海水に對して耐蝕性なる新輕合金クルミン (Chlumin) と既知輕合金との比較(第二報)

概要

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Further data were given on "Chlumin" in this paper. The content is briefly summarized as follows : 1. The effect of Fe, Cr, Mg on cast Aluminium was investigated respecting microscopic structure, corrosion, strength, elongation and fracture and it became clear that why "Chlumin" containing these elements has so excellent properties. 2. "Chlumin" was compared with various known light alloys in chill cast state. It has the largest impact resistance, 3 times as large as Silumin and from several to 10 times as large as Duralumin and Y-alloy. It is equal in hardness to Silumin. In high temperature strength it is a little inferior to Y-alloy but is stronger than any others and it has the largest elongation amounting to more than 20% at all temperatures, so it can be rolled or forged very easily at any temperature. In bending strength and angle it surpasses considerably any other ones such as Y-alloy. Silumin etc. It has the finest fracture like Aluminium. 3. Wires were immersed in various ways in salt and sea water and the decrease of strength and elongation due to corrosion were observed during one year. Duralumin corroded very much loosing both properties rapidly, while "Chlumin" and Aluminium remained very good. 4. Various articles have been cast commercially and used in success for several years Plates in commercial size were manufactured and are now used in practice.
社団法人日本鉄鋼協会の論文
1931-12-25