鑄造用亞鉛合金に関する研究(第5報) : Zn-Al系合金に及ぼす第三元素の影響

概要

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The authors investigated oh additional elements which prevent the intercrystalline corrosion in zinc-aluminium alloys used for die casting. Additional elements are calcium, chromium, copper, lithium, magnesium, manganese, nickel and silicon. By using these alloys, the authors, also, measured the monotectoid transformation by means of the dimentional change method and investigated on a relation between the intercrystalline corrosion and the monotectoid transformation. The results obtained are as follows : (1) magnesium is most effective for preventing the intercrystalline corrosion, and also copper, calcium and nickel are effective, but lithium is less ; (2) magnesium, lithium and copper are effective for retarding the monotectoid transformation in the aging at room temperature and 95℃; (3) there is no direct relation between the monotectoid transformation and the intercrystalline corrosion, so that it may be necessary for us to study the change of micro-structure in these alloys. (Received September. 12, 1951)
宇宙航空研究開発機構の論文
1951-12-30