| 摘要 |
PURPOSE:To manufacture a mold having no trouble between the mold and a product obtained in the mold by executing superplastic forming to a titanium alloy plate having the same composition as that of titanium alloy powder. CONSTITUTION:Two titanium alloy plates 1 having the same composition as that of titanium alloy powder which is subjected to hot hydrostatic pressure are joined together, its circumference is rail-sealed by welding, and a gas feeding pipe 3 is welded and coupled to a part thereof. It is positioned between upper and lower dies 4, 5 bored into a desired mold shape, and subsequently, is heated to a forming temperature, also a pressure is applied between the two tatanium alloy plates 1 by an inert gas fed from the pipe 3, and a hot hydrostatic pressure mold of titanium alloy powder is manufactured by superplastic forming. |
