Austempered ductile iron is the last addition to the group of ductile irons obtained by isothermalimprovement of classic ductile iron. Austempered nodular cast iron has improved mechanicalproperties and a different matrix microstructure compared to known iron-based castings. Thistype of casting is obtained by isothermal improvement - austempering, ...

By Adisa Burić, Belma Fakić, Edib Horoz, Hasan Avdušinović, Raza Sunulahpašić

Steel cooling is an important technological operation because the final microstructure of the steel,and therefore its properties, depends on the cooling rate. The speed of steel cooling depends onnumerous factors, one of which is the movement of the cooling media. This paper presents theresults of testing the influence of mixing the cooling media o...

By Almaida Gigovic-Gekic, Hasan Avdušinović, Amna Hodzić, Branka Muminović

Gray cast iron belongs to the group of iron casts that contain graphite particles in the microstructure. Graphite particles in gray cast iron have the shape of lamellae and are connected to each other. The specific combination of properties of gray cast iron, which is satisfactory for many applications, and simple and cheap productio...

By Anida Henjaković, Hasan Avdušinović, Amir Muslić

The chemical composition of casting is an important factor affecting the shape of graphite and the mechanical properties and microstructure of the metal base. Different elements have different influence to casting properties. All elements that affect the microstructure development during casting solidification have significant influence on mechanic...

By Aida Imamović, Hasan Avdušinović, Anida Henjaković

Steel 67SiCr5 is a alloyed carbon steel usually used for production of springs. It is used for load bearing springs, ring-shape springs, spiral springs, anti vibration springs etc. Springs steels are usually distribute in annealed or hardened and tempered state. Heat treating could be performed before or after springs forming. In this article, the ...

By Almaida Gigović-Gekić, Jusuf Duraković, Hasan Avdušinović

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

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

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

In the process of production of iron and steel substantial amounts of fuel and raw materials are consumed. Metallurgical coke as fuel, reducing agent and material that provide gas flow trough blast furnace processes must possess certain properties in terms of strength, due to expected changes in the conditions of high temperature environment. Deman...

By Sulejman Muhamedagić, Hasan Avdušinović