Rekristalizacijsko žarenje aluminijevih legura serije EN-AW 50XX

undergraduate thesis

• Title (english): Recrystallization annealing of aluminium alloys of the EN-AW 50XX series
• Author: Lovre Alviž
• Mentor: Darko Landek (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U radu je opisana prerada valjanjem u hladnom stanju i rekristalizacijsko žarenje aluminij - magnezijeve legure 5005. U postupku obrade hladnim valjanjem kod ove legure dolazi do izduženja kristalnih zrna u smjeru valjanja što ima utjecaj na povećanja čvrstoće i tvrdoće. U promatranom tehnološkom procesu obrade valjanjem ova pojava otežava nastavak hladnog oblikovanja i smanjuje obradljivost rezanjem. Za oporavak strukture i postizanje povoljnih mehaničkih i tehnoloških svojstava primjenjuje se toplinska obrada rekristalizacijsko žarenje u dvije faze na temperaturama 320 °C i 420 °C u trajanju od 4 sata. U eksperimentalnom dijelu rada provedeno je ispitivanje tvrdoće, statičko vlačno ispitivanje i analiza mikrostrukture legure 5005 prije i nakon rekristalizacijskog žarenja. Rezultati ispitivanja nakon primjene rekristalizacijskog žarenja pokazuju smanjenje tvrdoće sa 54,72 HB na 32,48 HB i smanjenje vlačne čvrstoće s 183 N/mm2 na 113 N/mm2, uz povećanje rezljivosti i oblikovljivosti.

Abstract (english)

The paper describes cold rolling processing and recrystallization annealing of aluminum-magnesium alloy 5005. In the cold rolling process of this alloy, crystal grains are elongated in the direction of rolling, which has an effect on increasing strength and hardness. In the observed technological process of rolling processing, this phenomenon makes it difficult to continue cold forming and reduces workability by cutting. To recover the structure and achieve favorable mechanical and technological properties, heat treatment recrystallization annealing is applied in two phases at temperatures of 320 °C and 420 °C for 4 hours. In the experimental part of the work, hardness testing, static tensile testing and microstructure analysis of alloy 5005 before and after recrystallization annealing were performed. Test results after the application of recrystallization annealing show a decrease in hardness from 54.72 HB to 32.48 HB and a decrease in tensile strength from 183 N/mm2 to 113 N/mm2, with an increase in cutability and formability.

• Keywords: aluminij; valjanje; rekristalizacija; tvrdoća; čvrstoća; žarenje; zrna
• Keywords (english): aluminum; rolling; recrystallization; hardness; strength; annealing; grains
• Language: croatian
• URN:NBN: urn:nbn:hr:235:239859
• 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: 2024-02-27 10:32:19