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:
Mar. 16, 2004
Filed:
Oct. 11, 2001
Applicant:
Inventors:
Per Blomstedt, Uppsala, SE;
Mikael Lagerqvist, Upplands Väsby, SE;
Marian Mikus, Skärholmen, SE;
Assignee:
Sandvik AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 3/02 ;
U.S. Cl.
CPC ...
B05D 3/02 ;
Abstract
A method of making a cemented carbide body having WC with an average grain size of 0.5-4 &mgr;m, 3.5-9 wt % Co and <2 wt % carbides of Ta, Ti and Nb, and with a substoichiometric carbon content, the method including sintering the body such that an eta phase containing structure is obtained with a size of 1-15 &mgr;m and a content of 10 vol. %-35 vol. %, and subjecting the body to recarburization such that the eta phase in a 50-350 &mgr;m wide intermediate zone is transformed to WC+Co without essentially changing its Co-content.