| 摘要 |
PURPOSE:To inexpensively and safely produce a titanium material by subjecting a square section billet of titanium or titanium alloy to press roll piercing at a specific temp. and elongation ratio. CONSTITUTION:The square section billet of the titanium or the titanium alloy is subjected to the press roll piercing, by which the titanium seamless pipe is produced. The billet is pierced within the 1.05 to 1.35 range of the elongation ratio lambda in a 700 to 1100 deg.C temp. range in this case. The industrial effect in the production of the titanium material is enhanced in this way. |
