EP 3261789 A1 20180103 - COMPACTING OF GAS ATOMIZED METAL POWDER TO A PART
Title (en)
COMPACTING OF GAS ATOMIZED METAL POWDER TO A PART
Title (de)
VERDICHTUNG VON GASZERSTÄUBTEM METALLPULVER ZU EINEM TEIL
Title (fr)
COMPACTAGE DE POUDRE MÉTALLIQUE DISPERSÉE PAR JET DE GAZ SUR UNE PIÈCE
Publication
Application
Priority
- SE 1550209 A 20150225
- EP 2016053852 W 20160224
Abstract (en)
[origin: WO2016135187A1] A process for making full dense components of a carbon-containing steel, comprises the steps of: a) making a powder of the carbon-containing steel by gas atomization wherein the carbon content is low, less than 0.15 wt%, b) agglomerating the powder from step a) with at least one hydrocolloid and elemental carbon, c) compacting the agglomerated powder from step b) to a density of at least 80%of theoretical density, with the proviso that the compacted agglomerated powder still is porous allowing transport of gas to and from its interior, and d) sintering the compacted powder to a density of more than 98% of theoretical density, preferably more than 99 % of theoretical density, wherein a gas comprising carbon is added during sintering and finally subjecting the component to HVC. Advantages include that it is possible to manufacture a dense component of powders which otherwise are difficult to compact.
IPC 8 full level
B22F 3/08 (2006.01); B22F 3/087 (2006.01); B22F 3/10 (2006.01); B22F 3/16 (2006.01); B22F 9/08 (2006.01); B30B 11/00 (2006.01); B30B 11/02 (2006.01); C21D 3/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C23C 8/20 (2006.01); C23C 8/64 (2006.01)
CPC (source: EP US)
B22F 3/087 (2013.01 - EP US); B22F 3/1007 (2013.01 - EP US); B22F 3/16 (2013.01 - EP US); B22F 9/082 (2013.01 - US); B30B 11/027 (2013.01 - EP US); C21D 1/74 (2013.01 - EP US); C21D 3/04 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/004 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C23C 8/22 (2013.01 - EP US); C23C 8/66 (2013.01 - EP US); B22F 2301/35 (2013.01 - EP US); B22F 2998/10 (2013.01 - EP US); B22F 2999/00 (2013.01 - EP US); B30B 11/00 (2013.01 - US)
Citation (search report)
See references of WO 2016135187A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2016135187 A1 20160901; CN 107567362 A 20180109; EP 3261789 A1 20180103; US 2017361378 A1 20171221
DOCDB simple family (application)
EP 2016053852 W 20160224; CN 201680023892 A 20160224; EP 16706180 A 20160224; US 201615545015 A 20160224