ELECTRODE FOR DISCHARGE SURFACE TREATMENT AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2023/223583

A1

According to the present invention, a discharge surface treatment is carried out by means of an electrode which comprises a sintered body that is produced by: forming an electrode powder which is composed of a small-diameter metal powder having a median diameter of 3 µm or less and a large-diameter metal powder having a median diameter of more than 3 µm but not more than 10 µm, the small-diameter metal powder and the large-diameter metal powder containing Cr and oxygen; mixing and granulating the small-diameter metal powder and the large-diameter metal powder; compression molding the granulated powder at a pressure of 20 MPa to 300 MPa; and sintering the thus-obtained powder compact at a temperature of 450°C to 950°C. With respect to this electrode, the sintered body is formed by sintering the small-diameter metal powder having a median diameter of 3 µm or less and the large-diameter metal powder having a median diameter of more than 3 µm but not more than 10 µm with each other; the small-diameter metal powder and the large-diameter metal powder contain Cr and oxygen; and the oxygen content ratio of the sintered body is 1.5% by mass to 4.0% by mass.

YOSHIZAWA HIROKI (JP)
ITO KAZUKI (JP)
HORAI HIROSHI (JP)

PCT/JP2022/045044

November 23, 2023

December 07, 2022

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IHI CORP (JP)

C23C26/00; B22F1/052; B22F1/10; B22F5/00; B22F9/08; C22C1/04; C22C19/05; C22C19/07; C22C38/00

WO2018087945A1	2018-05-17
WO2008032359A1	2008-03-20

JP2015140461A

2015-08-03

MIYOSHI Hidekazu et al. (JP)

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