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:
Jan. 08, 2002
Filed:
Feb. 19, 1999
Applicant:
Inventors:
Jan Qvick, Virsbo, SE;
Bo Jansson, Hägersten, SE;
Assignee:
Seco Tools AB, Fagersta, SE;
Primary Examiner:
Int. Cl.
CPC ...
B22F 3/12 ; C22C 1/05 ;
U.S. Cl.
CPC ...
B22F 3/12 ; C22C 1/05 ;
Abstract
An improved method of making submicron cemented carbide bodies include wet milling powders of WC and Co and grain growth inhibitors to a slurry, drying the slurry to a powder, uniaxial pressing of the powder to form bodies of a desired shape, and sintering. WC powder is provided with an FSSS grain size, d , of less than 1 &mgr;m and a Co powder with an FSSS grain size, d , such that the ratio d /d is 0.75-1.5.