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:
Feb. 17, 1998
Filed:
Mar. 17, 1994
Applicant:
Inventors:
Assignee:
Sandvik AB, Sandviken, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ; C23C / ;
U.S. Cl.
CPC ...
427249 ; 427562 ; 427566 ; 427577 ; 427582 ; 427585 ; 427586 ; 427590 ; 427596 ; 428552 ;
Abstract
The invention relates to a coated cemented carbide body for rock drilling having a substrate containing at least one metal carbide and a binder metal and an at least partly covering coating comprising at least one diamond- or cBN-layer applied by CVD- or PVD-technique. The cemented carbide body has a core of cemented carbide containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.