| 摘要 |
<p>A hard alloy which is excellent in the machining characteristics as a tool and has high hardness, abrasion resistance, corrosion resistance and stiffness. The alloy comprises at least 80 wt. % of WC with a mean grain diameter of 2 mu m or less, 0.2-2 wt. % of Co, and the balance comprising at least one member selected among metals, carbides, nitrides and carbonitrides of the group IVa, Va and VIa elements of the periodic table, wherein said at least one member comprises at least one of Mo and Mo2C in an amount of 2.0-7.0 wt. % based on the alloy and COxWyCz is present in the sinter of the alloy. The addition of Mo or Mo2C and VC serves to inhibit the grain growth in the hard phase and improve the wettability of WC-Co. As a result, this alloy is excellent in the machining characteristics as the alloy for tools such as cutting, sliding and wire drawing dies and as a high- pressure water jet nozzle and has high hardness, abrasion resistance, corrosion resistance and stiffness.</p> |
