Agglomerated iron-based powders

Details Agglomerated iron-based powders Agglomerated iron-based powders

1999-06-04

2000-09-19

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

B22F 100

Patent

active

061205753

ABSTRACT:
The invention concerns a process for the preparation of a free flowing agglomerated iron-based powder comprising mixing dry ingredients of: a) 63-95% by weight of a fine base powder consisting essentially of iron and having a particle size essentially less than 75 .mu.m; b) 5-20% by weight of a lubricating phase having a particle size essentially less than 120 .mu.m, preferably less than 60 .mu.m; c) 0-15% by weight of a hard phase material having a particle size essentially less than 10 .mu.m; and d) 0-7% of additives in a mixing chamber; evacuating the mixing chamber; filling the mixing chamber with an insert gas, mixing the ingredients with at most 1% by weight of a binding agent, and adding a solvent and drying the obtained powder.

REFERENCES:
patent: 4946499 (1990-08-01), Sakuranda et al.
patent: 5135566 (1992-08-01), Sakuranda et al.
patent: 5368630 (1994-11-01), Luk
patent: 5429792 (1995-07-01), Luk

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