EP 1561832 A1 20050810 - Method to make sinter-hardened powder metal parts with complex shapes
Title (en)
Method to make sinter-hardened powder metal parts with complex shapes
Title (de)
Verfahren zur Herstellung von sintergeharteten Teilen mit komplizierten Formen
Title (fr)
Procédé de production d'articles durcis par frittage de formes complexes
Publication
Application
Priority
US 76615404 A 20040128
Abstract (en)
A method of producing parts from powdered metals is disclosed, comprising the following steps. A metallurgical powder is provided, consisting of iron, 0.3-1.0 weight percent carbon, 0-4 weight percent chromium, 0-3 weight percent copper, 0.5-1.5 weight percent molybdenum, 0.5-4.5 weight percent nickel, 0-1.0 weight percent manganese, and 0-1.5 weight percent silicon. Metal powders are made by atomization and mixing. The powder metal parts are made by compacting, pre-sintering, profile/form grinding, sinter furnace hardening, and secondary operations. Profile/form grinding generates profiles, which can not be formed by compaction tooling, such as undercut. The specific pre-sinter cycle makes parts strong enough for profile grinding with prolonged tool life. Powder metal parts made by this invention are also disclosed. <IMAGE>
IPC 1-7
IPC 8 full level
B22F 3/10 (2006.01); B22F 3/00 (2006.01); B22F 3/12 (2006.01); B22F 3/16 (2006.01); B22F 3/24 (2006.01); B22F 5/08 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); F16H 55/06 (2006.01)
CPC (source: EP KR US)
B22F 3/03 (2013.01 - KR); B22F 3/12 (2013.01 - KR); B22F 3/16 (2013.01 - EP US); B22F 3/24 (2013.01 - EP KR US); B22F 5/08 (2013.01 - EP US); B22F 2003/247 (2013.01 - EP KR US); B22F 2003/248 (2013.01 - EP KR US); B22F 2998/10 (2013.01 - EP US)
C-Set (source: EP US)
B22F 2998/10 + B22F 3/02 + B22F 3/10 + B22F 3/10 + B22F 3/24
Citation (search report)
- [AD] US 6148685 A 20001121 - CADLE TERRY M [US], et al
- [A] WO 9413418 A1 19940623 - HOEGANAES AB [SE], et al
- [A] EP 0457418 A1 19911121 - HOEGANAES CORP [US]
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
EP 1561832 A1 20050810; CN 1647874 A 20050803; JP 2005213649 A 20050811; KR 20050077492 A 20050802; US 2005163645 A1 20050728
DOCDB simple family (application)
EP 05001266 A 20050121; CN 200510051845 A 20050127; JP 2005013482 A 20050121; KR 20050008005 A 20050128; US 76615404 A 20040128