Hard metal or cermet body and method for producing the same

Details Hard metal or cermet body and method for producing the same Hard metal or cermet body and method for producing the same

2004-05-14

2009-06-09

Turner, Archene (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C427S255110, C427S255210, C427S255280, C427S314000, C427S331000, C427S419100, C427S419700, C428S336000, C428S472000, C428S697000, C428S698000, C428S699000

Reexamination Certificate

active

07544410

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.

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patent: 5856032 (1999-01-01), Daub et al.
patent: 6110603 (2000-08-01), Chen et al.
patent: 2005/0224958 (2005-10-01), Kassel et al.

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