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undergraduate thesis
Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:958693
Brkić, Robert
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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

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Brkić, R. (2020). Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:958693

Brkić, Robert. "Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:958693

Brkić, Robert. "Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:958693

Brkić, R. (2020). 'Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 June 2024, https://urn.nsk.hr/urn:nbn:hr:235:958693

Brkić R. Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2024 June 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:958693

R. Brkić, "Utjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:958693

Metadata
TitleUtjecaj veličine abrazivnog zrna na abrazijsku otpornost nehrđajućih čeličnih ljevova
Title (english)Effect of abrasive grain size on the abrasive wear resistance of cast stainless steels
AuthorRobert Brkić
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-02-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Osnovni cilj završnog rada bio je ispitati abrazijsku otpornost austenitnog nehrđajućeg čeličnog lijeva oznake GX5CrNi 19-10 i dupleks nehrđajućeg čeličnog lijeva oznake GX2CrNiMoN 25-6-3 te utvrditi postoji li kritična veličina abrazivnog zrna. Također je analizirana mikrostruktura i izmjerena mikrotvrdoća HV0,2. U teorijskom dijelu rada opisani su uvjeti korozijske postojanosti čeličnih ljevova, podjela po vrstama, mikrostruktura i svojstva. Opisan je abrazijski mehanizam trošenja i objašnjen fenomen kritične veličine abrazivnog zrna. Utvrđeno je da intenzitet trošenja kod oba lijeva ovisi o veličini abrazivnog zrna. Dupleks čelični lijev ima višu mikrotvrdoću i veću otpornost na abrazijsko trošenje od austenitnog čeličnog lijeva. Kod oba lijeva rubovi su tvrđi i manje se troše u odnosu na sredinu odljevka. Ove razlike su posljedica grublje mikrostrukture na rubu odljevaka. Kod svih ispitanih uzoraka izražen je fenomen kritične veličine abrazivnog zrna. Kritični promjer abrazivnog zrna iznosi oko 52 µm.
Abstract (english)
The objective of this paper was to investigate abrasive wear of austenitic cast stainless steel grade GX5CrNi 19-10 and duplex cast stainless steel grade GX2CrNiMoN 25-6-3 and to determine critical particle size. Microstructure and microhardness of these materials was analysed as well. The conditions in which cast steels are corrosion resistant were described in theoretical part. Classification of cast stainless steels, their microstructure and properties, wear mechanisms and critical abrasive particle size were also explained in theoretical part of this paper. It is determined that wear rate of both casts depends on abrasive particle size. Duplex cast steel exhibits higher microhardness and therefore higher resistance to abrasive wear than austenitic cast steel. In both casts the corners of cast steels are harder which is due to smaller grain size. Critical particle size phenomenon is present in every sample and its value is around 52 µm.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:958693
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
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Created on2020-02-24 10:27:43