The practical objective of this paper was based on improving the cleanliness of forging ingots, improving the ingots yield by the reduction of ingot head, taking the example carbon steels produced in Steelwork Zenica In that sense, the modification of existing technologies has been done in the segment of secondary metallurgy dur...

By Omer Kablar, Aida Mahmutović, Menzur Plaćo, Šaban Žuna

FeCrAl alloys are used in a wide range of resistance and high-temperature applications such as wire heaters, furnace structure parts, etc. Their oxidation resistance at elevated temperatures relies on the formation of a thin and a continuous Al2O3 layer on the alloy surface. Growth and thickness of the protective Al2O3 layer depends ...

By Stojana Vesković, Janez Kovač, Peter Panjan, Damjan Klobčar, Milan Bizjak, Blaž Karpe

This paper examines the impact of charging wet and oxidized material on the quality of cast iron, quality SL20. In consideration were taken the same products obtained from 3 melts. For the production of the first melt wet and oxidized charging components in quantity of 60 % were used, for the second one quantity of 20 % of oxidizied ...

By Ajla Huseljić, Aida Mahmutović, Hasan Avdušinović

Ductile iron is a pseudo-binary alloy of iron and carbon where the carbon is precipated in the form of nodules (spherical) graphite. The ductile iron, thanks to the specific form of graphite, has a good combination of properties such as elongation, yield strength, good toughness, castability and mechanical workability. Except of grap...

By Almaida Gigović-Gekić, Emana Đananović, Hasan Avdušinović

Stainless steel plays an important role in all emerging technologies. Detrimental effects of inclusions in steel do not only depend on their sizes, shape, distribution, but also on their chemical composition and mechanical properties. For this reason, the control of formation of non metallic inclusions and the characterization presen...

By Derviš Mujagić, Aida Mahmutovic, Mustafa Hadžalić, Amna Karić

This paper examines the impact of improving working conditions and increasing capacity with Dual track system. Three different cases were examined: Power ratio 100-650 kW, 200-550 kW and 300-350 kW. All three different cases were obtained in very similar conditions (time necessary for chemical analysis, alloying processes, slag cleaning e...

By Šehzudin Dervišić, Sedad Mušinović, Ajla Huseljić

Cu-alloys have been intensively studied because of their high thermal conductivity, good electrical and shape memory properties and low cost. Cu-Al-Mn alloys show a higher ductility and elongation in relation to the other Cu-based alloys, as well as a good potential for a cold drawing. Therefore, the investigation of these alloys is ...

By Tamara Holjevac-Grgurić, Dragan Manasijević, Dragana Živković, Ljubiša Balanović, Stjepan Kožuh, Robert Pezer, Ivana Ivanić, Ivan Anžel, Borut Kosec, Ladislav Vrsalović, Mirko Gojić

Austempering is two steps heat treatment process that, when applied to ductile iron, produces components that have properties superior to those processed by conventional treatment. Depending to chosen heat treatment parameters different final properties of the casting are obtained. In this paper heat treatment parameters for producti...

By Hasan Avdušinović, Almaida Gigović-Gekić

Based on microscopic (exciton) theory of optical properties of symmetrically perturbed ultrathin molecular films, the absorption, reflection and transparency indices were formulated and presented in the function of frequencies of external electromagnetic field in near IR region. It has been showed that all optical properties depend o...

By Siniša Vučenović, Dragana Rodić, Jovan P. Šetrajčić

Nanometalic materials are at the present moment the most commercialized class of nanomaterials. Methods for their synthesis and exploitation of the physical phenomena of their behaviour on atomic level are ever-expanding. Their prices are sometimes too high and in lowering the price, finding the new recourses of raw materials, would ...

By Suzana Gotovac-Atlagić, Siniša Vučenović, Toni Nikolić, Anđela Tomić, Dragana Stević