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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (41권6호 528-534)

Effect of Additional Cu and Natural Aging Treatment on Thermal Diffusivity in the Al-Mg-Si Alloy

Al-Mg-Si 합금에서 Cu 첨가와 자연시효 열처리가 열확산도에 미치는 영향

Yu-Mi Kim and Se-Weon Choi†

Korea Institute of Industrial Technology

DOI : http://dx.doi.org/10.7777/jkfs.2021.41.6.528

Abstract

To confirm effects of natural and artificial aging of precipitate on thermal diffusivity and hardness, the studied Al-Mg-Si alloy were manufactured by gravity casting method with 0.6wt% and 1.0wt% additional Cu element. The samples were used for measuring thermal diffusivity and hardness. The addition of Cu, promoted by intermediates such as Q″ and θ″ phases, contributing to the improvement of hardness and high-temperature thermal diffusivity. The natural aging decreased the hardness of the Al-Mg-Si-Cu alloys with increasing time, but did not affect the thermal diffusivity.

Keywords

Al-Mg-Si, Cu, Thermal diffusivity, Natural aging treatment and T6 heat treatment