Effects of Allying Elements on Liquidus and Solidus Lines Lines of Copper-Base Binary Phase Diagrams

摘要

Various copper alloys applied to electric and electronic use undergo the casting process as the first step of production. But a fully systematic investigation of their castability has not yet been attempted. In this work, liquidus gradients and solidification temperature ranges were acquired from phase diagrams of binary copper alloys and were arranged on the periodic table. As a result, it became clear that the liquidus gradients of the same group on the periodic table are almost constant, and elements that enlarge the solidification temperature range exist in the continuous areas around 2A and 6B groups on the periodic table. This result shows that these characteristics above mentioned seem to stem from the nature of the added elements and it is considered that they are also practically useful for estimating the castability of new alloys.