Title:
機械部品
Document Type and Number:
Japanese Patent JP7154080
Kind Code:
B2
Abstract:
To provide a machine component made of titanium alloy with improved mechanical properties.SOLUTION: A machine component is made of titanium alloy. The titanium alloy has a plurality of crystal grains including α' crystal grains. The crystal grains are sectioned into a first group and a second group. The minimum value of a crystal grain diameter of crystal grains belonging to the first group is larger than the maximum value of a crystal grain diameter of crystal grains belonging to the second group. A value obtained by dividing the total area of the crystal grains belonging to the first group by the total area of the crystal grains is 0.7 or more. A value obtained by dividing the total area of crystal grains belonging to the first group excluding crystal grains having the smallest crystal grain diameter belonging to the first group by the total area of the crystal grains is less than 0.7. An average grain diameter of the crystal grains belonging to the first group is 6 μm or less.SELECTED DRAWING: Figure 1
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Inventors:
Masahiro Yamada
Oki power
Oki power
Application Number:
JP2018174547A
Publication Date:
October 17, 2022
Filing Date:
September 19, 2018
Export Citation:
Assignee:
ntn corporation
International Classes:
C22C14/00
Domestic Patent References:
| JP2011068955A | ||||
| JP2010255023A | ||||
| JP2004131761A | ||||
| JP2013503970A |
Foreign References:
| US20100065158 |
Attorney, Agent or Firm:
Patent Attorney Fukami Patent Office
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