다이캐스팅용 Al-Zn-Mg-Fe 합금의 특성에 미치는 Zn 및 Mg 첨가의 영향

• Published in: 한국주조공학회지 Vol. 33; no. 4; pp. 171 - 180
• Main Authors: 김기태, Ki Tae Kim, 임영석, Young Suk Kim, 신제식, Je Sik Shin, 고세현, Se Hyun Ko, 김정민, Jeong Min Kim
• Format: Journal Article
• Language: Korean
• Published: 한국주조공학회 30.08.2013
• Subjects: Aluminum alloy; Die casting; Tensile stregth; Thermal conductivity; 금속공학; Thermal conductivity; Die casting; Tensile strength; Aluminum alloy
• ISSN: 1598-706X; 2288-8381
• DOI: 10.7777/jkfs.2013.33.4.171

The effects of alloying elements on the solidification characteristics, microstructure, thermal conductivity, and tensile strength of Al-Zn-Mg-Fe alloys were investigated for the development of high strength and high thermal conductivity aluminum alloy for die casting. The amounts of Zn and Mg in Al-Zn-Mg-Fe alloys had little effect on the liquidus / solidus temperature, the latent heat for solidification, the energy release for solidification and the fluidity of Al-Zn-Mg-Fe alloys. Thermo-physical modeling of Al-Zn-Mg-Fe alloys by the JMatPro orogram showed MgZn2, AICuMgZn and Al3Fe phases in the microstructure of the alloys. Increased amounts of Mg in Al-Zn-Mg-Fe alloys resulted in phase transformation, such as MgZn2⇒MgZn2+ AICuMgZn⇒AICuMgZn in the microstructure of the alloys. Increased amounts of Zn and Mg in Al-Zn-Mg-Fe alloys resulted in a gradual reduction of the ther-mal conductivity of the alloys. Increased amounts of Zn and Mg in Al-Zn-Mg-Fe alloys had little effect on the tensile strength of the alloys.