Patent ID: 6210632
Filing Date: 2001-04-03
Classification: B22F,C22C,C23C

Abstract:
A method of making a cemented carbide body comprising wet mixing without milling of at least two different WC-powders with deagglomerated powders of other carbides and a binder metal such that the WC-powers are coated with the binder phase, said WC-grains being deagglomerated before and after being coated with binder metal, the grains of the WC-powder being classified in at least two groups in which a group of smaller grains has a maximum grain size a.sub.max and a group of larger grains has a minimum grain size b.sub.min, each group containing at least 10% of the total amount of WC grains wherein b.sub.min -a.sub.max >0.5 mm, the variation in grain size within each group being >1 .mu.m, drying said mixture, pressing to a desired shape and sintering said pressed bodies.