MICROSTRUCTURES AND MECHANICAL PROPERTIES OF CP TITANIUM AND Ti-6A1-4V ALLOY CASTINGS CAST BY METAL MOLD IN VACCUM ARC REMELTING PROCESS

摘要

Recently, advanced application of titanium alloy to the biomaterials industry has been realized. To produce higher quality of titanium casting at a lower cost, the new titanium casting technology by using a permanent metal mold was developed and applied to hip joint for biomedical application. The present study was carried out to investigate the reactivity of the Commercially Pure(CP) titanium and the Ti-6Al-4V alloy with metal mold by applying various ceramic powders coating on the mold surface. The hip joint with CP titanium for biomedical application was cast by steel mold. It was found that reaction layer was not formed on the surface of specimens cast by steel mold coated by Y_2O_3 powder.