| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an α+β type titanium alloy plate which is highly strong and is also excellent in strength anisotropy. <P>SOLUTION: The high strength α+β type titanium alloy plate contains 2.0-4.5 mass% of at least one of all proportional solid solution type β stabilizing elements by Mo equivalent, 0.3-2.0 mass% of at least one of eutectoid type β stabilizing elements by Fe equivalent, and over 3 mass% and not more than 5.5 mass% of at least one of α stabilizing elements by Al equivalent, and further contains 0.1-1.5 mass% of Si, 0.01-0.15 mass% of C, and the balance being Ti and inevitable impurities. The average value of an inclination angle formed by a normal of (0001) surface of an α phase and a normal of a rolling surface is equal to or smaller than 60°, and the area ratio of the α phase for which the inclination angle is equal to or larger than 70° to the entire α phase is equal to or lower than 40%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
