| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an α-β titanium alloy extruded material excellent in fatigue strength, and a method for producing the α-β titanium alloy extruded material. <P>SOLUTION: The α-β titanium alloy extruded material includes, by mass, more than 0.08% and 0.25% or less C and 2.0-8.5% Al and contains, by mass, 2.0 to 10.0% in total of any of 5.0% or less V, 5.0% or less Cr, 2.5% or less Fe, 5.0% or less Mo, 5.0% or less Ni, 5.0% or less Nb, and 5.0% or less Ta, wherein the area rate of a primary α phase is 5 to 80%; the direction of the major axis of 80% or more of primary α grains in the primary α phase is in an angle range of within ±15° to the direction of extrusion of the titanium alloy extruded material; and the average minor axis of a secondary α phase is 0.1 μm or more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
