In modern times, the science of materials cannot be imagined without metallography. The history of metallographic testing in Bosnia and Herzegovina is primarily related to Zenica. Today, most of the research related to the metal industry in BiH is conducted in laboratories at the Kemal Kapetanović Institute in Zenica. The Institute's Metallog...

By Belma Fakić, Adisa Burić, Edib Horoz

The HK30Nb steel pipe casting was obtained by centrifugal casting. This steel is austenitic stainless steel grade AISI HK 30 and is standardized according to ASME SA-351 in as cast condition. HK 30 Nb steels not standardized i.e. it is HK 30 steel modified with niobium. In addition to the required mechanical properties, this steel is also tested fo...

By Mirsada Oruč, Alen Delić, Almaida Gigovic-Gekic, Raza Sunulahpašić

Metallurgical coke as a fuel, reducing agent and permeable material in high-pressure processes must have pronounced strength and granulation properties due to expected changes in high temperature conditions. The best quality of metallurgical coke is achieved when coal mixtures satisfy a certain range of rheological parameters. The characterization ...

By Sulejman Muhamedagić, Amina Kurtović, Azra Halilović

The ore consolidation process is a thermal process and it happens at the temperatures of the ore melting beginning, allowing the ore grains, additives and fluxes to be connected into a solid piece of sinter. The amount of carbon in the sinter mixture and the FeO content of the produced sinter affect the mechanical resistance of the sinter. Indicato...

By Sulejman Muhamedagić, Mirsada Oruč, Amna Karić

Thermal properties and microstructure of the Sn-10% Ag and Sn-20% Ag alloys were experimentally investigated in this study. Melting behavior of the alloys were studied using differential scanning calorimetry (DSC). Microstructure of the alloys was analyzed by optical microscopy. The xenon-flash method was used for the measurements of thermal diffus...

By Dragan Manasijević, Ljubiša Balanović, Ivana Marković, Duško Minić, Aleksadar Đorđević

Surface roughness is the totality of microgeometric irregularities on the surface of an object and it is caused by various factors, from which the most important are machining and processing techniques. This characteristic of the material is very important, especially in the case of high-quality materials designed for the demanding conditions of ex...

By Raza Sunulahpašić, Mirsada Oruč, Edina Karić

In this paper were investigated the effect of hydrochloric acid concentration and addition of oxidizing agents on the rate of general corrosion of copper.For comparison, the corrosion rate in distilled water was also tested.Taffel extrapolation method was used for investigation of general corrosion of copper. Taffel extrapolation method implies sca...

By Farzet Bikić, Dejana Kasapović

The presented investigation work investigates thermal properties of the ultra-high hardness (UHH) armour steel. Steel is distinguished with high hardness and strength. It is sold in the quenched or tempered state, because achieving planned hardness which has to be between 590 HB and 640 HB. In the frame of the investigation work the analysis of the...

By Borut Kosec, Tjaša Kranjec, Blaž Karpe, Aleš Nagode, Milan Bizjak, Jure Bernetič, Mirko Gojić, Zijah Burzić, Milan Rimac, Gorazd Kosec

Some specific aspects in the improvement processes related to I-beams production, especially related to the conversion of classical to the universal rolling mills stands are presented in this paper. One of practical solutions in the a.m. conversion is described in some more details, as well as some of better designs in the variety of I-beams, conce...

By Faik Uzunović, Omer Beganović, Lamija Sušić

The results of two light optical tomographies (LOT) of two-phase steels are presented and compared in this paper. Two-phase steels show a microstructure consisting of a carbon-rich second phase and a ferritic matrix. In this work, microstructures are compared with a martensitic and a bainitic second phase. Tomographies are very important for materi...

By Emina Vardo, Jessica Gola, Frank Mücklich