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1

The Effect of Successive Stages of the Melting Process on the Nucleation of Ductile Cast Iron

Kołakowski Jakub, Brzeżański Mateusz, Burdzy Daniel, Sobieraj J., Urbanowicz M., Paruch T., Janerka Krzysztof

Archives of Foundry Engineering

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2023

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Vol. 23, iss. 1

61--67

EN

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.

2

Crystallization of GX2CrNiMoCuN 25-6-3-3 Grade Alloy Cast Steel and its Microstructure in the As-cast State and After Heat Treatment

Wróbel Tomasz, Jurczyk Paweł, Baron Czesław, Nuckowski Paweł M.

Archives of Foundry Engineering

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2023

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Vol. 23, iss. 3

94--103

EN

The paper presents the results of research conducted in the field of crystallization and microstructure of duplex alloy cast steel GX2CrNiMoCuN 25-6-3-3 grade. The material for research was the above-mentioned cast steel with a chemical composition compliant with the relevant PN-EN 10283 standard, but melted at the lowest standard allowable concentration of alloying additives (some in short supply and expensive), i.e. Cr, Ni, Mn, Mo, Cu and N. The analysis of the crystallization process was performed based on the DTA (Derivative Thermal Analysis) method for a stepped casting with a thickness of individual steps of 10, 20, 40 and 60 mm. The influence of wall thickness was also taken into account in the cast steel microstructure testing, both in the as-cast state and after solution heat treatment. The phase composition of the cast steel microstructure was determined by using an optical microscope and X-ray phase analysis. The analysis of test results shows that the crystallization of tested cast steel uses the ferritic mechanism, while austenite is formed as a result of solid state transformation. The cast steel under analysis in the as-cast state tends to precipitate the undesirable σ-type Fe-Cr intermetallic phase in the microstructure, regardless of its wall thickness. However, the casting wall thickness in the as-cast state affects the austenite grain size, i.e. the thicker the casting wall, the wider the γ phase grains. The above-mentioned defects of the tested duplex alloy cast steel microstructure can be effectively eliminated by subjecting it to heat treatment of type hyperquenching.

3

Synthesis and characterization of Li2MnO3 nanoparticles using sol-gel technique for lithium ion battery

Chennakrishnan Sandhiya, Thangamuthu Venkatachalam, Subramaniyam Akshaya, Venkatachalam Viknesh, Venugopal Manikandan, Marudhan Raju

Materials Science Poland

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2020

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Vol. 38, No. 2

312--319

EN

Nanoparticles of Li2MnO3 were fabricated by sol-gel method using precursors of lithium acetate and manganese acetate, and citric acid as chelating agent in the stoichiometric ratio. TGA/DTA measurements of the sample in the regions of 30 °C to 176 °C, 176 °C to 422 °C and 422 °C to 462 °C were taken to identify the decomposition temperature and weight loss. The XRD analysis of the sample indicates that the synthesized material is monoclinic crystalline in nature and the calculated lattice parameters are 4.928 Å (a), 8.533 Å (b), and 9.604 Å (c). The surface morphology, particle size and elemental analysis of the samples were observed using SEM and EDAX techniques and the results confirmed the agglomeration of nanoparticles and, as expected, Li2MnO3 composition. Half cells of Li2MnO3 were assembled and tested at C/10 rate and the maximum capacity of 27 mAh/g was obtained. Charging and discharging processes that occurred at 3 V and 4 V were clearly observed from the cyclic voltammetric experiments. Stability of the electrodes was confirmed by the perfect reversibility of the anodic and cathodic peak positions observed in the cyclic voltammogram of the sample. The Li2MnO3 nanoparticles exhibit excellent properties and they are suitable for cathode materials in lithium ion batteries.

4

The Influence of Selected Melting Parameters on the Physical and Chemical Properties of Cast Iron

Petrus Ł., Bulanowski A., Kołakowski J., Brzeżański M., Urbanowicz M., Sobieraj J., Matuszkiewicz G., Szwalbe L., Janerka K.

Archives of Foundry Engineering

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2020

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Vol. 20, iss. 1

105--110

EN

This paper presents the problems related to smelting gray and ductile cast iron. Special attention is paid to the metallurgical quality of cast iron. It depends on the type of furnace, charge materials and the special combination of charge, overheating and holding temperature, melting time, modification and spheroidization method. The evaluation of metallurgical quality has been performed by using derivative-thermal analysis (DTA). During the smelting process and secondary metallurgy, the ITACA system was used allowing to obtain information on alloy characteristic temperatures (Tliquidus, TeMin, TeMax, Tsolidus), VPS value, recalescence value, IGQ coefficient, nucleation gauge, porosity etc. The results of investigations and calculations are displayed in the form of graphs and dependencies. It has been shown that the derivative-thermal analysis (DTA) is an effective complement of chemical analysis and it has been found that both the increase in temperature and metal holding time have a negative impact on the metallurgical quality of liquid metal. The metallurgical quality can be improved by using proper composition of charge materials and modifiers.

5

Analiza termo-optyczna (TOA) jako narzędzie badań zjawisk topnienia

Galewski Zbigniew, Korbecka Izabela, Osiecka-Drewniak Natalia

Wiadomości Chemiczne

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2019

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[Z] 73, 3-4

202--220

EN

In the work, after preliminary discussion of the complexity of the phenomenon of melting chemical compounds, two basic research methods are presented: calorimetric methods and thermooptical method. The physical basis of the five main calorimetry techniques is now detailed (adiabatic calorimetry, differential thermal analysis – DTA, differential scanning calorimetry with heat compensation – DSC heat compensated, differential scanning calorimetry with heat flow – DSC heat flux and differential scanning calorimetry with temperature modulation – MDSC) and thermo-optical techniques used in phase transitions investigations. The advantages and disadvantages of these methods are shown in numerous examples and the accuracy attainable by the individual measuring techniques is compared.

6

Sekwestracja CO2 w betonie w procesie karbonatyzacji w ujęciu normy PN-EN 16757:2017-07

Witkowski H.

Materiały Budowlane

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2018

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nr 2

46--49

PL

Zagadnienie sekwestracji CO2 w betonie w procesie karbonatyzacji nabiera w ostatnim czasie coraz większego znaczenia. Wynika to z faktu, iż coraz częściej zarówno konstrukcja, jak również zastosowane materiały są analizowane pod kątem ich całkowitego śladu węglowego. W artykule przedstawiono wyniki badań procesu karbonatyzacji betonu SCC C30/37 w formie gruzu betonowego frakcji 8 – 31,5 mm w komorze karbonatyzacyjnej przez okres 56, 112 i 168 dni. Próbki zostały poddane analizie spektrofotometrycznej FTIR (Fourier Transformation Infrared Spectroscopy). Następnie próbki badane przez 168 dni poddane zostały analizie termicznej TG/DTA (Thermogravimetric/Differential Thermal Analysis) w celu określenia ilości zaabsorbowanego CO2. Otrzymane wyniki zostały odniesione do maksymalnej teoretycznej ilości zaabsorbowanego CO2 wg normy PN-EN 16757-07.

EN

Issue of CO2 sequestraion in the carbonation process has become a crucial problem. This is due the fact, that construction and applied materials are analyzed in the terems of their total carbon footprint. Resutls of research on carbonation of SCC (Self-Compacting Concrete) C30/37 in the form of concrete rubble, in fraction 8 – 31,5 mm, kept for 56, 112 and 168 days have been presented in the paper. Samples were investigated with FTIR (Fourier Transformation Infrared Spectroscopy) analysis. Next, samples kept for 168 days were analyzed with thermal analysis TG/DTA (Thermogravimetric/Differential Thermal Analysis) to determine the amount of absorbed CO2. The obtained results were referred to the formula for the maximum theoretical CO2 uptake according to PN-EN 16757-07.

7

Partial crystallization of the erbium/ytterbium co-doped oxyfluoride glass

Plewa J., Augustyn E., Żelechower M.

Inżynieria Materiałowa

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2018

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Vol. 39, nr 6

204--214

EN

Erbium/Ytterbium co-doped oxyfluoride glass-ceramics can be applied as the optical fiber core. For that reason its crystallization kinetics is described in terms of the JMAK model (Johnson-Mehl-Avrami-Kolmogorov) with later updates. Differential Thermal Analysis (DTA) measurements of glass and glassceramics powders (with size comparable to the diameter of multimode optical fiber core) combined with X-ray diffraction (XRD) measurements enables both the identification of growing nanocrystals structure and determination of the specific annealing parameters. This specific glass powder annealing results in the desired microstructure of glass-ceramics fibers (nanocrystals embedded in the glassy host).

PL

Zamiarem autorów było precyzyjne określenie warunków wygrzewania włókien optycznych ze szkieł tlenofluorkowych, współdomieszkowanych erbem i iterbem, przeznaczonych na rdzenie aktywnych światłowodów wielodomowych. Pożądana, finalna mikrostruktura włókien to jednorodnie rozłożone w matrycy szklistej nanokryształy wzbogacone w erb i iterb. Ponieważ średnica rdzeni włókien wielodomowych jest standaryzowana (50, 62,5 lub 100 μm), do badań użyto frakcji proszków szkieł o rozmiarach 45÷100 μm.

8

Susceptibility of Alloy IN617 to Hot Cracking

Konieczna N., Adamiec J.

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2018

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Vol. 62, No. 4

45--51

EN

The article presents results of tests concerning the susceptibility of alloy IN617 to hot cracking. The research-related tests required the inert gas-shielded melting of test alloy sheets using a tungsten electrode in forced strain conditions. The process of melting involved 3 mm and 5 mm thick test sheets. The tests of the welded joints included the macro and microstructural analysis of the molten area, base material and heat affected zone. Results obtained in the DTA differential analysis were used to perform tests using a Gleeble 3800 simulator. In the above-presented manner it was possible to determine the high-temperature brittleness range (HTBR) of alloy IN617 as well as to identify the effect of strains on the development of hot cracks in the Transvarestraint test. The tests were supplemented with the fractographic analysis of the crack area. It was revealed that the hot cracking phenomenon occurred within the high-temperature brittleness range of the alloy and depended on the size of strain as well as on the presence of eutectics formed in the solid-liquid state.

PL

Przedstawiono wyniki badań skłonności stopu IN617 do pękania gorącego. W tym celu wykonano próby przetopienia płyt z badanego stopu elektrodą wolframową w osłonie gazu obojętnego w warunkach wymuszonych odkształceń. Proces przetapiania prowadzony był na płytach próbnych o grubości 3 i 5 mm. Badania złączy spawanych obejmowały analizę makro- i mikrostruktury przetopienia, materiału rodzimego i strefy wpływu ciepła. Na podstawie uzyskanych wyników z analizy różnicowej DTA przeprowadzono badania na symulatorze Gleeble 3800. W ten sposób wyznaczono zakres kruchości wysokotemperaturowej (ZKW) stopu IN617, a także określono wpływ odkształceń na rozwój pęknięć gorących w próbie Transvarestraint. Uzupełnieniem badań była wykonana analiza fraktograficzna obszaru pęknięcia. Wykazano, że zjawisko pękania gorącego zachodzi w zakresie kruchości wysokotemperaturowej stopu i zależy od wielkości odkształcenia oraz obecności eutektyk tworzących się w stanie stało-ciekłym.

9

The Analysis of AISI A3 Type Ferritic-Austenitic Cast Steel Crystallization Mechanism

Stradomski G.

Archives of Foundry Engineering

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2017

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Vol. 17, iss. 3

229--233

EN

High-alloy corrosion-resistant ferritic-austenitic steels and cast steels are a group of high potential construction materials. This is evidenced by the development of new alloys both low alloys grades such as the ASTM 2101 series or high alloy like super or hyper duplex series 2507 or 2707 [1-5]. The potential of these materials is also presented by the increasing frequency of sintered components made both from duplex steel powders as well as mixtures of austenitic and ferritic steels [6, 7]. This article is a continuation of the problems presented in earlier works [5, 8, 9] and its inspiration were technological observed problems related to the production of duplex cast steel. The analyzed AISI A3 type cast steel is widely used in both wet exhaust gas desulphurisation systems in coal fired power plants as well as in aggressive working environments. Technological problems such as hot cracking presented in works [5, 8], with are effects of the rich chemical composition and phenomena occurring during crystallization, must be known to the technologists. The presented in this work phenomena which occur during the crystallization and cooling of ferritic-austenitic cast steel were investigated using numerical methods with use of the ThermoCalc and FactSage® software, as well with use of experimental thermal-derivative analysis.

10

Sulfate resistant concrete with aluminosilicate additives

Pryymachenko A., Sheinich L.

Architecture Civil Engineering Environment

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2017

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Vol. 10, no. 4

101--106

EN

The paper observes an improvement of the sulphate resistance of concrete. This was achieved through creation of dense concrete structure with sulphate resistant binder matrix. Series of tests confirms the positive effect after optimizing the sieve line, also in very fine area; reducing the water-cement ratio with superplasticizer on polycarboxylate basis and restriction of the sulphate sensitive clinker. These steps were possible through adding active aluminosilicate mineral additives. They improve fresh concrete properties, density and corrosion resistance of concrete. The chemical reasons of such effect were explained by the means of x-ray diffraction, differential thermogravimetry and scanning electron microscopy. This development should be widely used in several projects in Ukraine, where sulphate-resistant concrete is needed.

PL

W artykule poruszono kwestię wzrostu odporności betonu na korozję siarczanową. Efekt ten osiągnięto w betonie o szczelnej strukturze z zaczynem odpornym na wpływ siarczanów. Serie badań potwierdziły korzystny efekt optymalizacji krzywej uziarnienia, w tym dla najdrobniejszych frakcji; obniżenie stosunku wodno-cementowego z udziałem superplastyfikatora na bazie polikarboksylanów i ograniczenie ilości klinkieru podatnego korozji siarczanowej. Te zabiegi były możliwe dzięki dodatkom mineralnym w postaci czynnych glinokrzemianów. Poprawiają one właściwości mieszanki betonowej, gęstość i odporność betonu na korozję. Poprawę właściwości udowodniono w wyniku badań chemicznych: dyfrakcji promieni rentgenowskich, analizy termograwimetycznej różnicowej i obserwacji w skaningowym mikroskopie elektronowym. Wyniki tych badań powinny zostać użyte w wielu projektach prowadzonych na Ukrainie, gdzie wymagany jest beton odporny na korozję siarczanową.

11

Application of thermal analysis methods of in researches of fuels

Kijo-Kleczkowska A., Szumera M., Środa K.

Rynek Energii

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2016

|

Nr 5

85--94

EN

The paper presents properties and a thermal analysis of sewage sludge regarding to coal and biomass. It should be emphasized that in the Polish power industry coal is the basic fuel. However, given the variety of new legal requirements associated even if with need to reduce emissions to the atmosphere, or disposal of waste fuels, reducing their storage, biomass combustion and thermal utilization of sewage sludge and coal mule becomes extremely important. Each of these fuels has a definite specificity combustion, affecting on the kinetics and mechanism of the process. In explanation for behavior of fuels during high-temperature physicochemical process really helpful becomes their proximate and ultimate analyses. The paper takes TG-DTA-DSC analysis of different types of fuels, with respect to their different composition in the initial state. From the ecological point of view, it was important determination of heavy metal content in fuels.

PL

W pracy przedstawiono właściwości i analizę termiczną osadów ściekowych w odniesieniu do węgla i biomasy. Należy podkreślić, że w polskiej energetyce węgiel jest podstawowym paliwem. Biorąc jednak pod uwagę szereg nowych wymogów prawnych związanych z koniecznością ograniczenia emisji do atmosfery czy zagospodarowania paliw odpadowych, zmniejszając ich składowanie, spalanie biomasy i termiczna utylizacja osadów ściekowych oraz mułów węglowych staje się niezwykle ważna. Każde z tych paliw ma określoną specyfikę spalania wpływającą na kinetykę i mechanizm procesu. W wyjaśnieniu zachowania paliw podczas wysokotemperaturowego procesu fizykochemicznego pomocna staje się ich analiza techniczna i elementarna. W pracy dokonano analizy TG-DTA-DSC różnych rodzajów paliw, w odniesieniu do ich składu w stanie początkowym. Z ekologicznego punktu widzenia istotne było ponadto oznaczanie zawartości metali ciężkich w paliwach.

12

Modelowanie zjawiska zmiany trasy przejazdu w dynamicznym rozkładzie ruchu w sieci drogowej

Kucharski R., Gentile G.

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

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2014

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Nr 1(103)

245--256

PL

W artykule omówiono problem modelowania stanu sieci drogowej w następstwie sytuacji nietypowych, w szczególności w następstwie zdarzeń nieoczekiwanych (wypadków). Pokazano trudności jakie pojawiają się, gdy w dynamicznym modelu ruchu próbuje się uwzględnić reakcje użytkowników na zdarzenia nieoczekiwane. Zdefiniowano pojęcie ‘rerouting’, czyli zmianę trasy przejazdu w reakcji na informacje o zdarzeniach nieoczekiwanych i pokazano jak można je uwzględnić w dynamicznym modelu ruchu. Przedstawiono i omówiono istotę dwóch rozwiązań problemu: model przesuwającego się horyzontu, oraz model przyswajania informacji. Artykuł podsumowany jest prezentacją wyników modelu przyswajania informacji.

EN

The article addresses problem of representing rerouting phenomena within macroscopic Dynamic Traffic Assignment (DTA) framework. By rerouting we mean changing the currently chosen path, after receiving some information about an unexpected traffic event. We very broadly define here unexpected event as any relevant traffic information that is not known in advance by at least some percentage of drivers and implies changes in the perception of the supply side. We addressed the above problem twofold by a) saving and then reloading directed flows for each newly calculated demand pattern based on new information and b) handle above restricting internally within the RCM. Numerical examples show the results of the proposed models where rerouting phenomenon can be observed.

13

Recent Advances in the Study of the Initiation of Energetic Materials Using the Characteristics of Their Thermal Decomposition Part II. Using Simple Differential Thermal Analysis

Zeman S., Yan Q.-L., Elbeih A.

Central European Journal of Energetic Materials

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2014

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Vol. 11, no. 3

395--404

EN

Simple Differential Thermal Analysis (DTA), with evaluation of its output by the Kissinger method, was used in the case of emulsion explosives and, as an advanced application, for several plastic bonded explosives (PBXs). In both of these kinds of explosive the square of their detonation velocities, D2, is used as their performance characteristic. A relationship between the slope of the Kissinger equation, EaT-1, and the D2 values makes it possible to formulate a possible mechanism for the initiation of emulsion explosives. Regarding PBXs, it would seem possible to postulate a change in the detonation chemistry of plastic bonded nitramines, depending on the pressure and temperature in the zone of the detonation wave, particularly in the case of CL-20 fillers. Binders with aromatic building units in their macromolecular structure seem to be less-favoured in terms of their thermal reactivity and performance than the final PBXs. These findings document the advantages of the above-mentioned application of simple DTA.

14

Charakterystyka wybranych metod termicznych. Cz. 2

Szumera M.

LAB Laboratoria, Aparatura, Badania

|

2013

|

R. 18, nr 1

24-33

15

Assessment of the possibility of utilising waste materials from the aluminium production in the copper alloys refining processes

Bydałek A. W., Bydałek A., Biernat S., Schlafka P.

Archives of Foundry Engineering

|

2013

|

Vol. 13, iss. 4

15--20

EN

The analysis of possibilities of utilising waste materials as equivalents of substances stimulating in copper alloys refining processes was presented. The results of thermogravimetric investigations determining the refining ability of the slag with the selected waste materials from the aluminium production were discussed. The possibility of optimisation of the refining slag composition on the basis of the Slag-Prop software was indicated.

16

Zastosowanie analizy termicznej do symulacji zjawisk w procesach metalurgicznych

Stecko J., Różański P., Zalecki W.

Prace Instytutu Metalurgii Żelaza

|

2012

|

T. 64, nr 1

161-168

PL

W artykule przedstawiono przykłady wykorzystania analizy termicznej w badaniach surowców i technologii hutniczych z obszaru tematyki prac badawczych realizowanych w Zespole Procesów Surowcowych Instytutu Metalurgii Żelaza.

EN

The paper presents the examples of application of thermal analysis in the research on raw materials and metallurgical technologies in the field of the research works carried out in the Primary Processing Group of the Institute for Ferrous Metallurgy.

17

Charakterystyka wybranych metod termicznych. Cz. 1

Szumera M.

LAB Laboratoria, Aparatura, Badania

|

2012

|

R. 17, nr 6

28-34

18

Zastosowanie analizy termicznej w metalurgii żelaza

Stecko J., Różański P., Niesler M.

Hutnik, Wiadomości Hutnicze

|

2012

|

Vol. 79, nr 12

849--851

PL

W artykule przedstawiono przykłady wykorzystania analizy termicznej do symulacji rozkładu termicznego paliwa stałego i ilościowej analizy zawartych w nim składników, obróbki termicznej składników żużlotwórczych, procesów wypalania siarki, spiekania mieszanki spiekalniczej, redukcji rudy hematytowej.

EN

The paper presents the examples of application of thermal analysis to simulate decomposition of solid fuel and quantitative analysis of the components contained therein, slag formers thermal treatment, sulfur burning process, sintering of sinter mixture, hematite ore reduction.

19

Utilization of thermal analysis to thermo physical properties study of real steel grades

Klus P., Zaludova M, Gryc K., Smetana B., Michalek K., Dobrovska J., Tkadleckova M., Socha L.

Archives of Materials Science and Engineering

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2012

|

Vol. 58, nr 2

116--119

EN

Purpose: This paper deals with determining the temperatures of phase transformations in real steel grades. It also includes the study of industrially produced steel grades using the methods of thermal analysis by experimental equipment STA 449 F3 Jupiter made by NETZSCH and Setsys 18TM made by SETARAM. Design/methodology/approach: Selected methods of thermal analysis (DSC and DTA) enable to obtain the temperatures of phase transformations taking place in steel during the linear heating/cooling. Within the casting technology of steel, thermal analysis is used to determine the solidus temperature and especially the crucial liquidus temperature. Findings: Experimentally obtained solidus and liquidus temperatures are higher in the DSC method (max. 3.8°C). The difference between the temperatures of phase transformation (T) running between the solidus temperature (TS) and liquidus (TL) for both methods (DTA and DSC) differ by a maximum of 3.2°C. The results from experimental measurements were compared with theoretical calculations of liquidus and solidus temperatures by different authors and with the computed results from thermodynamic database COMPUTHERM and also with temperatures from the equilibrium phase diagram of Fe-Cr-C. Experimentally obtained solidus temperatures are lower than the calculated equilibrium solidus temperatures. Experimentally obtained liquidus temperatures are in the range of temperatures obtained using computational relations. The temperatures mentioned in the equilibrium phase diagram (diagram for a particular steel grades was not found) are higher than experimentally obtained temperatures. Research limitations/implications: The results of experimental studies can be used to refine the knowledge of basic physical properties of steel and for example replacement of the tabulated values or estimated values of phase transformation temperatures and thermal capacity. Furthermore, the obtained data will be implemented in the material databases of numerical programs used for the simulation of metallurgical processes. Originality/value: On the basis of applied research in close collaboration with industry companies, the obtained data can contribute significantly to optimize the operating conditions, thereby increasing the efficiency of the steelmaking technology and final quality of cast steel.

20

Effect of Cu addition on the GFA, structure and properties of Fe-Co-based alloy

Lesz S., Babilas R., Madej M., Nowosielski R.

Archives of Materials Science and Engineering

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2012

|

Vol. 55, nr 2

70-77

EN

Purpose: The aim of the paper was investigation of the effect of Cu addition on GFA (Glass Forming Ability), structure, magnetic and mechanical properties of amorphous Fe-Co-B-Si-Nb alloy. Design/methodology/approach: The following experimental techniques were used: differential thermal analysis (DTA), transmission electron microscopy (TEM) and X-ray diffraction (XRD) method, measurements of magnetic properties (VSM method), Vickers microhardness (HV). Findings: It was shown that when Cu is added to the Fe-Co-based alloy, increase of the GFA and change of the magnetic properties was obtained. Research limitations/implications: The results can give more details to understand the relationship between structure, magnetic and mechanical properties. Thus can be useful for practical application of these alloys. Practical implications: The (Fe36Co36B19Si5Nb4)100-xCux (x=0 and 0.6) metallic glasses due to their excellent soft magnetic properties have shown great industrial value for commercial application. Many products consisting of these kinds of metallic glasses have been widely used, for example anti-theft labels, precision sensor material, and high efficient magnetic transformers in electronic industry. Originality/value: The applied investigation methods are suitable to determine the changes of GFA and structure combined with magnetic and mechanical properties of (Fe36Co36B19Si5Nb4)100-xCux (x=0 and 0.6) metallic glasses