다이캐스팅용 고열전도도 Al-Zn-Mg-Fe 합금의 특성에 미치는 Zn 및 Mg 첨가량의 영향

• Published in: 한국주조공학회지 Vol. 33; no. 3; pp. 113 - 121
• Main Authors: 김기태, Ki Tae Kim, 임영석, Young Suk Lim, 신제식, Je Sik Shin, 고세현, Se Hyun Ko, 김정민, Jeong Min Kim
• Format: Journal Article
• Language: Korean
• Published: 한국주조공학회 30.06.2013
• Subjects: Aluminum alloy; Die casting; Tensile strength; Thermal conductivity; 금속공학; Thermal conductivity; Die casting; Tensile strength; Aluminum alloy
• ISSN: 1598-706X; 2288-8381
• DOI: 10.7777/jkfs.2013.33.3.113

The effects of Zn and Mg amounts on the solidification characteristics, microstructure, thermal conductivity and tensile strength of Al-Zn-Mg-Fe alloys were investigated for the development of high thermal conductivity aluminium alloys for die casting. Zn and Mg amounts in Al-Zn-Mg-Fe alloys had a little effect on the liquidus / solidus temperature, the latent heat for solidification and the fluidity of Al-Zn-Mg-Fe alloys. Thermo-physical modelling of Al-Zn-Mg-Fe alloys by JMatPro program showed MgZn2, AlCuMgZn and Al3Fe phases on microstructure of their alloys. Increase of Zn and Mg amounts in Al-Zn-Mg-Fe alloys resulted in gradual reduction of the thermal conductivity of their alloys. Increase of Mg amounts in Al-2%Zn-Mg-Fe alloys had little effect on the tensile strength of their alloys, but increase of Mg amounts in Al-4%Zn-Mg-Fe alloys resulted in steep increase of the tensile strength of their alloys.