Production method of metal product, metal product,...

Details Production method of metal product, metal product,... Production method of metal product, metal product,...

C - Chemistry, Metallurgy

23

C

C23C 26/00 (2006.01) B22D 29/00 (2006.01) B23H 5/00 (2006.01) C21D 9/50 (2006.01)

Patent

CA 2528886

A product body is formed, and a defect peripheral portion including a defect produced in the treated surface of the product body by the forming is removed to form a recess in the treated surface. By using a molded body molded from a metal powder or a molded electrode fabricated from the heat-treated molded body, pulse discharge is caused between the recess peripheral portion including the recess and the molded electrode in an electrically insulating liquid or in the air. On the material of the molded electrode, deposition is formed by using the discharge energy to gradually form a build-up around the recess.

L'invention concerne le corps d'un produit façonné, dont une partie périphérique défectueuse, comportant un défaut créé dans la surface traitée du corps du produit lors du façonnage, est extraite pour former un évidement dans ladite surface traitée. Selon l'invention, on utilise un élément moulé à base de poudre métallique ou une électrode moulée à partir de l'élément moulé traité thermiquement, puis une impulsion est déchargée entre la partie périphérique comportant l'évidement et l'électrode moulée dans un liquide électriquement isolant ou dans l'air. On forme un dépôt sur la matière de l'électrode moulée au moyen de l'énergie de décharge pour former progressivement une accumulation autour de l'évidement.

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