Abstract
The basic experiments on segregation have been conducted in order to substantiate the theoretical mechanism of the shape of segregation curves.
Succeeding to the previous report, almost similar experiment was conducted this time; i. e., by controlling the solidification process of the samples completely and four kinds of samples solidified at the different travelling rates of solidification were prepared, and segregation in these samples were determined.
The experiments were carried on three cases; i. e., (1) the full length of samples was varied, (2) the cross sectional area of sample was diminished gradually along the direction of solidification, (3) the travelling rate of solidification of sample was increased during solidification.
The gists of the results are as follows:
(1) When the size of castings reduced, the fiat portion of the segregation curve corresponding to the intermediate layer of castings reduced, and when the size was reduced moreover, the degree of segregation decreased.
(2) Regarding to the shape of castings, it was clarified that the segregation in cylindrical castings became to a high degree than the segregation in fiat castings.
(3) When the travelling rate of solidification increased during solidification, the degree of normal segregation in castings became markedly.
