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


(논문)연구논문

한국주조공학회지 (26권6호 249-257)

Effects of Alloying Element and Heat-Treatment Condition on the Strength of Squeeze-Casted Al-3.0 wt%Si Alloy

용탕 단조 Al-3.0 wt%Si 합금의 강도에 미치는 합금 원소 및 열처리 조건의 영향

Hagju Lee, Jae-Hyoung Hwang*, Hae-Wook K w o n **

Tongmyoung University, *Daehan Special Metal Co., **Yeungnam University

Abstract

The effects of alloying element and the condition of heat-treatment on the strength of squeeze-cast Al-3.0 wt%Si alloy were investigated. The strength of the alloy without grain refinement was increased with increase Cu content upto 3.0 wt% and rather decreased beyond that. The tensile strength of the alloy with grain refinement increased with Cu content upto 3.0 wt% and not changed beyond that. The strength of the alloy without grain refinement increased with the Mg content. The tensile strength with grain refinement increased with the Mg content upto 0.50 wt% and then decreased beyond that. The strength of the grain refined alloy increased by individual and simultaneous additions of Cu and Mg and the maximum strength was obtained with Al-3.0 wt%Si-4.5 wt%Cu-0.50 wt%Mg alloy. The optimum heat-treatment condition for this alloy was obtained.

Keywords

Squeeze casting, Strength, Mechanical property, Al-casting alloy, Al-Si alloy.