Title:
Ni-BASED SINGLE CRYSTAL ALLOY HAVING COATING FILM FOR PREVENTING RECRYSTALLIZATION FRACTURE
Document Type and Number:
WIPO Patent Application WO/1999/066089
Kind Code:
A1
Abstract:
A Ni-based single crystal alloy having a coating film for preventing recrystallization fracture being capable of preventing the intergranular fracture resulting from recrystallization, which comprises a Ni-based single crystal alloy containing none or a trace amount of a grain boundary-reinforcing metal and, coated on the surface thereof, a coating film of a Ni-based alloy containing at least one of the grain boundary-reinforcing elements composed of the group consisting of Zr, Hf, B and C, wherein the above grain boundary-reinforcing element is dispersed only on the surface of the above Ni-based single crystal alloy by a heat treatment of the coating film at a temperature which does not cause the recrystallization of the Ni-based single crystal alloy.
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Inventors:
Moriya, Keiichi (Mitsubishi Heavy Industries, Ltd. Takasago Research & Development
Center 1-1 Shinhama 2-chome Arai-cho, Takasago-shi Hyogo-ken, 676-8686, JP)
Application Number:
PCT/JP1999/003136
Publication Date:
December 23, 1999
Filing Date:
June 11, 1999
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (5-1 Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8315, JP)
Moriya, Keiichi (Mitsubishi Heavy Industries, Ltd. Takasago Research & Development Center 1-1 Shinhama 2-chome Arai-cho, Takasago-shi Hyogo-ken, 676-8686, JP)
Moriya, Keiichi (Mitsubishi Heavy Industries, Ltd. Takasago Research & Development Center 1-1 Shinhama 2-chome Arai-cho, Takasago-shi Hyogo-ken, 676-8686, JP)
International Classes:
C22C19/05; C23C14/16; C23C14/58; C23C26/00; C30B11/00; C30B33/00; (IPC1-7): C22C19/03
Attorney, Agent or Firm:
Okuyama, Hisao (Akasaka NOA Building 8th floor 2-12, Akasaka 3-chome Minato-ku Tokyo, 107-0052, JP)
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