发明公开
- 专利标题: MATERIAL FOR THE MANUFACTURE OF HIGH-STRENGTH FASTENERS AND METHOD FOR PRODUCING SAME
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申请号: EP21933400.0申请日: 2021-03-26
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公开(公告)号: EP4317497A1公开(公告)日: 2024-02-07
- 发明人: LEDER, Mikhail Ottovich , VOLKOV, Anatoliy Vladimirovich , GREBENSHCHIKOV, Aleksandr Sergeyevich , SHCHETNIKOV, Nikolay Vasilyevich
- 申请人: Public Stock Company "VSMPO-AVISMA Corporation"
- 申请人地址: RU Sverdlovskaya obl. 624760 Ul. Parkovaya 1 Verkhnaya Salda
- 代理机构: Letzelter, Felix Phillip
- 国际公布: WO2022203535 20220929
- 主分类号: C22C14/00
- IPC分类号: C22C14/00 ; C22F1/18 ; B21C1/00
摘要:
The invention relates to metallurgy, and more particularly to producing titanium alloy-based materials with specific mechanical properties for the manufacture of fasteners for use in various fields of industry and preferably in the aerospace industry. The claimed material for the manufacture of high-strength fasteners is made from a titanium alloy containing alloying elements in the form of α-stabilizers, #-stabilizers and neutral strengthening elements, the rest being titanium and unavoidable impurities. The size of a beta-sub grain in the structure of the material, which is subjected to solution annealing and aging, does not exceed 15 µm. The material for the manufacture of high-strength fasteners is produced in the form of round bar with a diameter of up to 40 mm or round wire with a diameter of up to 18 mm, which are subjected to solution annealing and aging. After solution annealing and aging, the material has an ultimate tensile strength of greater than 1400 MPa, an elongation of greater than 11%, a reduction in area of greater than 35% and a double shear strength of greater than 750 MPa. An intermediate blank for drawing is obtained by melting an ingot of titanium alloy, thermomechanically processing the ingot to obtain a forged billet and then rolling same. An intermediate blank for drawing is also obtainable using a powder metallurgy method.
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