| (19) |
 |
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(11) |
EP 3 042 974 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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03.08.2016 Bulletin 2016/31 |
| (43) |
Date of publication A2: |
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13.07.2016 Bulletin 2016/28 |
| (22) |
Date of filing: 04.01.2016 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
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Designated Extension States: |
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BA ME |
|
Designated Validation States: |
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MA MD |
| (30) |
Priority: |
06.01.2015 JP 2015000678
|
| (71) |
Applicant: Seiko Epson Corporation |
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Tokyo 163-0811 (JP) |
|
| (72) |
Inventors: |
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- Tamura, Takayuki
Aomori, 039-1161 (JP)
- Nakamura, Hidefumi
Aomori, 039-1161 (JP)
|
| (74) |
Representative: Hoffmann Eitle |
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Patent- und Rechtsanwälte PartmbB
Arabellastraße 30
81925 München
81925 München (DE) |
|
| |
|
| (54) |
METAL POWDER FOR POWDER METALLURGY, COMPOUND, GRANULATED POWDER, AND SINTERED BODY |
(57) A metal powder for powder metallurgy according to the invention contains Fe as a
principal component, Cr in a proportion of 15 mass% or more and 26 mass% or less,
Ni in a proportion of 7 mass% or more and 22 mass% or less, Si in a proportion of
0.3 mass% or more and 1.2 mass% or less, and C in a proportion of 0.005 mass% or more
and 0.3 mass% or less, wherein when two elements selected from the group consisting
of Ti, V, Y, Zr, Nb, Hf, and Ta are defined as a first element and a second element,
the first element is contained in a proportion of 0.01 mass% or more and 0.5 mass%
or less and the second element is contained in a proportion of 0.01 mass% or more
and 0.5 mass% or less. Further, the metal powder for powder metallurgy preferably
has an austenite crystal structure.