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    • 2. 发明公开
    • TIAL ALLOY PRODUCTION METHOD AND TIAL ALLOY
    • EP3974081A1
    • 2022-03-30
    • EP20810725.0
    • 2020-03-18
    • IHI Corporation
    • KUBUSHIRO, Keiji
    • B21J1/06B21J5/00B21K3/04C22C14/00C22C1/00C22F1/00C22F1/18
    • A method of manufacturing a TiAl alloy includes a casting step of melting and casting a TiAl alloy raw material which contains 42 at% or more and 45 at% or less of Al, 3 at% or more and 6 at% or less of Nb, 3 at% or more and 6 at% or less of V, 0.1 at% or more and 0.3 at% or less of B, and the balance being Ti and inevitable impurities, a hot forging step of hot forging the cast TiAl alloy by heating the cast TiAl alloy to a temperature range between 1200 °C or higher and 1350 °C or lower, and a thermal treatment step of holding the hot-forged TiAl alloy at a temperature range between 1220 °C or higher and 1300 °C or lower for a hour range between 1 hour or longer and 5 hours or shorter, applying a first thermal treatment to the hot-forged TiAl alloy, cooling the TiAl alloy subjected to the first thermal treatment to a temperature range between 1000 °C or higher and 1100 °C or lower at a cooling rate of 400 °C/hour or more, holding the TiAl alloy subjected to the first thermal treatment at a temperature range between 1000 °C or higher and 1100 °C or lower for a hour range between 1 hour or longer and 4 hours or shorter, applying a second thermal treatment to the TiAl alloy subjected to the first thermal treatment, and rapidly cooling the TiAl alloy subjected to the second thermal treatment.
    • 9. 发明公开
    • HOLLOW FAN BLADE PREPARATION METHOD
    • HERSTELLUNGSVERFAHRENFÜRHOHLEGEBLÄSESCHAUFEL
    • EP3081319A4
    • 2017-08-23
    • EP14870491
    • 2014-12-11
    • INST FOR METALS SUPERPLASTICITY PROBLEMS OF THE RUSSIAN ACAD OF SCIENCESOPEN JOINT STOCK COMPANY AVIADVIGATELJOINT STOCK COMPANY UFA ENGINE IND ASS
    • INOZEMTSEV ALEXANDER ALEXANDROVICHMULYUKOV RADIK RAFIKOVICHPAVLINICH SERGEY PETROVICHARTYUKHOV ALEXANDER VIKTOROVICHSAFIULLIN RINAT VLADIKOVICHTRIFONOV VADIM GENNADIEVICHKHARIN SERGEY ALEXANDROVICHMANAPOV IREK USMANOVICHMOROZOV MIKHAIL ALEXANDROVICH
    • B21D53/78B21D26/02B21K3/04B23P15/04
    • B21D53/78B21D26/055B23P15/04
    • The invention relates to metal forming using diffusion welding and superplastic forming. Stop-off material is preliminarily applied in a predetermined screen pattern to areas where surfaces of skin and core preforms come into contact. Skin preforms are provided with a groove, and core preform is provided with a slot for mounting at least one tube. A stack is sealed along edges with the exception of where at least one tube is to be mounted. A tube is mounted to be connected to a collector zone, and oxygen and binder of the stop-off material are removed from cavities in the stack. The stack is fully sealed, heated, and the preforms are diffusion-welded in predetermined areas, also along an entrance edge, an exit edge and a peripheral edge. An integral structural preform is given an airfoil shape and subjected to superplastic forming by supplying working fluid into cavities between the skin and core preforms through also at least one tube. The collector zone is disposed on the side of the stack, which corresponds to the peripheral edge of the blade. For mounting one or more tubes for supplying working fluid at superplastic forming, the groove in the skin preforms and the slot in the core preform are provided at a distance from the outer boundary of the entrance edge or exit edge less than L/3, where L is the length of the blade chord along the peripheral edge. It is thus possible to eliminate risk of defects during blade forming without compromising performance characteristics of the blade and increase in labor intensity of producing same.
    • 本发明涉及使用扩散焊接和超塑性成形的金属成形。 阻挡材料预先以预定的屏幕图案施加到表皮和芯预制件的表面接触的区域。 蒙皮预制件设置有凹槽,并且芯预制件设有用于安装至少一个管的狭槽。 除了要安装至少一个管子的地方以外,堆栈沿着边缘密封。 安装管以连接到收集器区域,并且停止材料的氧气和粘合剂从堆叠中的空腔移除。 叠层完全密封,加热,并且预成型件也沿着入口边缘,出口边缘和外围边缘扩散焊接在预定区域中。 整体结构预成型件被赋予翼型形状并且通过还通过至少一个管道将工作流体供应到表层和型芯预成型件之间的腔体中而经受超塑性成形。 收集器区域设置在堆叠的一侧上,其对应于叶片的外围边缘。 为了在超塑成形中安装一个或多个用于供应工作流体的管道,预成型件中的凹槽和芯预成型件中的槽设置成距入口边缘或出口边缘的外边界小于L / 3,其中 L是沿着外围边缘的叶片弦的长度。 因此可以在叶片成形期间消除缺陷的风险,而不损害叶片的性能特性并增加生产叶片的劳动强度。