Title:
COBALT-BASED ALLOY MATERIAL AND COBALT-BASED ALLOY PRODUCT
Document Type and Number:
WIPO Patent Application WO/2022/049716
Kind Code:
A1
Abstract:
A Co-based alloy product according to the present invention is characterized by having a chemical composition containing, in % by mass, 0.08 to 0.25% of C and 0.003 to 0.2% of N in which the total of C and N is 0.083 to 0.28%, also containing 0.1% or less of B and 10 to 30% of Cr, also containing 5% or less of Fe and 30% or less of Ni in which the total of Fe and Ni is 30% or less, also containing W and/or Mo in which the total of W and Mo is 5 to 12%, also containing Al and/or Si in which the content of at least one of Al and Si is more than 0.5% and not more than 3% and the total of Al and Si is more than 0.5% and not more than 4%, also containing 0.5% or less of Mn, and also containing 0.5 to 4% of an M component that is a transition metal other than W and Mo and has an atomic radius of more than 130 pm, with the remainder comprising Co and impurities, in which the product is a polycrystal body composed of matrix phase crystal grains, segregation cells which have an average size of 0.13 to 2 μm and in which the M component is segregated in boundary regions are formed or post-segregation cells having an average size of 0.13 to 2 μm are formed in the matrix phase crystal grains, and an MC-type carbide phase, an M(C,N)-type carbonitride phase and/or an MN-type nitride phase each containing the M component is dispersed/precipitated along the boundaries of the post-segregation cells.
Inventors:
WANG YUTING (JP)
IMANO SHINYA (JP)
OTA ATSUO (JP)
IMANO SHINYA (JP)
OTA ATSUO (JP)
Application Number:
PCT/JP2020/033546
Publication Date:
March 10, 2022
Filing Date:
September 04, 2020
Export Citation:
Assignee:
MITSUBISHI POWER LTD (JP)
International Classes:
B22F3/16; B22F3/105; B33Y70/00; B33Y80/00; C22C19/07; F01D9/02; F01D25/00
Foreign References:
| JP2019173175A | 2019-10-10 | |||
| JP2019049022A | 2019-03-28 | |||
| JP2016102257A | 2016-06-02 | |||
| JP2017145483A | 2017-08-24 | |||
| JPS6311638A | 1988-01-19 | |||
| JP2019049022A | 2019-03-28 |
Other References:
See also references of EP 3991879A4
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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