METHOD AND DEVICE FOR DISCHARGE SURFACE TREATMENT

WIPO Patent Application WO/2000/050194

A1

A method and a device for discharge surface treatment, wherein a sintered electrode (12), obtained by mixing iron group metal powder or non-iron group metal powder having the same component as that of a work (2) singly or in combination into powder manufactured by combining metal carbides belonging to IVa, Va and VIa groups in the periodic table singly or in combination, compression-molding the mixture and presintering the molded mixture, is used as a discharge machining electrode, a switching means is provided which is adapted to switch, according to the characteristics of a material to be treated, between an electric condition under which the base material of the work (2) is directly discharge-surface-treated and another electric condition under which a hard formed coating (13) is discharge-surface-treated, and discharging is performed continuously between the sintered electrode (12) and the work (2) to continuously keep hard coatings (13) deposited on the surface of the work (2) using the discharge energy, thereby forming a thick film.

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MOHRI NAOTAKE (JP)
YOSHIDA MANABU (JP)
GOTO AKIHIRO (JP)

PCT/JP1999/000822

August 31, 2000

February 24, 1999

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MITSUBISHI ELECTRIC CORP (JP)
MOHRI NAOTAKE (JP)
YOSHIDA MANABU (JP)
GOTO AKIHIRO (JP)

B23H9/00; C23C24/08; C23C24/10; C23C26/00; C23C26/02; (IPC1-7): B23H9/00; C23C26/00

JPH08300227A	1996-11-19
JPH06246542A	1994-09-06
JPH10512A	1998-01-06
JPH05261624A	1993-10-12
JPS5542708A	1980-03-26

Miyata, Kaneo (Marunouchi 2-chome Chiyoda-ku Tokyo, JP)

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