| 摘要 |
A coated sintered cemented carbide body includes a cemented carbide body, a first layer adjacent the cemented carbide body, the first layer including Ti(C,N) and having a thickness of from about 3 to about 20 mum, an alumina layer adjacent said first layer, the alumina layer including alpha-Al2O3 or kappa-Al2O3 and having a thickness of from about 1 to about 15 mum, and a further layer adjacent the aluminum layer of a carbide, carbonitride or carboxynitride of one or more of Ti, Zr and Hf, the further layer having a thickness of from about 1 to 15 mum. A friction-reducing layer, including one or more of gamma-Al2O3, kappa-Al2O3 and nanocrystalline Ti(C,N) and having a thickness of from about 1 to about 5 mum, can be adjacent to the further layer. A method to cut steel with a sintered cemented carbide body where the alumina is alpha-Al2O3 and a method to cut cast iron with a sintered cemented carbide body where the alumina is alpha-Al2O3.
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