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1.
Inženirsko oblikovanje vodne zavese za družino rešitev kreal kreativni prostor
Sandi Munda, 2018, magistrsko delo

Opis: Magistrsko delo zajema oblikovanje in izdelavo novega produkta blagovne znamke Kreal s celotnim procesom razvoja: načrtovanje, koncipiranje, snovanje in razdelava. Produkt, ki smo ga razvili je vodna zavesa, ki nam služi kot senčen prostor in s pretakanjem vode ohlajuje in vlaži zrak v prostoru. Predstavljene so ključne zahteve in rešitve končnih konceptov, 3D modeliranje vodne zavese in izdelava prototipa v realni velikosti. Z meritvami temperature in vlage na fizičnem prototipu smo dokazali, da je uporabljen princip hlajenja in vlaženja zraka učinkovit. Tako smo razvili novi produkt družine Kreal, ki je vizualno privlačen in funkcionalno dovršen.
Ključne besede: Razvoj produkta, inženirsko oblikovanje, vodna zavesa, 3D modeliranje, meritve, modularni sistem
Objavljeno: 28.02.2018; Ogledov: 642; Prenosov: 143
.pdf Celotno besedilo (10,62 MB)

2.
Morphological and microstructural features of Al-based alloyed powders for powder-metallurgy applications
Borivoj Šuštaršič, Irena Paulin, Matjaž Godec, Srečko Glodež, Marko Šori, Jože Flašker, Albert Korošec, Stanislav Kores, Goran Abramović, 2014, strokovni članek

Opis: Besides advanced nano steels, polymers and ceramics, recently also light metals, i.e., Al, Mg and Ti based materials, have been recognized as future materials for different kinds of advanced applications. Al and its alloys have an acceptable price, excellent corrosive resistance, good mechanical and other physical properties. Therefore, they are also used in the powder-metallurgy (P/M) field. The P/M technology of Al materials is very demanding and has its own specifics compared to the sintering technology of iron and steel. A relatively large quantity of Al-based alloy powder is formed during the sand blasting of slugs and discs in the Talum Al factory, Kidričevo, Slovenia. Therefore, we analysed and investigated its practical usability for a production of advanced products using P/M technology. The formed Al-based powder was compared with the commercially available Al-based powders that are generally used for conventional sintering technology. In the first part of this paper we explain which types of Al-based powders are used for the production of sintered parts, what the required parameters are and why we considered them. Then, the results of theoretical thermodynamic analyses and investigations of the morphological and microstructural characteristics of the selected commercial Al-based powders are given, as well as their comparison with the Al powder formed during the sand blasting and its potential for P/M applications.
Ključne besede: Al-based alloy powders, morphology, microstructure, LM characterisation, SEM/EDS characterisation
Objavljeno: 17.03.2017; Ogledov: 801; Prenosov: 87
.pdf Celotno besedilo (4,85 MB)
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3.
DSC/TG of Al-based alloyed powders for p/m applications
Borivoj Šuštaršič, Jože Medved, Srečko Glodež, Marko Šori, Albert Korošec, 2014, izvirni znanstveni članek

Opis: Al-based alloyed powders, appropriate for the sintering procedure (powder metallurgy, P/M) contain the alloying elements with a high solid solubility in Al, enabling reaction and liquid-phase sintering. They are surface oxidised because of a high affinity of Al to oxygen. Besides, this type of powders contains a polymeric lubricant (wax), which reduces the friction on die walls during automatic die compaction into the final compact shape of a product. This lubricant has to be removed slowly during the first stage of sintering in order to prevent deformations and cracking of the product. Consequently, its sintering is very complex. Generally, these powders are sintered in pure nitrogen with a low dew point. The optimum sintering conditions are generally determined on the basis of light and scanning electron microscopy. The investigation can also be completed very successively with differential scanning calorimetry and thermo gravimetry. The first one allows an insight into the endo- and exothermic reactions, taking place during the heating and cooling of a compacted metal powder, and the second one allows an insight into the processes, connected with the mass loss (a reduction, a lubricant removal, etc.) or mass increase (an oxidation). The DSC/TG of three commercial Al-based alloyed powders was performed in the frame of our investigations. The results were compared with the theoretical thermodynamic-based calculations and the optimum sintering conditions were proposed.
Ključne besede: aluminium powders, sintering, differential scanning calorimetry and thermo gravimetry
Objavljeno: 15.03.2017; Ogledov: 583; Prenosov: 67
.pdf Celotno besedilo (319,52 KB)
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4.
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