manufacturing method of bending workability and bending high strength α + β type titanium alloy plate was excellent anisotropy and high strength α + β type titanium alloy plate

摘要

PROBLEM TO BE SOLVED: To provide a high strength α+β type titanium alloy plate which is excellent in bendability and is also excellent in bending anisotropy.;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 area ratio of an α phase with a circle equivalent diameter of ≥1 μm is 20-53%, and the average aspect ratio of the α phase with a circle equivalent diameter of ≥1 μm is equal to or lower than 2.0.;COPYRIGHT: (C)2012,JPO&INPIT