Warm compaction of steel powders

B - Operations – Transporting – 22 – F

Patent

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Details

B22F 1/00 (2006.01) B22F 3/12 (2006.01) C22C 33/02 (2006.01)

Patent

CA 2343540

The present invention concerns a process of preparing high density, warm compacted bodies of a stainless steel powder comprising the steps of providing a mixture of a low carbon, low oxygen stainless steel powder including 10-30 % by weight of Cr, optional alloying elements and graphite and inevitable impurities, mixing the powder with a high temperature lubricant and compacting the mixture at an elevated temperature. The invention also concerns a composition of the stainless steel powder, optional additional alloying elements and a high temperature lubricant.

La présente invention concerne un procédé de préparation de corps en poudre d'acier inoxydable compactés à chaud à haute densité, le procédé consistant à prendre un mélange de poudre d'acier inoxydable à faible teneur en carbone et faible teneur en oxygène contenant 10 à 30 % en poids de Cr, éventuellement des éléments d'alliage, du graphite et des impuretés inévitables, à mélanger la poudre avec un lubrifiant à haute température, puis à compacter le mélange à température élevée. L'invention concerne également une composition à base de poudre d'acier inoxydable, comprenant éventuellement des éléments d'alliage supplémentaires et un lubrifiant à haute température.

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