| 摘要 |
A coated, laminated crater-resisting, composite, cemented carbide cutting tool insert. The cutting insert has a cemented metal carbide core comprising about 85 to 98 percent by weight metal carbide, the majority being tungsten carbide cemented together with an iron-group element binder, such as iron, nickel or cobalt. The core supports a crater resistant layer of cemented carbide containing tungsten carbide and at least one carbide of a metal contained in Groups IVb or Vb of the periodic table, and the rake face and flanks of the cutting insert are coated with a hard surface coating, e.g. titanium carbide the hard surface coating being about 0.0001 to 0.001 inch thick. |
