| 摘要 |
This invention relates to nonferrous metallurgy, namely to thermomechanical treatment of titanium alloys and can be used for manufacture of structural parts and components of high-strength near-beta titanium alloys for the aerospace application, mainly landing gear and airframe application. The method for thermomechanical treatment of titanium alloy consists of multiple heating operations to a temperature that is above or below beta transus temperature (BTT), hot working with the specified strain, and cooling. A technical result of this method is manufacture of near-net shape forgings with stable properties having sections with thickness 100 mm and over and length over 6 m with the following mechanical properties: 1. Ultimate tensile strength over 1200 MPa with fracture toughness, kappa1C, not less than 35 MPa√m. 2. Fracture toughness, kappa1C, over 70 MPa√m with ultimate tensile strength not less than 1100 MPa.
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