There is disclosed a cemented carbide insert with excellent properties for
machining of steels and stainless steels. The cemented carbide comprises
WC and 4-25% Co. The WC-grains have an average grain size in the range
0.2-3.5 .mu.m and a narrow grain size distribution in the range 0-4.5
.mu.m.According to the method of the invention a cemented carbide cutting
tool insert is made by mixing powders of WC, TiC, TaC and/or NbC, binder
metal and pressing agent, drying preferably by spray drying, pressing to
inserts and sintering. The method characterised in that a
deagglomerated WC-powder with a narrow grain size distribution is used,
that the powders of TiC, TaC and/or NbC are deagglomerated and that the
mixing is wet mixing with no change in grain size or grain size
distribution.