Ratio of ultimate tensile strength and yield stress shows lower values in cold drawn wire than in hot rolled state. The results of research addressing the effect of variations in chemical composition of continuous casted billets on mechanical properties of cold-formed wire used in production of steel mesh are presented. In the c...

By Šaban Žuna, Aida Mahmutovic, Faik Uzunović, Sead Spužić

KAB steels are a newly developed grade of advanced ultra high strength steels, which distinguish themselves by the rapid formation of fine nanostructured carbide free lower bainite. The term nanostructured is used with respect to the thickness of the individual bainitic ferrite plates which can vary between 50 nm to as fine as a few ...

By Peter Kirbiš, Mihael Brunčko, Ivan Anžel

The austenitization is first operation at most operations of heat treatment, and it is implied heating steel on the austenitizing temperature and holding at this temperature while are not achieved completely transformation origin microstructure in austenite. Two base parameters which implicate at effect of austenitization are austeni...

By Armina Bašić, Almaida Gigović-Gekić, Hasan Avdušinović, Mustafa Hadžalić

Phase diagram of the Al-Sn-Ga ternary system was calculated using optimized thermodynamic parameters for binary sub-systems based on CALPHAD method. Four vertical sections were calculated: Ga0.5Sn0.5-Al, Al0.5Sn0.5-Ga, Al0.5Ga0.5-Sn, and Al0.9GaSn0.1-Ga. Calculated liquidus projection of the Al-Sn-Ga ternary system and isothermal sec...

By Ljubiša Balanović, Dragana Živković, Dragan Manasijević, Jožef Medved, Maja Vončina

In the city of Zenica steel is continuously produced more than 120 years. In all technological stages of production and processing of steel within integrated steel works large amounts of raw materials and fuels which contain a certain amount of sulfur are consumed. The flue gases formed during production and processing of steel contain certain conc...

By Sulejman Muhamedagić, Mirsada Oruč, Halim Prcanović

The main objective was to reduce: the time of the bus stops, the time for administrative actions of drivers, fuel consumption, air pollution emissions of SO2 and increase the solvency of the company. For the realization of the objectives set was needed: to introduce electronic billing system with the use of contactless - chip cards. All vehicles ar...

By Jusuf Borić

Final product of the cold forming process gain many advantages that are mostly produced by strengthening of the material in the process. Those advantages are primarily explained as improving mechanical characteristic of the work material. Forward cold flow forming is among those processes and it is mostly related to (forming) shaping...

By Sabahudin Ekinović, Ibrahim Plančić, Edin Begović, Himzo Đukić, Branka Muminović

For the production of vertically perforated bricks with very good thermal insulation properties it is necessary to increase porosity of ceramic body. The most effective way to achieve this is the addition of organic substances into the clay mass. During the firing process combustion of these substances occures, leaving behind a large number of fine...

By Adnan Mujkanovic, Marina Jovanović

Manufacture of pulp for making paper and paperboard in the world has a rapid growth. The need for paper and cardboard is constantly increasing, but the limiting factor is the lack of raw materials - biomass. As a result, there has been a technological orientation to new types of raw materials, which, along with a modified chemical processing proced...

By Salim Ibrahimefendić, Amra Tuzović, Marija Garić

Some laboratory enquire has been made on relating correlation main physical-mechanical characteristics of prepared leather where in producing process use mineral as well as herbal tans. It’s well known that use of herbal tans in producing leather has justification in aspect of environment protection issues and health protection. Experimental ...

By Šefkija Botonjić, Merima Haseljić