耐熱性アルミニウム輕合金の研究(I)

抄録

In the first part of the research of heat-resisting Al-alloys, which was carried on to investigatg the Y-anoy series, the author could not find any excellent alloy comparihg with the socalled Y-alloy which is wellknown in England. Hence, he undertook the systematic studies of heatresisting Al-alloys. The specimens were all chillcast and the experiments were made at the temperatures from the room temperature to 500°C, on pure aluminium, binary, ternary, quaternary alloys and so on, addiug the following elements, Cu, Zn, Ni, Cr, Mn, Fe, Si and Mg, and the results were discussed. On the othe hand, the alloys containing Cu 4%, Si 1%, Mg 1% and Cu 4%, Si 10%, Mg 1% showed the excellent mechanical properties after heat-treatment. Therefore, he investigated the effects of Ni, Cr, Mn and Fe upon the improvement of mechanical properties of these alloys. Moreover, extraordinary implovement was obtained by adding Ti as TiCl₄ into thbse alloys: for example, a certain specimen showed a very high tensile strength, 46kg/mmmm² at ordinary temperature and 30kg/mmmm² at 300°C. The reasons for gaining such high tensile cast Al-alloys were explained in detail on his theoretieal consideration.