierdzono występowanie charakterystycznych różnic między krzywymi ATD żeliwa wyjściowego i wermikularnego oraz istnienie korelacji pomiędzy charakterystycznymi parametrami krzywych ATD a właściwościami Rm, Rp0,2, A5 i HB. Otrzymane wyniki potwierdzają możliwość zastosowania metody ATD do kontroli procesu otrzymywania żeliwa wermikularnego.
EN
The test results of crystallization of cast iron with vermicular graphite, which were made with the thermal-derivative analysis method, have been presented here. The characteristic differences between cast iron before and after the vermicularization have been stated on the derivative curve. It has been proved, that there is a statistic dependence between the characteristic parameters of ATD curves and mechanical properties: Rm, Rp0,2, A5 and HB of this cast iron. The results verify the possibility to use the ATD method to control of production of cast iron with vermicular graphite.
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Content available remote Wytrzymałość na rozciąganie stopu AG10 określana metodą ATND
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PL
W artykule przedstawiono próbę zastosowania jednoczesnej metody Analizy Termiczno-Napięciowo Derywacyjnej do określenia wytrzymałości na rozciąganie Rm stopu AG10. Badany stop topiono w elektrycznym piecu oporowym. Następnie przeprowadzono rejestrację krystalizacji metodą ATND oraz analizę regresji dla uzyskania równania do określania wytrzymałości na rozciąganie Rm.
EN
The evaluation test of mechanical properties of the AG10 have been described in this paper. The characteristics points obtained from the solidification curves and from the voltage curves, as well from their derivatives have been determined on the state of the solidification and crystallization curves using the metode simultaneous recording ATND.
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2011
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tom Vol. 11, iss. 3
65-68
EN
Among alloys of non-ferrous metals, aluminum alloys have found their broadest application in foundry industry. Silumins are widely used in automotive, aviation and shipbuilding industries; as having specific gravity nearly three times lower than specific gravity of cast iron. The silumins can be characterized by high mechanical properties. To upgrade mechanical properties of a castings made from silumins one makes use of heat treatment, what leads to change of their structure and advantageously affects on mechanical properties of the silumins. In the paper are presented test results concerning effect of dispersion hardening on change of tensile strength of EN AB-48000 silumin modified with strontium. Investigated alloy was melted in electric resistance furnace. Temperature ranges of solution heat treatment and ageing heat treatment were selected on base of curves from ATD method, recorded for refined alloy and for modified alloy. The heat treatment resulted in change of Rm tensile strength, while performed investigations have enabled determination of temperatures and durations of solution heat treatment and ageing heat treatment, which precondition obtainment of the best tensile strength Rm of the investigated alloy.
EN
Magnesium alloys are characterized by advantageous ratio of strength and/or elastic modulus to density, that is, can sustain static and dynamic loads similar to iron and aluminium, and additionally feature good vibration damping. Castings from magnesium alloys are lighter with about 20 - 30% than aluminium alloys and with 50 – 75% than iron alloys, that is why they are used in aviation and rocket industry and everywhere the weight of a product is of important significance for conditions of its operation. Also automotive industry introduces to vehicle’s structure an elements (castings) manufactured from such alloys. On metallic matrix of magnesium alloys with lithium are also manufactured a composites reinforced with e.g. ceramic fiber, which are used as lightweight and resistant structure materials. The paper presents an attempt of implementation of ATND method (Thermal-Voltage-Derivative Analysis) to monitoring of crystallization process of ultra-lightweight Mg-Li alloys. Investigated magnesium alloys with contents of about 2,3% Li, 10% Li and 11 % Li were produced in the Foundry Research Institute. Registration of melting and crystallization processes was made with use of the ATND method. Results of preliminary tests are shown in graphical form.
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2007
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tom Vol. 7, iss. 3
117-122
EN
Crystallization processes of alloys determine structure of castings and the same their utility properties. Knowledge about run of the processes is a source of information for development of technology to preparation of liquid metal and to control of preparation of the alloys within in industry. Hence, making use of crystallization processes theory to control of the technological processes aimed at obtaining the best possible structure of the material for a given requirements becomes important factor in production of castings. The paper discusses an impact of the modification process and heat treatment on mechanical properties of AK132 (AlSi12Cu2Fe) alloy. Investigated alloy was melted in electric resistance furnace. Run of the crystallization process has been presented with use of thermal-voltage-derivative analysis (ATND). That method was also implemented to determination of temperature range of heat treatment operations of the alloy. Obtained results concern registered solidification curves from the ATND method, luminous microscopy, strength tests and observation of fracture�fs surfaces of the tested alloy after static tensile test. For approximately eutectic AK132 silumin there were obtained advantageous changes of mechanical properties of the alloy caused mainly by refining of [alpha]+Si eutectic mixture, present in not-modified alloy in lamellar form. The changes are also reflected in course of the crystallization process and morphology of fracture surface after static tensile test. Performed heat treatment of AK132 silumin, consisting on hyper quenching and ageing has enabled to obtain positive result connected with additional implementation of ATND method, which registers melting (heating) processes of the alloy, to determination of heat treatment temperatures. On base of performed tests of heat-treated alloy one has specified the range of parameters, which determine obtaining the best possible mechanical properties. The research was performed in laboratory conditions, and therefore requires verification in industry conditions.
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Content available remote Ocena jakości żeliwa sferoidalnego EN-GJS-400-15 metodą ATD
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PL
Określono liczbę wydzieleń grafitu w funkcji jego kształtu oraz udział objętościowy grafitu w zależności od charakterystycznych parametrów krzywych ATD. Opracowano związki eksperymentalne dla określenia stopnia sferoidyzacji grafitu jak również własności mechanicznych żeliwa sferoidalnego.
EN
We have defined the number of graphite separations in funclion of its shape and the graphite separations share depending on the characteristic parameters of TDA curves. We have also delineated experimental relations necessary to define the degree of the spheroidization process as well as mechanical properties of ductile cast iron.
9
Content available remote Szacowanie własności mechanicznych siluminu AK9 na podstawie metody ATND
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PL
W artykule przedstawiono próbę zastosowania metody analizy napięciowo derywacyjnej do określenia własności mechanicznych siluminu AK9 (Rm). Badany stop został poddany typowym zabiegom rafinacji i modyfikacji. Następnie została przeprowadzona analiza regresji w celu uzyskania równania do szacowania wytrzymałości na rozciąganie Rm.
EN
The evaluation test of mechanical properties of the AK9 have been described in this paper. The characteristics points obtained from the solidification curves and from the voltage curves, as well from their derivatives have been determined on the state of the solidification and crystallization curves using the metode simultaneous recording ATND.
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Content available remote Szacowanie kosztów zapewnienia jakości stopów z wykorzystaniem systemu "Arena"
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PL
W pracy przedstawiono wykorzystanie programu ARENA do symulacji procesu produkcyjnego, przykładowo wytapiania i odlewania staliwa, monitorowanego autorskim programem komputerowym pod względem zgodności z wymaganiami technologicznymi. Na podstawie danych z symulacji określono wartość odpowiednich składników kosztów jakości i kosztów międzywydziałowych związanych z usuwaniem niezgodności z technologią przygotowanego staliwa.
EN
It present use of ARENA for simulation of production system for example of melting and casting of cast steel, in respect of acceptability status monitored technological method of thermal and derivative analysis with author software. Value of component of costs of proper quality define of base from simulation data and with deletion of incompatibility with technology prepared interdepartment costs of cast steel.
PL
W artykule omówiono wpływ węgla, chromu i innych pierwiastków na przebieg krzepnięcia i krystalizacji staliwa średnio chromowego oraz przedstawiono możliwość wykorzystania metody ATD do szybkiej oceny podstawowych pierwiastków wchodzących w skład tego staliwa.
EN
The paper presents the influence of carbon, chromium and other elements on solidification and crystallization process of mid chromium cast iron as well as ATD method application for quality assessment of a/m cast iron base elements.
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Content available remote Determination of impact strength of AK9 silumin on base of ATND method
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tom Vol. 8, iss. 1 spec.
269--272
EN
In order to obtain the best possible materials structure for a given requirements, taking full advantage of knowledge on theories of crystallization to control of technological processes becomes a substantial factor during production of castings. Knowledge on run of the processes is a source of information for development of technology to preparation of liquid metal and to control of preparation of alloys within industry. A method of Thermal-Voltage-Derivative Analysis (ATND), developed in the Faculty of Chipless Forming Technology enables registration of temperature and voltage curves, on which one can observe a thermal and voltage effects being result of crystallization of phases and eutectic mixtures seen on these curves in form of characteristic “peaks”. Temperature value read offs for these characteristic points become a basis to regression analysis aimed at obtaining a mathematical dependences illustrating effect of changes of these values on change of impact strength of AK9 alloy. The paper presents crystallization curves of the investigated alloy registered with use of the ATND method and shows results of regression analysis aimed at determination of correlation between values of characteristic points on crystallization curve (ATND method) and KCV impact strength of the investigated alloy. It has enabled to describe significantly by equation, estimated impact strength of AK9 alloy, basing on characteristic points of the ATND method in laboratory conditions at significance level of [...] = 0,05.
PL
Istotnym czynnikiem w produkcji odlewów staje się wykorzystanie teorii procesów krystalizacji do sterowania procesami technologicznymi, w celu uzyskania najlepszej struktury materiału dla konkretnych wymagań. Znajomość przebiegu tych procesów jest źródłem informacji dla rozwoju przygotowania ciekłego metalu oraz kontroli przygotowania stopów w przemyśle. Metoda Analizy Termiczno-Napięciowo-Derywacyjnej opracowana w Zakładzie Technologii Bezwiórowych pozwala na rejestracje krzywych temperaturowych i napięciowych, na których można zaobserwować efekty cieplne i napięciowe będące skutkiem krystalizacji faz i eutektyk, występujące na tych krzywych w formie charakterystycznych „pików”. Wartości temperatury i napięcia odczytane dla tych punktów charakterystycznych stają się podstawą do podjęcia analizy regresji dla uzyskania zależności matematycznych przedstawiających wpływ zmian ich wielkości na zmianę udarności stopu AK9. W artykule przedstawiono zarejestrowane krzywe krystalizacji badanego stopu za pomocą metody ATND oraz wykorzystano analizę regresji w celu ustalenia korelacji pomiędzy wartościami punktów charakterystycznych z krzywych krystalizacji (metoda ATND) i udarnością KCV badanego stopu. Pozwoliło to na opisanie w sposób istotny równaniem szacującym udarność stopu AK9 na podstawie punktów charakterystycznych metody ATND w warunkach doświadczalnych przy poziomie istotności [...] = 0,05.
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Content available remote Identification of AG10 alloy's mechanical properties on base of ATND method
84%
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2007
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tom Vol. 7, iss. 1
135-138
EN
Knowledge about run of crystallization process of alloys constitutes a source of information on development of a new technology to prepare liquid metal and to control of preparation process of alloys within industry. Complicated shapes and big differences in wall thickness of castings made from Al-Mg alloy and their behavior under changing loads require elaboration and implementation of a methods enabling determination of mechanical properties of the alloys on preparation stage before casting process. The paper presents application of simultaneous ATND method (thermal-voltage derivative analysis) in determination of mechanical properties of AG10 alloy. Investigated alloy was melted in electric resistance furnace, and next, one has performed registration of crystallization with use of ATND method and regression analysis aimed at elaboration of equations to determine mechanical properties of the investigated alloy. Obtained mathematical dependencies enable prompt check of the mechanical properties of the alloy as early as in stage of its preparation. The research performed in laboratory conditions needs verification in industry conditions with targeted production of automated control stand.
14
Content available remote Crystallization analysis of AlMg (AG 10) alloy with use of ATND method
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EN
The paper presents results of non-ferrous metal crystallization research with use of ATND method. The research was carried out in the Faculty of Chipless Forming Technology, University of Bielsko-Biała. The new method of analysis of non-ferrous metals alloy crystallization assures complete picture of generated structural components of the alloy. Structural components defined in the tested alloy using ATND method have been verified by X-ray microanalysis, which unambiguously has confirmed their presence. Below are presented results of the crystallization analysis with ATND method in graphic form (crystallization diagrams). In crystallization diagrams of AG10 alloy there were shown curves (thermal curve with its derivative, voltage curve and its derivative). Individual structural components crystallizing in the tested alloy are reflected on curves of the method in form of characteristic peaks. The research was carried out on AG10 aluminum-magnesium cast alloy. Moreover, the paper shows the structures of the tested alloy together with marked structural components, identified with use of X-ray microanalysis.
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