Title:
METHOD FOR PREPARING ARTICLE, METHOD FOR REDUCING CYCLE TIME, AND COLD FORMING METHOD
Document Type and Number:
Japanese Patent JP3873021
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for preparing titanium or titanium-alloy articles having an ultra-fine grain structure without using a heat treatment step.
SOLUTION: A coarse-grained titanium or titanium-alloy material typically is heated and forced under constant pressure through a friction stir processing tooling device containing a stirring chamber and a stirring rod. As the material is passed through the stirring chamber, the stirring rod stirs the titanium or titanium-alloy material to obtain a homogeneous or uniform material condition. As the processed material exits the stirring chamber of the friction stir processing tooling device, it reconsolidates as an extremely homogeneous structure having ultra-fine grain structure. The titanium or titanium alloy processed to attain the ultra-fine grain material structure can be manufactured into aerospace structure articles, such as fasteners and articles, requiring no subsequent heat treatment step.
Inventors:
Stephen the Keener
Edward Litubinski
Edward Litubinski
Application Number:
JP2002355193A
Publication Date:
January 24, 2007
Filing Date:
December 06, 2002
Export Citation:
Assignee:
The Boeing Company
International Classes:
B22D1/00; B21C37/02; C22F1/18; B21J5/00; B21K1/58; B23K20/233; C22C14/00; C22F1/00; (IPC1-7): C22F1/18; B21J5/00; B22D1/00; C22C14/00; //C22F1/00
Domestic Patent References:
| JP10183316A | ||||
| JP2000336465A | ||||
| JP200132058A | ||||
| JP2001181809A |
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai