Title:
COBALT-BASED ALLOY POWDER, COBALT-BASED ALLOY SINTERED BODY, AND METHOD FOR MANUFACTURING COBALT-BASED ALLOY SINTERED BODY
Document Type and Number:
WIPO Patent Application WO/2020/179207
Kind Code:
A1
Abstract:
Provided are a Co-based alloy powder, a Co-based alloy sintered body, and a method for manufacturing a Co-based alloy sintered body capable of providing a Co-based alloy material having mechanical characteristics equivalent to or greater than a precipitation-strengthened Ni-based alloy material. A Co-based alloy powder according to the present invention is characterized by: including 0.08 mass% to 0.25 mass% of carbon, 0.1 mass % or less of boron, 10 mass% to 30 mass% of chromium, 5 mass% or less of iron, and 30 mass% or less of nickel; including said elements such that the total of iron and nickel is 30 mass% or less; including at least one of tungsten and molybdenum such that the total thereof is 5 mass% to 12 mass%; including at least one of titanium, zirconium, niobium, tantalum, hafnium, and vanadium such that the total thereof is 0.5 mass% to 2 mass%; including 0.5 mass% or less of silicon, 0.5 mass% or less of manganese, and 0.003 mass% to 0.04 mass% of nitrogen, the remainder comprising cobalt and impurities; crystal grains, which constitute the cobalt-based alloy powder, having segregated cells; and the average size of the segregated cells being 0.15 µm to 4 µm.
Inventors:
WANG YUTING (JP)
IMANO SHINYA (JP)
IMANO SHINYA (JP)
Application Number:
PCT/JP2019/051097
Publication Date:
September 10, 2020
Filing Date:
December 26, 2019
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS (JP)
International Classes:
C22C19/07; B22F1/05; C22C1/04; C22C1/05; C22F1/10; C22F1/00
Domestic Patent References:
WO2019031577A1 | 2019-02-14 |
Foreign References:
JP2017186620A | 2017-10-12 | |||
JP2016102229A | 2016-06-02 | |||
CN107513642A | 2017-12-26 | |||
JP2019049022A | 2019-03-28 | |||
JPS61243143A | 1986-10-29 | |||
JPH07179967A | 1995-07-18 |
Other References:
See also references of EP 3725901A4
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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