熔融状態に於ける鑄造用輕合金銅合金及び鑄鐵の粘性に就て

概要

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To measure the viscosity of molten metals and alloys the authors used the rotating cylinder method. To prevent the oxidasion of the molten metals, their surfaces were covered by carbon powder or nitrogen gas current ; and just before each measurement the oxide filme on the surface was scraped off Thus we could easily measure the viscosity of the molten metals. The kinds of metals and alloys whose viscosity was measured are as follows : 1. Light alloys : - Al. Al-Cu, Al-Zn, Al-Cu-Zn, Al-Si, Al-Cu-Ni, Al-Cu-Ni-Mg, Silumin 2. Copper alloys : - Al-branze, bronze, brass, gun-metal, Mn-bornze 3. Cast Irons. During the measurement of viscosity of aluminium and its alloys, the authors found two change points at 765℃ ; and 855℃ ; and their existence was further ascertained by thermal analysis and electric resistance measurement. The modification of Silumin seems to have some connection with the change at 765℃. phosphorus, carbon, silicon and manganese improve the viscosity of cast iron in different degrees but sulpher injures it remarkably.
社団法人日本鉄鋼協会の論文
1931-05-25