Title:
α＋β型チタン合金線材及びα＋β型チタン合金線材の製造方法
Document Type and Number:
Japanese Patent JP6965986
Kind Code:
B2
Abstract:
To realize further excellent fatigue properties. An α+β type titanium alloy wire contains, in mass%, Al: 4.50 to 6.75%, Si: 0 to 0.50%, C: 0.080% or less, N: 0.050% or less, H: 0.016% or less, O: 0.25% or less, Mo: 0 to 5.5%, V: 0 to 4.50%, Nb: 0 to 3.0%, Fe: 0 to 2.10%, Cr: 0 to less than 0.25%, Ni: 0 to less than 0.15%, Mn: 0 to less than 0.25%, and the balance being Ti and impurities, the contents of Al, Mo, V, Nb, Fe, Cr, Ni, and Mn satisfying an equation (1), in which an average aspect ratio of an α crystal grain is 1.0 to 3.0, a maximum crystal grain diameter of the α crystal grain is 30.0 µm or less, an average crystal grain diameter of the α crystal grain is 1.0 to 15.0 µm, and an area ratio of the α crystal grain, out of the α crystal grains in a cross section orthogonal to a long axis direction of the wire, regarding which an inclination angle in a c-axis direction of a hexagonal close packing crystal that forms the α crystal grain relative to the long axis direction is within a range of 15° to 40°, is 5.0% or less.
Inventors:
Ryotaro Miyoshi
Kunieda Chitoku
High Kazuhiro Hashi
山▲崎▼ 達夫
Satoshi Kawakami
Kunieda Chitoku
High Kazuhiro Hashi
山▲崎▼ 達夫
Satoshi Kawakami
Application Number:
JP2020504735A
Publication Date:
November 10, 2021
Filing Date:
October 07, 2019
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C14/00; C22F1/18
Domestic Patent References:
| JP2013533386A | ||||
| JP2007501903A | ||||
| JP60046358A |
Other References:
ZENG L. et al.,Effects of working, heat treatment, and aging on microstructural evolution and crystallographic text,Materials Science and Engineering A,2005年,Vol.392,p.403-414
Attorney, Agent or Firm:
Koji Hagiwara
Tetsuo Kanamoto
Naoki Ogita
Takashi Saito
Takuya Mine
Tetsuo Kanamoto
Naoki Ogita
Takashi Saito
Takuya Mine