Kriogeno preoblikovanje avstenitnih jekel

Vilhar, Vid (author), Pepelnjak, Tomaž (mentor)

Preoblikovanje je pretvarjanje ene oblike trdne snovi v drugo s plastično deformacijo, pri čemer masa izdelka ostaja nespremenjena. Hkrati s plastično deformacijo v materialu poteka proces utrjevanja in lokalna preobrazba mikrostrukture, kar posledično spreminja lastnosti končnega produkta. Namen dela je raziskati teoretično ozadje fazne premene iz avstenita v martenzit v avstenitnih nerjavnih jeklih. Poseben poudarek bo veljal dogajanju med plastično deformacijo v kriogenem temperaturnem območju ter spremembam magnetnih lastnosti materiala. Obravnavani bodo tudi postopki merjenja vsebnosti magnetne faze v jeklu ter načini zagotavljanja ter merjenja konstantne temperature podhladitve med preoblikovanjem.

• Language: Slovenian
• Keywords: avstenitna jekla, martenzitna transformacija, plastična deformacija, kriogene temperature, dislokacije, preoblikovanje
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [V. Vilhar]
• Year: 2021
• Number of pages: XIV, 29 str.
• PID: 20.500.12556/RUL-130454
• UDC: 669.14.018.8:621.785(043.2)
• COBISS.SI-ID: 80325891
• Publication date in RUL: 15.09.2021

VILHAR, Vid, 2021, Kriogeno preoblikovanje avstenitnih jekel [online]. Bachelor’s thesis. Ljubljana : V. Vilhar. [Accessed 3 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=130454

Secondary language

• Language: English
• Title: Forming of austenitic-steels at cryogenic conditions

Abstract

Forming is a process of changing the form of solid body using plastic deformation, while it's mass stays constant. During plastic deformation, also a process of hardening and microstructure transformations are going on in the material. Consequently, mechanical properties of the product change. The purpose of the study is to explain the theoretical background of the phase transformation from austenite to martensite in austenitic stainless steels. Special emphasis is on transformations in the material during plastic deformation at cryogenic conditions and changes of the ferromagnetic properties. Procedures of the magnetic phase content measuring and different ways of cooling and measurin of temperature are taken into account.

• Keywords: austenitic steels, martensite transformation, plastic deformation, cryogenic temperatures, dislocations, forming