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Institute Kemal Kapetanović, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of engineering and natural sciences, University of Zenica , Zenica , Bosnia and Herzegovina
Institute Kemal Kapetanović, University of Zenica , Zenica , Bosnia and Herzegovina
Faculty of engineering and natural sciences, University of Zenica , Zenica , Bosnia and Herzegovina
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 present the basis of improvement of steel product properties and lead to
sustainable development in design of new steel grades. In order to produce steels with better
machinability, such as AISI 303 grades, a modification of inclusions with carefully designed chemical
composition is presented. In this work detailed SEM/EDS analyses of inclusions – manganese
sulphides modified by zirconium are presented. Also, the results of tests of machinability (cutting
force and surface roughness) and impact energy for the melt without additions of alloying elements
and with the addition of zirconium are presented.
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