Abstract
A new casting machine for NiTi alloys was developed, and mechanical properties and fitness of casted NiTi alloys were studied. Good mechanical properties and finess were obtained by using graphite coating on phosphate bonded investment.
The castings of pure titanium, Ni-Cr and Co-Cr alloy were also examined by using this casting machine. Reaction between metals and phosphate bonded investments was markedly decreased by heated mold in vacuum, and the elongation of casted titanium and Co-Cr alloy were greatly increased.
The casting machine developed in this study may be very useful not only for casting of NiTi alloys but also for those of titanium and other base metal alloys.
