Abstract
Cooling the melt of 90% bismuth alloy at the cooling velocity of 3.5°C/min from 300° to the measuring temperature, the relation between the draining time and holding duration at the temperature was investigated. It is recognized that the almost all of the primary crystallization occurs after ca. 10 minutes holding, followed by the growth of the crystals and reaches its equilibrium state after 30 minutes holding.
The influence of cooling velocity was also investigated. The cooling procedure at the cooling velocity less than 0.5°C/min seems to crystallize the amount of primary crystals in equilibrium state.
