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1. (WO2018106581) COMPOSITIONS AND METHODS FOR SINTERING POWDERED METAL COMPACTS USING LITTLE OR NO HYDROGEN
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Pub. No.: WO/2018/106581 International Application No.: PCT/US2017/064466
Publication Date: 14.06.2018 International Filing Date: 04.12.2017
IPC:
B22F 9/04 (2006.01) ,B22F 1/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
9
Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
02
using physical processes
04
starting from solid material, e.g. by crushing, grinding or milling
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1
Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
Applicants: APEX ADVANCED TECHOLOGIES, LLC[US/US]; 4857-4 West 130th Street Cleveland, OH 44135, US
Inventors: HAMMOND, Dennis, L.; US
Agent: DIGGES, Randolph, E., III; US
Priority Data:
62/431,97009.12.2016US
Title (EN) COMPOSITIONS AND METHODS FOR SINTERING POWDERED METAL COMPACTS USING LITTLE OR NO HYDROGEN
(FR) COMPOSITIONS ET PROCÉDÉS POUR FRITTER DES PASTILLES MÉTALLIQUES EN POUDRE EN UTILISANT PEU OU PAS D'HYDROGÈNE
Abstract:
(EN) Metal powder compositions for pressed powder metallurgy, and methods of forming metal parts using the metal powder compositions. The metal powder compositions include a metal powder and a lubricant system, which are pressed to form a green compact. When the green compact is heated during a delubing process, the lubricant system provides a reactive carbon coating on the surface of the metal powder, which upon subsequent sintering, reacts with metal oxides present on the surface of the metal powder to form gas that is easily removed from the system. Removing the metal oxides from the surface of the metal powder provides a more dense metal part, and allows for sintering of the green compact without the need for hydrogen gas, which would otherwise be needed to remove the metal oxides on the surface of the metal powder.
(FR) L'invention concerne des compositions de poudre métallique pour la métallurgie des poudres pressées, ainsi que des procédés de formation de pièces métalliques à l'aide des compositions de poudre métallique. Les compositions de poudre métallique comprennent une poudre métallique et un système lubrifiant, qui sont pressés pour former une pastille verte. Lorsque la pastille verte est chauffée pendant un processus de délustrage, le système lubrifiant fournit un revêtement de carbone réactif sur la surface de la poudre métallique, qui, lors du frittage ultérieur, réagit avec des oxydes métalliques présents sur la surface de la poudre métallique pour former un gaz qui est facilement retiré du système. L'élimination des oxydes métalliques présents sur la surface de la poudre métallique fournit une pièce métallique plus dense, et permet le frittage de la pastille verte sans avoir besoin d'hydrogène gazeux, qui serait autrement nécessaire pour éliminer les oxydes métalliques sur la surface de la poudre métallique.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)