抄録
After this war the use of zinc was extremely necessary in our die casting industry,for Al was exhaused. Generally speaking, the zamak alloy was used as zinc die casting alloy,but zinc, defined as Pb<0.003 in the zamak alloy,could not be produced economically and abundantly in Japan.
The increase of Pb content brought about the blittleness on account of the ageing phenomenon, so magnesium was efficient as a protection against the ageing. In the 1948 spring meeting of the Imono Kyokai the authors reported on the relation between Mg and Pb of zamak alloys, made by Japanese zinc.
In this report the authors researched on the effect of Ni and Mn on the zinc alloys.
