冷間深絞り加工による高耐食性チタンクラッド板の成形性

抄録

Cladding is the bonding together of dissimilar metals. One of clad products is the titanium clad steel sheet. It is effective to cover with pure titanium sheet to improve the corrosion resistance of the steel sheet. Titanium clad steel sheets are often achieved by rolling sheets together under high pressure. In the current study, the formability of pure titanium clad sheet by multistage deep drawing was investigated to enhance corrosion resistance of steel cup. In the experiment, the materials were pure titanium sheets TP270, ultralow-carbon steel SPCC, and stainless steel SUS316L. The initial thickness of the sheet was 0.2 to 0.5 mm in thickness. 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. Various cups were drawn by exchanging the punch and die. The die was a conical shape without a blankholder in the subsequent stages. For the prevention, pure titanium blank was treated by oxide coating. 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.