Title:
α＋β型チタン合金押出形材
Document Type and Number:
Japanese Patent JP7087476
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an α+β type titanium alloy extruded shape using a Ti-Al-Fe-Mo-based α+β type titanium alloy having higher strength than Ti-Al-C as a raw material, and less in warpage and having fatigue strength and strength ductility balance equivalent to prior art even with having an acicular structure.SOLUTION: There is provided an α+β type titanium alloy extruded shape, containing Al:4.4 to 5.5%, Fe:1.4 to 2.3%, Mo:1.5 to 5.5%, O:over 0% and 0.20% or less, C:over 0% and 0.08% or less, N:over 0% and 0.05% or less, Si:over 0% and 0.1% or less, further selectively one or more kind of Ni:0% or more and less than 0.15%, Cr:0% or more and less than 0.25% and Mn:0% or more and less than 0.25% and the balance Ti with impurities of total amount of 0.4% or less, satisfying a relationship of 1.4%≤[Fe]+[Ni]+[Cr]+[Mn]≤2.3%, and having a metallic structure with an acicular structure and average of old β particle diameter of 300 μm or less.SELECTED DRAWING: Figure 2
Inventors:
Shinya Nishiyama
Yoshihisa Shirai
Yoshihisa Shirai
Application Number:
JP2018043259A
Publication Date:
June 21, 2022
Filing Date:
March 09, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C14/00
Domestic Patent References:
| JP2012126944A | ||||
| JP7180011A | ||||
| JP6184683A |
Foreign References:
| WO2016084980A1 |
Attorney, Agent or Firm:
Intellectual Property Office
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