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:
Jun. 09, 2009
Filed:
May. 14, 2004
Walter Lengauer, Vienna, AT;
Vera Ucakar, Vienna, AT;
Klaus Dreyer, Essen, DE;
Dieter Kassel, Witten, DE;
Hans Werner Daub, Köln, DE;
Walter Lengauer, Vienna, AT;
Vera Ucakar, Vienna, AT;
Klaus Dreyer, Essen, DE;
Dieter Kassel, Witten, DE;
Hans Werner Daub, Köln, DE;
Kennametal Widia Produktions GmbH & Co. KG, Essen, DE;
Abstract
A hard metal or cermet body has a 2 to 100 μm thick first layer having a binder metal proportion of 2 to 25 mass % and up to 25 volume % of a nitride or carbonitride of one or more metals of Group IVa of the periodic system or up to 10 volume % of a carbide or carbonitride of V, Nb, Ta or Cr, balance WC, whereby the amount of nitride, carbonitride or carbide of the afore-mentioned metals amounts to at least 0.01 volume %. Under the first layer is a 2 to 40 μm thick second layer with an enhanced nitrogen proportion relative to the first layer, is disposed. Thereunder is a transition zone with a thickness of 2 to 100 μm in which the composition gradually changes to a homogeneous composition in the inner core of the hard metal or cermet body.