C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/54 (2006.01) B22F 3/105 (2006.01) C22C 38/42 (2006.01)
Patent
CA 2686261
A method of sintering a 17-4PH alloy powder and a sintered 17-4PH sintered part are disclosed. The part is formed by selective laser sintering a 17-4PH alloy powder and binder mixture to form a green part that is sintered to form a part having a substantially pure martensitic structure. The metal powder includes boron. The sintered part may be further processed by shot peening to improve crack resistance.
Cette invention concerne un procédé de frittage d'une poudre d'alliage 17-4PH et une pièce frittée d'acier 17-4PH. La pièce est formée par frittage laser sélectif d'une poudre d'alliage 17-4PH et d'un mélange liant pour former une pièce crue qui est frittée pour former une pièce ayant une structure martensitique sensiblement pure. La poudre métallique comprend du bore. La pièce frittée peut être soumise à un traitement ultérieur de grenaillage pour améliorer la résistance à la fissuration.
Ake Bryan E.
Clark Jerry G.
Low Steven C.
Muylaert Neal W.
Nord Richard J.
Bull Housser & Tupper Llp
The Boeing Company
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