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undergraduate thesis
Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:328215
Huđ, Ivan
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Huđ, I. (2023). Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:328215

Huđ, Ivan. "Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:328215

Huđ, Ivan. "Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:328215

Huđ, I. (2023). 'Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 February 2025, https://urn.nsk.hr/urn:nbn:hr:235:328215

Huđ I. Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2025 February 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:328215

I. Huđ, "Ispitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:328215

Metadata
TitleIspitivanje trošenja spiralnih svrdla prevučenih prevlakom PACVD TiN
Title (english)Wear testing of PACVD TiN coated drill bits
AuthorIvan Huđ
MentorDarko Landek (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-03-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Kada se ispituje trošenje svrdla postoji niz modela trošenja koji se uglavnom primjenjuju kod obrade metalnih materijala. Prilikom rada svrdla su izložena visokim mehaničkim i toplinskim naprezanjima te se prevlačenjem svrdla povećava otpornost trošenju. Najčešće prevlake koje se koriste kod prevlačenja svrdla su PACVD TiN i PVD TiN. U teorijskom dijelu ovog rada opisani su brzorezni čelici od kojih izrađuju svrdla, njihova mikrostruktura, toplinska obrada te postupci prevlačenja iz parne faze. Opisana je geometrija oštrice spiralnog svrdla i sile rezanja kod bušenja te procesi trošenja svrdla. U eksperimentalnom dijelu provedeno je prevlačenje svrdla od brzoreznog čelika prevlakom PACVD TiN. Na prevučenim svrdlima ispitana je mikrostruktura, tvrdoća, debljina i prionjivost prevlake. Provedeno je niz bušenja u aluminijevom disku s neprevučenim svrdlom, svrdlom s prevlakom PACVD TiN i komercijalno dobavljivim svrdlom s prevlakom PVD TiN. Tijekom bušenja u ukupnom trajanju od 120 s, svjetlosnom mikroskopijom dokumentirano je trošenje svrdla svakih 30 s. Termografskom kamerom je mjerena temperatura oštrice svrdla i aluminijskog diska. Obje vrste prevučenih svrdla pokazala su manje trošenje oštrice od neprevučenih svrdla. Svrdlo s PACVD TiN prevlakom više se ugrijavalo pri bušenju u odnosu na neprevučeno i svrdlo s PVD TiN prevlakom.
Abstract (english)
When testing the wear of drill bits, there is a number of wear models that are mainly used in the processing of metal materials. During operation, the drill bits are exposed to high mechanical and thermal stresses, and by coating the drill bit, the resistance to wear increases. The most common coatings used when coating drills are PACVD TiN and PVD TiN. In the theoretical part of this paper, the high-speed steel which the drills are made of, their microstructure, heat treatment and vapor phase coating procedures are described. The geometry of the spiral drill blade and the cutting force during drilling are described, as well as the wear processes of the drill bit. In the experimental part, high-speed steel drills were coated with PACVD TiN coating. The microstructure, hardness, thickness and adhesion of the coating were tested on the coated drill bits. A series of drills were performed on an aluminum disc with an uncoated drill bit, a PACVD TiN coated drill bit, and a commercially available PVD TiN coated drill bit. During drilling for a total duration of 120 s, the wear of the drill bit was documented with light microscopy every 30 s. The temperature of the drill blade and the aluminum disc was measured with a thermographic camera. Both types of coated drills showed less blade wear than uncoated drills. The drill bit with PACVD TiN coating heated up more when drilling compared to the uncoated drill bit and drill bit with PVD TiN coating.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:328215
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2023-03-01 15:11:48