| 摘要 |
PURPOSE:To manufacture a titanium alloy which has a satisfactory texture and is excellent in mechanical property, by hot-rolling a rolling material obtained from an (alpha)+(beta) type titanium alloy ingot, in an (alpha)+(beta) area, giving it sufficient internal distortion, and after that, executing are equi-axes crystal forming treatment. CONSTITUTION:A rolling material is obtained by cogging an ingot of an (alpha)+ (beta) type titanum alloy such as Ti-6Al-4V, etc. Subsequently, this material is hot-rolled by giving >=50% draft in an (alpha)+(beta) area, and accumulation of internal distortion is increased, so that recrystallization in the following equi-axed crystal forming treatment is simplified. Subsequently, the obtained hot rolling material is hot-rolled, and after that, immediately, it is slowly cooled to about 700 deg.C at a speed of about 150 deg.C/hr by means of furnace cooling and is subjected to the equi-axed crystal forming treatment, and after that, is is cooled in the atmosphere to room temperature, by which it is possible to obtain a rolling material of an (alpha)+(beta) type titanium alloy, which has a satisfactory crystal structure being uniform and fine, and is excellent in mechanical property. |
