Ispitivanje fizikalnih i kemijskih svojstva ulja za kaljenje

undergraduate thesis

• Title (english): Examination of physical and chemical properties of hardening oil
• Author: Andrija Marinčić
• Mentor: Božidar Matijević (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-03-02, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

Postupak kaljenja je postupak toplinske obrade koji se provodi u svrhu povećanja mehaničkih svojstava materijala. Prilikom postupka kaljenja, da bi se dobila određena željena svojstva materijala, u većini slučajeva kod legiranih čelika nije povoljno gašenje u vodi, jer u predmetu nastaju neželjena naprezanja i pukotine. Stoga se takvi čelici gase u ulju za kaljenje, te tako sporijim hlađenjem, dobivaju odgovarajuća svojstva. Općenito, svojstva materijala nakon gašenja, osim što ovise o svojstvima materijala koji se toplinski obrađuje, ovise i o svojstvima medija u kojem se materijal gasi. Poznavanjem fizikalnih i kemijskih svojstava ulja za kaljenje možemo preciznije kontrolirati proces gašenja. U ovom radu obradit će se fizikalna i kemijska svojstva ulja u postupku kaljenja na uzorcima koji će predstavljati grupu biljnih ulja. Također, u radu će se fizikalna i kemijska svojstva usporediti s rezultatima konvencionalnog ulja za kaljenje.

Abstract (english)

The hardening process is a heat treatment process that is carried out in order to increase the mechanical properties of the material. During the hardening process, in order to obtain certain desired properties of the material, quenching in water is not sufficient in most cases with alloy steel, because unwanted stresses and cracks occur in the object. Therefore, such steels are quenched in quenching oil, and with this slower cooling, they acquire the appropriate properties. In general, the properties of the material after quenching, in addition to depending on the properties of the heat-treated material, also depend on the properties of the medium in which the material is quenched. By knowing the physical and chemical properties of the quenching oil, we can more precisely control the quenching process. In this paper, the physical and chemical properties of oil in the hardening process will be processed, and this will be done on samples of vegetable oils. Also, the paper will compare the physical and chemical properties with the results of conventional quenching oil.

• Keywords: kaljenje; gašenje; fizikalna i kemijska svojstva ulja; ulja za kaljenje
• Keywords (english): Hardening; Quenching; Physical and Chemical Properties of Oil; Quenching Oil
• Language: croatian
• URN:NBN: urn:nbn:hr:235:843634
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-03-02 10:57:45