A maraging steel article and method of manufacture

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 38/52 (2006.01) B22F 5/00 (2006.01) C22C 33/02 (2006.01) C22C 38/44 (2006.01)

Patent

CA 2620209

A fully dense, powder-metallurgy produced maraging steel alloy article of prealloyed powder for use as a tool for high temperature applications. The article in the as-produced condition having a hardness less than 40 HRC to provide machinability and thereafter the article upon maraging heat treatment having a hardness greater than 45 HRC. A method for producing this article comprises compacting prealloyed powder to produce a fully dense article having a hardness less than 40 HRC and thereafter maraging heat treating to a hardness greater than 45 HRC.

La présente invention concerne un article en alliage d~acier maraging de très haute densité produit en métallurgie des poudres constitué d~une poudre d~un pré-alliage destiné à un usage comme outil pour des applications à hautes températures. La présente invention concerne l~article dans les conditions de production ayant une dureté HRC inférieure à 40 pour conférer une certaine usinabilité et ensuite l'article après traitement thermique de maraging ayant une dureté HRC supérieure à 45. Un procédé de production de cet article comprend le compactage de la poudre de pré-alliage pour produire un article de très haute densité ayant une dureté HRC inférieure à 40 et ensuite le traitement thermique de maraging pour donner une dureté HRC supérieure à 45.

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