Patent Number: 6,254,658

Title: Cemented carbide cutting tool

Abstract: To provide a cemented carbide cutting tool having high chipping resistance. In a cutting tool made of a cemented carbide alloy comprising 8 to 13 percent by weight of Co; the Co based alloy containing W and C components as constituents for forming a dispersing phase, a V component, and an optional Cr component, and forming a binding phase; the residual dispersing phase having an average particle diameter of 1 .mu.m or less; the alloy further containing 72 to 90 percent by area of WC according to measurement of an electron microscopic texture and fine (V,W)C or fine (V,Cr,W)C; each of the contents of the V and Cr components being 0.1 to 2 percent by weight of the total; the tungsten carbide as a constituent of the dispersing phase has a texture in which ultra-fine particles having a particle diameter of 100 nm or less of the Co-based cemented carbide alloy are dispersed in a tungsten carbide matrix.

Inventors: Taniuchi; Toshiyuki (Ibaraki-ken, JP), Okada; Kazuki (Ibaraki-ken, JP), Akiyama; Kazuhiro (Ohmiya, JP)

Assignee: Mitsubishi Materials Corporation

International Classification: C22C 29/08 (20060101); C22C 1/05 (20060101); C22C 29/06 (20060101); C22C 029/08 ()

Expiration Date: 07/03/2018