機能性チタンクラッド容器の深絞り加工性

抄録

Aiming to enhance corrosion resistance of steel cup, the formability of pure titanium clad sheet by multistage deep drawing was investigated. The blank was constituted by interposing steel between two sheets of pure titanium sheets. In the experiment, the materials were pure titanium sheets TP270, ultralow-carbon steel SPCC, and stainless steel SUS316L. A total plate thickness of the blank was 1.0 mm. In the deep drawing process, the blank was employed and a flat sheet blank was formed into a circle by a punch. For the prevention, pure titanium blank was treated by oxide coating. By this method, titanium blank is not in direct contact with the die during the forming due to the existence of the oxide layer. By oxide coating, the titanium sheet has sufficient ability in preventing the seizure in multistage deep drawing. It was found that the titanium clad cups were successfully drawn.