Research on Titanium Flow by"Tracer Element Molten Method"in the Dental Precision Casting : 2.Relationship between the Titanium Flow in Plate Molds and the Casting Defects

Abstract

The relationship between the titanium flow in plate molds visualized by the tracer element molten method and the casting defects has been investigated.In the case of Cyclarc, laminar flow, which tends to cause the large internal defect at the cener of the vortex, was observed.The solidification shell of the pattern was usually made at an early stage.In the case of Titaniumer, a turbulent flow was observed, and the intense centrifugal force affected the filling process in the mold and the distribution of small porosities.In the thinner molds, the obstruction of subsequent flows by the initial soldification layers provides a new type of filing for the mold.