The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2000
Filed:
Jun. 03, 1999
Johan Arvidsson, Nyhamslage, SE;
Fredrik Emilsson, Angelholm, SE;
Hoganas AB, Hoganas, SE;
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.