US RE40,026 E1 | ||
Cemented carbide insert for turning, milling and drilling | ||
Mats Waldenstrom, Bromma (Sweden); Ake Ostlund, Hagersten (Sweden); and Ove Alm, Hägersten (Sweden) | ||
Assigned to Sandvik Intellectual Property AB, Sandviken (Sweden) | ||
Appl. No. 11/449,008 PCT Filed Jul. 08, 1997, PCT No. PCT/SE97/01243 § 371(c)(1), (2), (4) Date Apr. 20, 1999, PCT Pub. No. WO98/03691, PCT Pub. Date Jan. 29, 1998. |
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Application 11/449008 is a reissue of application No. 09/214923, filed on Apr. 20, 1999, now 6,221,479, filed on Apr. 24, 2001. | ||
Claims priority of application No. 9602811 (SE), filed on Jul. 19, 1996. | ||
Int. Cl. C04B 35/56 (2006.01) |
U.S. Cl. 428—325 [428/323; 428/697; 428/698; 428/701; 428/702; 51/307; 51/309] | 10 Claims |
1. A cemented carbide insert provided with a thin wear resistant coating with excellent properties for machining of steels
and stainless steels comprising WC, 5-12.5 wt-% Co and 0-10 wt-% cubic carbides such as TiC, TaC, NbC or mixtures thereof
wherein the WC-grains have an average grain size in the range 1.0-3.0 μm the WC grains have a narrow grain size distribution
in the range 0.5-4.5 μm the W-content in the binder phase expressed as the “CW-ratio” defined as
![]() where Ms is the measured saturation magnetization of the sintered cemented carbide insert in |