| 摘要 |
<p>Multilayer coated cemented carbides of high wear resistance and toughness are provided comprising a substrate of cemented carbide, an inner layer contacted with the surface of the substrate, and an outer layer contacted with the inner layer, the inner layer being a single layer and/or laminated layers consisting of at least one member selected from the group consisting of carbides, nitrides, carbonitrides, carboxynitrides, oxynitrides, boronitrides and borocarbonitrides of Ti, and the outer layer being a multilayer with a total thickness of 5 to 20 µm, consisting of a plurality of Al<Sub>2</Sub>O<Sub>3</Sub> layer each having a thickness of 0.01 to 2 µm, each consisting of an Al<Sub>2</Sub>O<Sub>3</Sub> film in which titanium oxide is dissolved or at most 30 vol % of titanium oxide is coexistent and being respectively divided by interlayers each having a thickness of 0.01 to 2 µm and each consisting of TiC, TiN, TiCN,TiCNO, TiNO, Ti oxides, Ti(B, N), Ti(B, N, C), SiC, AIN and AION. The carbides may be used for cutting tools.</p> |
