焼付き防止を考慮した純チタン板の深絞り加工性

抄録

In press forming, pure titanium sheet has sufficient ductility. However, the seizure tends to occur during the deep drawing due to high reactivity with die materials. In the current study, by using the resin composite die, the titanium cups were formed by deep drawing for preventing seizing. In the experiment, the material was pure titanium sheet TP340. The initial thickness of the sheet was 0.5 mm in thickness. The sheets were employed and a flat sheet blank is formed into a cylindrical by a punch. The effect of the die shape on the deep drawability was examined. The cups were successfully drawn by the resin composite die. Even if the number of drawn cups increased, the thickness strain hardly changed. The seizure did not cause in the case of 100 times of processing number of times. It was found that the resin composite die has sufficient ability in preventing the seizure in deep drawing processes.