| 摘要 |
A coated cemented (binder alloy, e.g., cobalt-chromium alloy) tungsten carbide cutting insert (10, 40) that comprises a substrate (18, 49) and a coating (29, 59). The substrate contains at least about 70 weight percent tungsten and carbon, between about 3 weight percent and about 12 weight percent cobalt, and at least 0.09 weight percent chromium. The substrate (18, 49) presents a surface zone of binder alloy enrichment (22, 56) that begins near (or at) and extends inwardly from a peripheral surface of the substrate. The coating includes a base layer (30, 60) that contains chromium. |
