Changes in structure and properties of copper wire during the production and processing

Scientific paper - Original scientific paper

• Author: Ivan Jandrlić
• Author: Franjo Kozina
• Author: Tin Brlić
• Author: Lorena Mrkobrada
• Editor: Mrjam Jan-Blažič
• Author's institution: University of Zagreb; Faculty of Metallurgy; (Department of Mechanical Metallurgy); (Laboratory of Deformation Metal Processing)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract (english)

Irreplaceability of copper, as an electrical conductor, makes it the most important non-ferrous metal in application. The most frequently used methods of producing the copper conductors involves continuous casting of the copper wire, subsequent cold drawing deformation and heat treatment processes to improve copper mechanical and electrical properties. In this paper the research was performed on copper wire produced by continuous casting. During production various structural changes and changes in mechanical properties occur. To investigate those changes and to clarify their influence on final product, structure and hardness were recorded and measured in all stages of production. While macrostructure and microstructure were observed by light microscopy, the hardness was measured using Vickers hardness testing method. The results indicate that the initial coarse-grained structure in as-cast condition, brakes down into a fine- grained structure during reduction. Those fine grains are orientated in the direction of cold drawing during plastic deformation. There is an increase in the hardness. The purpose of heat treatment is to achieve better conductivity while maintaining good mechanical properties. The results of microstructure analysis indicate the presence of twin crystals in the structure of the final product

• Keywords (english): copper wire; cold drawing; twin crystals; structure; hardness
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Publication title: Abstract Proceedings 62nd IFC Portorož 2022
• Numbering: 41
• ISBN: 978-961-94793-5-3
• URN:NBN: urn:nbn:hr:115:521645
• Publication: 2022-09
• Project: Number: KK.01.1.1.02.0020; Title (croatian): Centar za ljevarstvo - SIMET; Title (english): Center for casting - SIMET; Acronym: SIMET; Leader: Zdenka Zovko Brodarac; Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Project: Number: KK.01.1.1.02.0022; Title (croatian): Virtulab – Integrirani laboratorij za primarne i sekundarne sirovine; Acronym: Virtulab; Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Conference: Title: 62nd IFC PORTOROZ 2023; Location: Portorož, Slovenia; Organizer: Slovenian foundrymen society; Start date: 2022-09-14; End date: 2022-09-16; Assembly type: Lecture
• Type of resource: Text
• Publisher: Tisk Fleks d.o.o.
• Publishing place: Ljubljana
• Access conditions: Open access
• Created on: 2024-04-24 12:01:45