There is a significant increase in industrial applications of ferritic high-Si ductile cast irons (3 - 6%Si), such as the automotive and maritime industries, wind power technology and mechanical engineering. Ferritic high-Si ductile cast irons replace un-stable mixed ferrite-pearlite matrix, with a unique combination of high elongation, strength an...
By Iulian Riposan, Stelian Stan, Denisa Anca, Iuliana Stan, Eduard Stefan
HYDROGENATION PROCESS OF TITANIUM ALLOY FOR BIOMEDICAL PURPOSES
The production of titanium is very expensive, so it is interesting to research technologiesthat require lower costs, such as the HDH hydrogenation-dehydrogenation processtechnology, which is used for cheaper powder production from the waste material oftitanium alloys.This paper presents the hydrogenation procedure of a recycled piece of the Ti6Al7N...
By Aida Imamović, Mirsada Oruč, Šaban Žuna, Esad Hadžibulić
EFFECT OF PARTICLE SHAPE AND SIZE OF COPPER POWDERS ON THE PROPERTIES OF SINTERED PARTS
The particle shape and size of the starting powders represent the most important physicalproperties, on which the quality of the compacts and final sintered products depends. Two types ofpowder were analyzed in the paper - electrolytic copper powder with a dendritic particle shape andwater-atomized copper powder with an irregular particle shape. Th...
By Ivana Marković, Dragan Manasijević, Ljubiša Balanović, Uroš Stamenković, Milijana Mitrović, Stevan Trujić
THERMAL AND MICROSTRUCTURAL ANALYSIS OF THE LOWMELTING Bi–In–Sn TERNARY ALLOYS
Low-melting alloys, based on bismuth, indium, and tin, have found commercial use in soldering,safety devices, coatings, and bonding applications, due to their low melting point temperature ofeutectic compositions and small differences between their liquidus and solidus temperatures.Based on this, the accurate knowledge of their thermal properties s...
By Ljubiša Balanović, Dragan Manasijević, Ivana Marković, Milan Gorgijevski, Uroš Stamenković, Dajana Milkić
INVESTIGATION OF CUTTING CONDITIONS INFLUENCE ON SURFACE ROUGHNESS DURING MQL MACHINING OF STEEL
In the paper, the influence of the cutting conditions (cutting speed, feed, and depth of cut) duringthe machining of the cylindrical steel part on the surface roughness (average surface roughness-Ra) is analysed using experimental investigation. The material used in the full factorialexperimental investigation was C45 steel, a diameter of 50 mm, ma...
By Tarik Gazić, Sabahudin Ekinovic, Edin Begović, Ibrahim Plančić
SOME ASPECTS OF A METALLURGY CONSULTING IN THE INDUSTRIAL TRANSITION OF B&H
Some specific aspects of metallurgy consulting in the industrial transition of Bosnia andHerzegovina are presented in this paper. The theoretical part of the paper is mostly concerned witha short overview of ZELJEZARA ZENICA cum ARCELORMITTAL-ZENICA (AMZ) product-mixand the facilities transition, as an example of the a.m. transition, although these...
By Faik Uzunović
PARTIAL REPLACEMENT OF CEMENT WITH CALCINED CLAYS FROM CENTRAL BOSNIA
Two clays from deposits located in the region of Central Bosnia, and kaolin obtained from a localspark plug and technical ceramics factory were calcined at 800, 900, and 1000 ºC. The pozzolanicactivity of calcined raw materials was determined using the P test. Calcined clay from the depositBilalovac showed slightly better reactivity compared t...
By Marina Jovanović, Adnan Mujkanovic, Nadira Bušatlić, Nedžad Haračić, Amina Čaušević
CHARACTERISTICS OF VACUUM DISTILLATION FRACTIONS DEPENDING ON THE CHARACTERISTICS OF THE INPUT HYDROCRACKED BASE OIL RAW MATERIAL OF THE MODRIČA OIL REFINERY
Hydrocracked base oil raw material (BORM) is the basis for the production of hydrocracked baseoils (HC-base oils) in the company „Modriča Oil Refinery“, which is engaged in the production ofHC-base oils, various motor and industrial lubricating oils, and lubricating greases. Theproduction of the mentioned HC-base oils consists of four p...
By Azra Halilović, Ilhan Bušatlić, Šefkija Botonjić, Nadira Bušatlić, Edin Zolotić
THE INFLUENCE OF THE HEATING VALUE OF COALS FROM COAL MINE „GRAČANICA“ d.o.o. GORNJI VAKUF ON QUALITY OF COAL AS ENERGYSOURCE IN ENERGY PRODUCTION
Coal is the most important and widespread fuel sedimentary rock of organic origin. It is one ofthe main energy sources today and an industrial raw material for various products. Together withthe oil and other natural bitumens, it belongs to the group of fossil fuels or caustobiolite.Combustion represents one of the fundamental energy transformation...
By Azra Halilović, Šefkija Botonjić, Amila Krnjić, Lamija Sušić
THE MEASURES OF ENERGY EFFICIENCY IN NATRON-HAYAT MAGLAJ
In industries such as the chemical industry, the oil industry, the steel industry, and the pulp andpaper industry, energy systems are the basis of the production process and represent keyindicators of the profitability of the process. Energy efficiency in industry is long-term related totechnological development and the dynamics of renewal of produ...
By Nusret Imamović, Armina Čamić, Haris lepić