C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 33/02 (2006.01) B22F 3/26 (2006.01)
Patent
CA 2549175
The present invention provides iron-based infiltration methods for manufacturing powder metallurgy components, compositions prepared from those methods, and methods of designing those infiltration methods. Iron-based infiltration methods include the steps of providing an iron-based infiltrant composed of a near eutectic liquidus composition of a first iron based alloy system and an iron-based base compact composed of a near eutectic solidus powder composition of a second iron based alloy system. The base compact is place in contact with the infiltrant and heated to a process temperature above the melting point of the infiltrant to form a liquid component of the infiltrant. Lastly, the base compact is infiltrated with the liquid component of the infiltrant. During infiltration, the liquid component of the infiltrant flows into the pores of the base compact.
La présente invention concerne des procédés d'infiltration à base de fer pour la fabrication de composant en métallurgie des poudres, des compositions obtenues selon ces procédés, et des procédés de conception de ces procédés d'infiltration. Pour l'infiltration à base de fer, on se procure un infiltrant à base de fer fait, d'une part d'une composition de liquides quasiment eutectiques d'un premier système d'alliage au fer, et d'autre part d'un compact de base à base de fer fait d'une composition de poudres de solide quasiment eutectique d'un deuxième système d'alliage au fer. Le compact de base est placé au contact de l'infiltrant pour former un composant liquide de l'infiltrant. Enfin, le compact de base est infiltré avec le composant liquide de l'infiltrant. Pendant l'infiltration, le composant liquide de l'infiltrant coule dans les pores du compact de base.
Gowling Lafleur Henderson Llp
Hoeganaes Corporation
LandOfFree
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