C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 26/00 (2006.01) F02C 7/00 (2006.01)
Patent
CA 2600080
A method for forming a dense coating on a limited region of a subject body is disclosed. The method is composed of the steps of: applying one selected from the group of a compressed body of a powder of a metal and a sintered compressed body of a powder of a metal to a working electrode; executing discharge deposition to deposit a first coating from the working electrode on the subject body by applying the subject body as a workpiece of the discharge deposition; executing discharge deposition to deposit a second coating from the working electrode on the first coating by applying the subject body as a workpiece of the discharge deposition; and heating the subject body in one selected from the group of a vacuum, an air and an oxidizing atmosphere so as to densify the second coating or oxidizing the second coating at least in part to generate a solid lubricant substance.
L~invention concerne une méthode de formation d~une pellicule avec une portion densifiée sur une partie limitée d'objet. La méthode comporte les étapes suivantes : application d~un corps comprimé en poudre de métal ou d'un corps comprimé en poudre de métal fritté à une électrode de traitement ; émission d'accumulation d~une première pellicule sur l'objet formant pièce depuis l~électrode de traitement ; émission d'accumulation d~une seconde pellicule sur la première pellicule placée sur l~objet formant pièce depuis l~électrode de traitement ; et chauffage de l'objet de manière à accroître la densité de la deuxième pellicule soit sous vide, soit à l'air, soit sous atmosphère oxydante.
Furukawa Takashi
Ochiai Hiroyuki
Ootera Issei
Watanabe Mitsutoshi
Gowling Lafleur Henderson Llp
Ihi Corporation
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