Application of the new materials in the automotive industry is a challenge that is placed in front of researchers of our times. The challenge is reflected in the modification of the chemical composition of steel and heat treatment in order to achieve improved mechanical properties. Steel 17-7PH is austenitic - martensitic steel with ...

By Belma Fakić, Diana Ćubela, Mihyar Noureldin Mahmoud

Dimensional tolerances of semi-products for the automotive industry became extremely narrow, and allow no deviations in the production process. In present research work the distortion behaviour of C15E (1.1141) and 42CrMo4 (1.7225) steels during two common industrial heat treatments (quenching and controlled heating and cooling) was ...

By Damir Česnik, Matej Rustja, Milan Bizjak, Blaž Karpe

The paper presents comparison of microstructure and hardness of Cu-Al-Ni shape memory alloy before and after heat treatment (quenching at 900°C/60 min/water and tempering at 300°C/60 min/water). Microstructural analysis was obtained by optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy dispersive spectrometr...

By Mirko Gojić, Ivana Ivanić, Stjepan Kožuh, Milenko Rimac, Omer Beganović, Kemal Begović Begović, Borut Kosec

This study is about possibility of the production of CEM I 52,5 in cementplant Kakanj satisfying some requirements for cement quality issued by EN 197-1. By EN 197-1, CEM I 52,5R consists of 95-100 % clinker and minor additional constituents of 0 - 5 %. Fly ash and granulated blast furnace slag are used as minor constituents in this study. The lowe...

By Ilhan Bušatlić, Nadira Bušatlić, Nevzet Merdic, Nedzad Haračić, Amila Music

The main characteristic of hydrotechnical cement, which is used to build massive structures, is the low heat of hydration. In this work is examined the effect of the electrofilter ash with a high content of calcium oxide addition on the hydration heat of Portland cement. The cement samples containing 0% to 50 % fly ash from TPP „Kakanj“...

By Ilhan Bušatlić, Nevzet Merdic, Nadira Bušatlić, Asim Ibrahimagić, Azra Smajić

In order to determine the possibility of using recycled aggregate for concrete production, properties of recycled aggregate and limestone aggregates: particle size distribution, oven-dried particle density, saturated and surface dried particle density and apparent particle density, water absorption, resistance to fragmentation and impact resistance...

By Adnan Mujkanovic, Marina Jovanović, Adela Telalović, Almir Bajraktarević, Adis Ćatić

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

The study examined adsorption of Reactive Violet 5 (RV-5) textile dye from the aqueous environment on MFI zeolites as adsorbents at 283, 293 and 303 K. The reaction was observed on the original NH4ZSM-5 zeolite, a product of the Zeolyst International American company, and on the modified HZSM-5 zeolite. The concentration of dye before and after the...

By S. Sladojević, D. Bodroža, J. Penavin Škundrić, Z. Levi, Lj. Vasiljević, B. Škundrić

In Europe and the world number of companies and institutions which in development strategies include social responsibility strategies is bigger every day. It is a response to market demands and pressures of economic and social community on the issue of environmental protection. Corporate social responsibility is the responsibility of the company as...

By Neira Delić, Milenko Rimac, Mirsada Oruč

Today global steel producers give increased emphasis on protecting the environment and deploy into production and supporting the activities of the so-called concept of sustainable development, which is reflected particularly in the implementation of environmental management systems. In the work a short review of the World and Slovenian steel produc...

By Borut Kosec, Igor Budak, Gorazd Kosec, Erika Vidic, Zorana Tanasić, Mirko Soković