20.500.12556/RUL-95583 Določanje toplotnih lastnosti eksotermno-izolacijskih materialov Thermal properties determining of exothermic-insulating materials V okviru magistrskega dela smo raziskovali področje toplotnih lastnosti eksotermno-izolacijskih materialov, ki se uporabljajo kot pomožni materiali pri ulivanju jekla ter drugih kovin. Za pravilno dimenzioniranje velikosti eksotermnih oziroma izolacijskih oblog, ki omogočajo kontrolirani potek strjevanja, je potrebno določiti sproščeno toploto med eksotermnim delovanjem in izolacijski učinek materiala. Za doseganje ustreznih toplotnih lastnosti v procesu izdelave je potrebno uvesti procesno kontrolo izdelkov. Industrijska kontrolna metoda Exoprobe za določanje toplotnih lastnosti v podjetju EXOTERM-IT d.o.o. je primer tovrstne naprave, ki smo jo tekom magistrskega dela optimirali in umerili. Za potrebe določanja toplotnih lastnosti materiala smo izdelali aparaturo za DTA, jo umerili in rezultate analiz eksotermno-izolacijskega materiala primerjali z rezultati meritev DTA na aparaturi STA 449 Jupiter. Na podlagi rezultatov smo ugotovili, da izdelana aparatura pravilno prikaže temperaturna območja reakcij, ne pa tudi površin vrhov, preko katerih bi lahko umerili energijsko vrednost posamezne reakcije. Eksotermno-izolacijske materiale smo analiziral tudi na industrijski kontrolni metodi Exoprobe, ki je učinkovita metoda za določanje toplotnih lastnosti in delovanja teh materialov v praksi. Njena prednost je velik vzorec, kar zagotavlja večjo reprezentativnost, kot jo ima večina drugih metod, omogoča pa tudi vizualno analizo vzorca med delovanjem. Metoda Exoprobe je tako primerna za uporabo kot industrijska kontrolna metoda pri končni kontroli izdelanih materialov, lahko pa se jo koristno uporabi tudi pri razvoju eksotermno-izolacijskih materialov. In this paper, our findings regarding the heat properties of exothermal isolation materials are presented. These materials are used as accessory materials in the process of casting steel and other metals. To properly gauge the right amount of exothermal or isolation coatings, which allow a controlled solidification process, the amount of heat released during the exothermal reaction as well as the isolating effect of the material need to be specified. To achieve certain heat properties during the process, introducing procedural control is necessary. The industrial process control method Exoprobe, used for measuring the heat properties in the company EXOTERM-IT LLC, an example of such a machine, was optimised and calibrated for the duration of our project. For the purposes of finding the heat properties of the material, a DTA apparatus was made and calibrated. The results of the analyses of the exothermal isolating material were compared with the results of the DTA measurements, performed on the STA 449 Jupiter apparatus. Based on our findings, the new apparatus accurately shows the temperature areas of the reactions, but not the surface of the peaks, through which the energy value of a single reaction could be measured. Exothermal isolation materials were also analysed by an industrial process control method Exoprobe, which is an efficient method for measuring the heat properties and the behaviour of the material in practice. Its advantage is a large sample size, providing more representative results compared to most other methods, as well as enabling the visual analysis of a sample during the activity. The Exoprobe method is therefore suitable for use as an industrial control method with the final testing of materials and can also be used when developing exothermal isolation materials. Eksotermno-izolacijski materiali toplotne lastnosti DTA industrijska kontrolna metoda Exoprobe Exothermal isolation materials heat properties DTA industrial process control method Exoprobe true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-09-21 07:15:37 2017-09-21 07:15:45 2022-08-10 06:34:12 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 57403 432.pdf 432.pdf 1 299BB4FF9D604DF2FF4DFDC23894FD85 b245b96d1763aee7f5dab9d0483cf591bed726090d0cbc2d7ebf4e57bc77f63c caf5b563-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/eab2f7d2-9547-41ac-9aa0-2569e77aead9 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=104200 Naravoslovnotehniška fakulteta 0 0 0