COBALT-BASED ALLOY POWDER, COBALT-BASED ALLOY SINTERED BODY, AND METHOD FOR MANUFACTURING COBALT-BASED ALLOY SINTERED BODY

WIPO Patent Application WO/2020/179207

A1

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.

WANG YUTING (JP)
IMANO SHINYA (JP)

PCT/JP2019/051097

September 10, 2020

December 26, 2019

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MITSUBISHI HITACHI POWER SYS (JP)

C22C19/07; B22F1/05; C22C1/04; C22C1/05; C22F1/10; C22F1/00

WO2019031577A1

2019-02-14

JP2017186620A	2017-10-12
JP2016102229A	2016-06-02
CN107513642A	2017-12-26
JP2019049022A	2019-03-28
JPS61243143A	1986-10-29
JPH07179967A	1995-07-18

See also references of EP 3725901A4

POLAIRE I.P.C. (JP)

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