EP 1246950 A1 20021009 - COMPACTING AND SINTERING STEEL POWDER
Title (en)
COMPACTING AND SINTERING STEEL POWDER
Title (de)
PRESSEN UND SINTERN VON STAHLPULVER
Title (fr)
COMPRESSION ET FRITTAGE DE POUDRE D'ACIER
Publication
Application
Priority
- PL 0000098 W 20001214
- PL 33763799 A 19991231
Abstract (en)
[origin: WO0149891A1] The invention concerns a method of getting shaped elements by pressing, sintering and cold-compacting of powder mixtures of steel with alloy additions, being used for production of machine parts, e.g. gears, bearings and others of high surface pressure strength and wear resistance. The method is characterized in that a preformed semi-final product is treated with presintering, preferably in dissociated-ammonia atmosphere at temperature 700 - 750 DEG C, preferably 720 - 730 DEG C during 20 - 40 min, preferably 30 min, and first compacting under pressure 700 - 800 MPa, preferably 750 MPa, and then second compacting with simultaneous calibration under pressure 900 - 1000 MPa, preferably 950 MPa, then is treated with final sintering at temperature 1100 - 1200 DEG C, preferably 1120 - 1150 DEG C, during 40 - 50 min, preferably 45 min.
IPC 1-7
IPC 8 full level
B22F 3/16 (2006.01); C22C 33/02 (2006.01)
CPC (source: EP)
B22F 3/16 (2013.01); C22C 33/02 (2013.01); B22F 2998/10 (2013.01)
Citation (search report)
See references of WO 0149891A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0149891 A1 20010712; AT E245715 T1 20030815; DE 60004106 D1 20030828; DE 60004106 T2 20040422; EP 1246950 A1 20021009; EP 1246950 B1 20030723; PL 191806 B1 20060731; PL 337637 A1 20010702
DOCDB simple family (application)
PL 0000098 W 20001214; AT 00981941 T 20001214; DE 60004106 T 20001214; EP 00981941 A 20001214; PL 33763799 A 19991231