magistrsko delo
Noel Gregori (Author), David Bombač (Mentor), Boštjan Bradaškja (Co-mentor)

Abstract

Magistrsko delo ''Simulacija vročega valjanja debele pločevine nerjavnega jekla AISI 321H, 316L in 304L'' je bila izvedena z namenom določitve preoblikovalnosti omenjenih jekel za umerjanje programske opreme za modeliranje mikrostrukture RSProSim in industrijske validacije rezultatov, pridobljenih z RSProSim. Preoblikovalnost se je določalo s tlačnimi preizkusi na simulatorju termomehanskih metalurških stanj Gleeble 1500D in preizkusi rasti zrn na Gleeble 1500D in v komorni peči Bosio EUP-100/1250C. Industrijsko validacijo se je opravilo z analizo zrn vroče valjanih plošč iz podjetja SIJ Acroni d.o.o. Nerjavna jekla AISI 321H, 316L in 304L so avstenitna nerjavna jekla. Tlačni preizkusi so bili izvedeni pri temperaturah 1250, 1200, 1150, 1100, 1050, 1000 in 950 °C ter pri hitrosti deformacije 10, 1 in 0,1 s-1. Preizkuse rasti zrn se je izvedlo za vsa jekla pri temperaturi 1150 °C, preizkusi pa so trajali do 600 s. Temperature žarjenja v komorni peči so bile 1120 °C za jeklo AISI 321H, 1070 °C za AISI 316L in 1050 °C za AISI 304L. Program RSProSim opisuje razvoj mikrostrukture med procesom vročega valjanja. Industrijsko validacijo se je opravilo s primerjavo porazdelitve velikosti kristalnih zrn med vroče valjano ploščo in izračunanimi rezultati iz RSProSim. Simulacija se je izvedla pri enakih parametrih, pri katerih je potekalo valjanje.

Keywords

avstenitno nerjavno jeklo;vroče valjanje;rekristalizacija;modeliranje mikrostrukture;izločevalno utrjevanje;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL NTF - Faculty of Natural Sciences and Engineering
Publisher: [N. Gregori]
UDC: 669
COBISS: 131801347 Link will open in a new window
Views: 94
Downloads: 26
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Other data

Secondary language: English
Secondary title: hot rolling simulation of AISI 321H, 316L and 304L stainless steel quarto plates
Secondary abstract: The master thesis ''Simulation of hot rolling of AISI 321H, 316L and 304L quarto stainless steel plates'' was carried out to determine the formability of the steels in question for the calibration of the microstructure modelling software RSProSim and for the industrial validation of the results obtained with RSProSim. The formability was determined by pressure tests on the Gleeble 1500D thermomechanical metallurgical simulator. In addition, grain growth tests were performed on the Gleeble 1500D and in the Bosio EUP-100/1250C chamber furnace. The industrial validation was performed by grain analysis of hot rolled slabs from SIJ Acroni Ltd. The stainless steels AISI 321H, 316L and 304L are austenitic stainless steels. The pressure tests were carried out at temperatures of 1250, 1200, 1150, 1100, 1050, 1000 and 950 °C and strain rates of 10, 1 and 0.1 s-1. Grain growth tests were carried out for all steels at 1150 °C for up to 600 s. The annealing temperatures in the chamber furnace were 1120 °C for AISI 321H, 1070 °C for AISI 316L and 1050 °C for AISI 304L. RSProSim describes the evolution of the microstructure during the hot rolling process. Industrial validation was performed by comparing the crystal grain size distribution during hot rolling of the plate with the calculated results from RSProSim. The simulation was carried out at the same parameters at which the rolling was carried out.
Secondary keywords: austenite stainless steel;hot rolling;recrystallization;microstructure modeling;precipitation hardening;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za materiale in metalurgijo
Pages: XVIII, 64 str.
ID: 16411107