Title:
熱間鍛造用のチタンアルミナイド合金材及びチタンアルミナイド合金材の鍛造方法並びに鍛造体
Document Type and Number:
Japanese Patent JP7233659
Kind Code:
B2
Abstract:
A TiAl alloy material for hot forging has a chemical composition including, by atom, Al of 43.0% or greater and 45.0% or less, Nb of 4.0% or greater and 6.0% or less, Cr of 1.5% or greater and 3.5% or less, and Ti and inevitable impurities as a residue. The TiAl alloy material for hot forging may further include boron as necessary. The TiAl alloy material for hot forging is prepared and kept at a temperature within a range of a phase equilibrium temperature of any of a β-phase, a (β+α) phase, and a (β+α+γ) phase in a phase diagram of a TiAl alloy so as to be forged in a non-oxidizing atmosphere. The TiAl alloy material for hot forging is subjected to a first heat treatment and a second heat treatment after forging. This improves isothermal forgeability of the TiAl alloy material, so as to execute the hot forging at a lower forging temperature.
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Inventors:
Keiji Kufu Shiro
Yutaro Ota
Satoshi Takahashi
Takeyama Masao
Hirotoyo Nakajima
Ryosuke Yamagata
Yutaro Ota
Satoshi Takahashi
Takeyama Masao
Hirotoyo Nakajima
Ryosuke Yamagata
Application Number:
JP2021507142A
Publication Date:
March 07, 2023
Filing Date:
February 27, 2020
Export Citation:
Assignee:
Ihi Co., Ltd.
National University Corporation Tokyo Institute of Technology
National University Corporation Tokyo Institute of Technology
International Classes:
C22C14/00; B21J5/00; C22F1/18
Domestic Patent References:
| JP8120372A | ||||
| JP2016166418A | ||||
| JP2015004092A | ||||
| JP6116691A |
Foreign References:
| CN103409660A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Shunichi Takahashi
Masakazu Ito
Toshio Takamatsu
Shunichi Takahashi
Masakazu Ito
Toshio Takamatsu