| 摘要 |
<p>A tungsten carbide-based sintered object is provided which has high hardness and excellent wearing resistance and prolongs the life of tools in the high-speed machining of special alloys such as titanium alloys and of iron-based materials. The tungsten carbide-based sintered object comprises 0.1-2 wt.% one or the two selected from chromium carbide and vanadium carbide, 0.1-1 wt.% iron-group metal(s), and tungsten carbides and incidental impurities as the remainder. The tungsten carbides comprise WC and W2C. When the intensity for the X-ray diffraction peak assigned to the (101) plane of the WC and the intensity for the X-ray diffraction peak assigned to the (101) plane of the W2C are expressed by IWC(101) and IW2C(101), respectively, then the X-ray diffraction peak intensity ratio IW2C(101)/(IWC(101)+IW2C(101)) is 0.2-0.3.</p> |
