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:
May. 26, 2009
Filed:
May. 16, 2006
Ulf Jutterström, Stockholm, SE;
Annika Kauppi, Hässelby, SE;
Ulf Jutterström, Stockholm, SE;
Annika Kauppi, Hässelby, SE;
Sandvik Intellectual Property AB, Sandviken, SE;
Abstract
The present invention relates to a method of making an agglomerated powder mixture by wet milling a powder mixture containing hard constituent powder(s) based on carbides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and greater than about 15 wt-% binder phase powder(s) of Co and/or Ni as well as pressing agents and spray drying said slurry. By adding to said powder mixture before milling in addition from about 0.05 to about 0.50 wt-% of a complex forming and/or pH-decreasing/increasing additive such as triethanolamine, hydroxides or acids and a thickener in an amount of from about 0.01 to about 0.10 wt-% agglomerates with excellent flow properties are obtained.