B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 1/00 (2006.01) B22F 3/00 (2006.01) C22C 33/02 (2006.01)
Patent
CA 2405415
The invention refers to a new method for preparing sintered structural parts of carbon or tool steels or high speed steel having a carbon content of up to 2 % by weight, wherein an agglomerated spherical powder comprising at least 0.5 % of a thermo-reversible hydrocolloid is pressed to a green body of high density which is then heated at 450-650 ~C to remove the non-carbon content of the hydrocolloid and subsequently sintered at about 1100-1400 ~C to structural parts having high strength properties.
L'invention concerne un nouveau procédé permettant de préparer des pièces structurelles frittées en aciers au carbone ou en aciers à outils ou en acier rapide ayant une teneur maximale en carbone de 2 % en poids, une poudre sphérique agglomérée contenant au moins 0.5 % d'une matière hydrocolloïdale thermo-reversible est pressée pour obtenir un corps vert de haute densité qui ensuite est chauffé à 450-650 ·C pour enlever le contenu non carbone de la matière hydrocolloïdale puis est fritté à environ 1100-1400 ·C pour obtenir des pièces structurelles aux propriétés de grande résistance.
Kirby Eades Gale Baker
Metals Process Systems
Scandinavian Powdertech Ab
LandOfFree
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