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1. (WO2010030880) FREE-MACHINING POWDER METALLURGY STEEL ARTICLES AND METHOD OF MAKING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/030880    International Application No.:    PCT/US2009/056661
Publication Date: 18.03.2010 International Filing Date: 11.09.2009
IPC:
B22F 3/15 (2006.01), B22F 5/12 (2006.01), B22F 9/08 (2006.01), C22C 33/02 (2006.01), C21D 8/06 (2006.01)
Applicants: CRS HOLDINGS, INC. [US/US]; 1105 North Market Street Suite 601 Wilmington, DE 19801 (US) (For All Designated States Except US).
L. KLEIN SA [CH/CH]; Ch.du Long-Champ 110 CH-2501 Bienne (CH) (For All Designated States Except US).
SCHIESS, Olivier [CH/CH]; (CH) (For US Only).
MARECHAL, Pierre [CH/CH]; (CH) (For US Only).
DEL CORSO, Gregory, J. [US/US]; (US) (For US Only)
Inventors: SCHIESS, Olivier; (CH).
MARECHAL, Pierre; (CH).
DEL CORSO, Gregory, J.; (US)
Agent: PACE, Vincent, T.; Dann, Dorfman, Herrell And Skillman, P.C. 1601 Market Street, Suite 2400 Philadelphia, PA 19103-2307 (US)
Priority Data:
61/096,504 12.09.2008 US
Title (EN) FREE-MACHINING POWDER METALLURGY STEEL ARTICLES AND METHOD OF MAKING SAME
(FR) ARTICLES EN ACIER DE MÉTALLURGIE DES POUDRES SANS USINAGE ET PROCÉDÉS DE FABRICATION DE CEUX-CI
Abstract: front page image
(EN)A small diameter, elongated steel article, comprising fully consolidated, prealloyed metal powder is disclosed. The consolidated metal powder has a microstructure that has a substantially uniform distribution of fine grains having a grain size of not larger than about 9 when determined in accordance with ASTM Standard Specification E 112. The microstructure of the consolidated metal powder is further characterized by having a plurality of substantially spheroidal carbides uniformly distributed throughout the consolidated metal powder that are not greater than about 6 microns in major dimension and a plurality of sulfides uniformly distributed throughout the consolidated metal powder wherein the sulfides are not greater than about 2 microns in major dimension. A process for making the elongated steel article is also disclosed.
(FR)La présente invention concerne un article en acier allongé, de faible diamètre, comprenant de la poudre de métal préallié totalement consolidée. La poudre de métal consolidée a une microstructure qui a une distribution sensiblement uniforme de grains fins ayant une taille de grain de pas plus d’environ 9 lorsqu’elle est déterminée selon la spécification de norme ASTM E 112. La microstructure de la poudre de métal consolidée est caractérisée plus avant en ce qu’elle a une pluralité de carbures sphéroïdaux uniformément distribués dans l’ensemble de la poudre de métal consolidée qui ne font pas plus d’environ 6 microns dans leur dimension majeure et une pluralité de sulfures uniformément distribués dans l’ensemble de la poudre de métal consolidée, les sulfures ne faisant pas plus d’environ 2 microns dans leur dimension majeure. La présente invention concerne en outre un procédé pour fabriquer l’article en acier allongé.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)